diff --git a/Rakefile b/Rakefile
index d88668ac312..eb2bfa863d8 100644
--- a/Rakefile
+++ b/Rakefile
@@ -126,7 +126,10 @@ TEST_METADATA = {
     'contrib' => '❌ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby'
   },
   'rack' => {
-    'contrib' => '✅ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby'
+    # Non-deprecated form of Regexp.new does not backport to Rack 1.x, see: https://github.com/rack/rack/pull/1998
+    'rack-1' => '✅ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ❌ 3.3 / ✅ jruby',
+    'rack-2' => '❌ 2.1 / ❌ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby',
+    'rack-3' => '❌ 2.1 / ❌ 2.2 / ❌ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby',
   },
   'rake' => {
     'contrib' => '✅ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby'
@@ -239,7 +242,10 @@ TEST_METADATA = {
     'redis-5' => '❌ 2.1 / ❌ 2.2 / ❌ 2.3 / ❌ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby'
   },
   'appsec:rack' => {
-    'contrib' => '✅ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby'
+    # Non-deprecated form of Regexp.new does not backport to Rack 1.x, see: https://github.com/rack/rack/pull/1998
+    'rack-1' => '✅ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ❌ 3.3 / ✅ jruby',
+    'rack-2' => '❌ 2.1 / ❌ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby',
+    'rack-3' => '❌ 2.1 / ❌ 2.2 / ❌ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby',
   },
   'appsec:sinatra' => {
     'contrib' => '✅ 2.1 / ✅ 2.2 / ✅ 2.3 / ✅ 2.4 / ✅ 2.5 / ✅ 2.6 / ✅ 2.7 / ✅ 3.0 / ✅ 3.1 / ✅ 3.2 / ✅ 3.3 / ✅ jruby'
diff --git a/appraisal/jruby-9.2.21.0.rb b/appraisal/jruby-9.2.21.0.rb
index bc13a83ae31..59562e32c67 100644
--- a/appraisal/jruby-9.2.21.0.rb
+++ b/appraisal/jruby-9.2.21.0.rb
@@ -231,6 +231,14 @@
   gem 'que', '>= 1.0.0', '< 2.0.0'
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra'
   gem 'rack-test'
diff --git a/appraisal/jruby-9.3.9.0.rb b/appraisal/jruby-9.3.9.0.rb
index 09232d5bbc5..f15dfb7b21e 100644
--- a/appraisal/jruby-9.3.9.0.rb
+++ b/appraisal/jruby-9.3.9.0.rb
@@ -202,6 +202,14 @@
   gem 'que', '>= 1.0.0', '< 2.0.0'
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/jruby-9.4.0.0.rb b/appraisal/jruby-9.4.0.0.rb
index 664717f2ed2..cd3e94b7e6e 100644
--- a/appraisal/jruby-9.4.0.0.rb
+++ b/appraisal/jruby-9.4.0.0.rb
@@ -114,6 +114,14 @@
   end
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/ruby-2.1.10.rb b/appraisal/ruby-2.1.10.rb
index d43761622db..1a071229552 100644
--- a/appraisal/ruby-2.1.10.rb
+++ b/appraisal/ruby-2.1.10.rb
@@ -111,6 +111,14 @@
   gem 'timers', '< 4.2'
 end
 
+[1].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra'
   gem 'rack-test'
diff --git a/appraisal/ruby-2.2.10.rb b/appraisal/ruby-2.2.10.rb
index fa9c8b2b450..edee69be9e1 100644
--- a/appraisal/ruby-2.2.10.rb
+++ b/appraisal/ruby-2.2.10.rb
@@ -180,6 +180,14 @@
   gem 'que', '>= 1.0.0', '< 2.0.0'
 end
 
+[1].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra'
   gem 'rack-test'
diff --git a/appraisal/ruby-2.3.8.rb b/appraisal/ruby-2.3.8.rb
index fb47ee7ec21..590028f007c 100644
--- a/appraisal/ruby-2.3.8.rb
+++ b/appraisal/ruby-2.3.8.rb
@@ -188,6 +188,14 @@
   gem 'que', '>= 1.0.0', '< 2.0.0'
 end
 
+[1, 2].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '< 3.0'
   gem 'mustermann', '< 3.0'
diff --git a/appraisal/ruby-2.4.10.rb b/appraisal/ruby-2.4.10.rb
index ad0ef065e65..ac2e1a52f51 100644
--- a/appraisal/ruby-2.4.10.rb
+++ b/appraisal/ruby-2.4.10.rb
@@ -123,6 +123,14 @@
   gem 'makara', '~> 0.3.0'
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra'
   gem 'rack-test'
diff --git a/appraisal/ruby-2.5.9.rb b/appraisal/ruby-2.5.9.rb
index e42c6621ea8..653f8e0def4 100644
--- a/appraisal/ruby-2.5.9.rb
+++ b/appraisal/ruby-2.5.9.rb
@@ -206,6 +206,14 @@
   gem 'que', '>= 1.0.0', '< 2.0.0'
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra'
   gem 'rack-test'
diff --git a/appraisal/ruby-2.6.10.rb b/appraisal/ruby-2.6.10.rb
index 1e3fc5b2a39..af2a3fa1fbe 100644
--- a/appraisal/ruby-2.6.10.rb
+++ b/appraisal/ruby-2.6.10.rb
@@ -204,6 +204,14 @@
   gem 'que', '>= 1.0.0', '< 2.0.0'
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/ruby-2.7.6.rb b/appraisal/ruby-2.7.6.rb
index f31692348ab..2052b50f87a 100644
--- a/appraisal/ruby-2.7.6.rb
+++ b/appraisal/ruby-2.7.6.rb
@@ -202,6 +202,14 @@
   gem 'que', '>= 1.0.0'
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/ruby-3.0.4.rb b/appraisal/ruby-3.0.4.rb
index 95fbca9883a..a91e1578076 100644
--- a/appraisal/ruby-3.0.4.rb
+++ b/appraisal/ruby-3.0.4.rb
@@ -113,6 +113,14 @@
   end
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/ruby-3.1.2.rb b/appraisal/ruby-3.1.2.rb
index 95fbca9883a..a91e1578076 100644
--- a/appraisal/ruby-3.1.2.rb
+++ b/appraisal/ruby-3.1.2.rb
@@ -113,6 +113,14 @@
   end
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/ruby-3.2.0.rb b/appraisal/ruby-3.2.0.rb
index 95fbca9883a..a91e1578076 100644
--- a/appraisal/ruby-3.2.0.rb
+++ b/appraisal/ruby-3.2.0.rb
@@ -113,6 +113,14 @@
   end
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/appraisal/ruby-3.3.0.rb b/appraisal/ruby-3.3.0.rb
index 95fbca9883a..a91e1578076 100644
--- a/appraisal/ruby-3.3.0.rb
+++ b/appraisal/ruby-3.3.0.rb
@@ -113,6 +113,14 @@
   end
 end
 
+[1, 2, 3].each do |n|
+  appraise "rack-#{n}" do
+    gem 'rack', "~> #{n}"
+    gem 'rack-contrib'
+    gem 'rack-test'
+  end
+end
+
 appraise 'sinatra' do
   gem 'sinatra', '>= 3'
   gem 'rack-test'
diff --git a/gemfiles/jruby_9.2.21.0_rack_1.gemfile b/gemfiles/jruby_9.2.21.0_rack_1.gemfile
new file mode 100644
index 00000000000..8db1a4b3776
--- /dev/null
+++ b/gemfiles/jruby_9.2.21.0_rack_1.gemfile
@@ -0,0 +1,39 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.2.21.0_rack_1.gemfile.lock b/gemfiles/jruby_9.2.21.0_rack_1.gemfile.lock
new file mode 100644
index 00000000000..b8dd1c56b5f
--- /dev/null
+++ b/gemfiles/jruby_9.2.21.0_rack_1.gemfile.lock
@@ -0,0 +1,148 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-debug-base (0.11.0-java)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-1.8
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.2.21.0_rack_2.gemfile b/gemfiles/jruby_9.2.21.0_rack_2.gemfile
new file mode 100644
index 00000000000..3bb18a4e26d
--- /dev/null
+++ b/gemfiles/jruby_9.2.21.0_rack_2.gemfile
@@ -0,0 +1,39 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.2.21.0_rack_2.gemfile.lock b/gemfiles/jruby_9.2.21.0_rack_2.gemfile.lock
new file mode 100644
index 00000000000..b9f0dbd26d0
--- /dev/null
+++ b/gemfiles/jruby_9.2.21.0_rack_2.gemfile.lock
@@ -0,0 +1,148 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-debug-base (0.11.0-java)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-1.8
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.2.21.0_rack_3.gemfile b/gemfiles/jruby_9.2.21.0_rack_3.gemfile
new file mode 100644
index 00000000000..52d94ee404b
--- /dev/null
+++ b/gemfiles/jruby_9.2.21.0_rack_3.gemfile
@@ -0,0 +1,39 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.2.21.0_rack_3.gemfile.lock b/gemfiles/jruby_9.2.21.0_rack_3.gemfile.lock
new file mode 100644
index 00000000000..7f7eb7bef6e
--- /dev/null
+++ b/gemfiles/jruby_9.2.21.0_rack_3.gemfile.lock
@@ -0,0 +1,148 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-debug-base (0.11.0-java)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-1.8
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.3.9.0_rack_1.gemfile b/gemfiles/jruby_9.3.9.0_rack_1.gemfile
new file mode 100644
index 00000000000..3d8176ca177
--- /dev/null
+++ b/gemfiles/jruby_9.3.9.0_rack_1.gemfile
@@ -0,0 +1,43 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.3.9.0_rack_1.gemfile.lock b/gemfiles/jruby_9.3.9.0_rack_1.gemfile.lock
new file mode 100644
index 00000000000..531ea5e289e
--- /dev/null
+++ b/gemfiles/jruby_9.3.9.0_rack_1.gemfile.lock
@@ -0,0 +1,182 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json (2.6.3-java)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    racc (1.7.1-java)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.4.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.17.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-debug-base (0.11.0-java)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-11
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.3.9.0_rack_2.gemfile b/gemfiles/jruby_9.3.9.0_rack_2.gemfile
new file mode 100644
index 00000000000..9fc386e5dd5
--- /dev/null
+++ b/gemfiles/jruby_9.3.9.0_rack_2.gemfile
@@ -0,0 +1,43 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.3.9.0_rack_2.gemfile.lock b/gemfiles/jruby_9.3.9.0_rack_2.gemfile.lock
new file mode 100644
index 00000000000..e6cdab30762
--- /dev/null
+++ b/gemfiles/jruby_9.3.9.0_rack_2.gemfile.lock
@@ -0,0 +1,182 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json (2.6.3-java)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    racc (1.7.1-java)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.4.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.17.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-debug-base (0.11.0-java)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-11
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.3.9.0_rack_3.gemfile b/gemfiles/jruby_9.3.9.0_rack_3.gemfile
new file mode 100644
index 00000000000..62698de0503
--- /dev/null
+++ b/gemfiles/jruby_9.3.9.0_rack_3.gemfile
@@ -0,0 +1,43 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.3.9.0_rack_3.gemfile.lock b/gemfiles/jruby_9.3.9.0_rack_3.gemfile.lock
new file mode 100644
index 00000000000..774e939fcc5
--- /dev/null
+++ b/gemfiles/jruby_9.3.9.0_rack_3.gemfile.lock
@@ -0,0 +1,182 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json (2.6.3-java)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    racc (1.7.1-java)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.4.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.17.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-debug-base (0.11.0-java)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-11
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.4.0.0_rack_1.gemfile b/gemfiles/jruby_9.4.0.0_rack_1.gemfile
new file mode 100644
index 00000000000..6d8e7e79b54
--- /dev/null
+++ b/gemfiles/jruby_9.4.0.0_rack_1.gemfile
@@ -0,0 +1,44 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.4.0.0_rack_1.gemfile.lock b/gemfiles/jruby_9.4.0.0_rack_1.gemfile.lock
new file mode 100644
index 00000000000..514d89955df
--- /dev/null
+++ b/gemfiles/jruby_9.4.0.0_rack_1.gemfile.lock
@@ -0,0 +1,184 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json (2.6.3-java)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    racc (1.7.1-java)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-debug-base (0.11.0-java)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-11
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.4.0.0_rack_2.gemfile b/gemfiles/jruby_9.4.0.0_rack_2.gemfile
new file mode 100644
index 00000000000..d140acec963
--- /dev/null
+++ b/gemfiles/jruby_9.4.0.0_rack_2.gemfile
@@ -0,0 +1,44 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.4.0.0_rack_2.gemfile.lock b/gemfiles/jruby_9.4.0.0_rack_2.gemfile.lock
new file mode 100644
index 00000000000..63a0e6d011e
--- /dev/null
+++ b/gemfiles/jruby_9.4.0.0_rack_2.gemfile.lock
@@ -0,0 +1,184 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json (2.6.3-java)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    racc (1.7.1-java)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-debug-base (0.11.0-java)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-11
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/jruby_9.4.0.0_rack_3.gemfile b/gemfiles/jruby_9.4.0.0_rack_3.gemfile
new file mode 100644
index 00000000000..eeb0dae99f1
--- /dev/null
+++ b/gemfiles/jruby_9.4.0.0_rack_3.gemfile
@@ -0,0 +1,44 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-debugger-jruby"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_9.4.0.0_rack_3.gemfile.lock b/gemfiles/jruby_9.4.0.0_rack_3.gemfile.lock
new file mode 100644
index 00000000000..ebc090114c7
--- /dev/null
+++ b/gemfiles/jruby_9.4.0.0_rack_3.gemfile.lock
@@ -0,0 +1,184 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.15.5-java)
+    hashdiff (1.0.1)
+    json (2.6.3-java)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0-java)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2-java)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2-java)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+      spoon (~> 0.0)
+    pry-debugger-jruby (2.1.1-java)
+      pry (>= 0.13, < 0.15)
+      ruby-debug-base (>= 0.10.4, < 0.12)
+    racc (1.7.1-java)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-debug-base (0.11.0-java)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    spoon (0.0.6)
+      ffi
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  universal-java-11
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-debugger-jruby
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.1.10_rack_1.gemfile b/gemfiles/ruby_2.1.10_rack_1.gemfile
new file mode 100644
index 00000000000..02a4ca88b45
--- /dev/null
+++ b/gemfiles/ruby_2.1.10_rack_1.gemfile
@@ -0,0 +1,45 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.2.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby", "< 1.1.10"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json", "< 2.6"
+gem "json-schema", "< 3"
+gem "memory_profiler", "= 0.9.12"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", "~> 12.3"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", "<= 0.4.1"
+gem "simplecov", "~> 0.17"
+gem "simplecov-html", "~> 0.10.2"
+gem "webmock", ">= 3.10.0"
+gem "rexml", "< 3.2.5"
+gem "yard", ["~> 0.9", "< 0.9.27"]
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.8.0"]
+gem "docile", "~> 1.3.5"
+gem "ffi", "~> 1.12.2"
+gem "msgpack", "~> 1.3.3"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.1.10_rack_1.gemfile.lock b/gemfiles/ruby_2.1.10_rack_1.gemfile.lock
new file mode 100644
index 00000000000..a0955b15ae4
--- /dev/null
+++ b/gemfiles/ruby_2.1.10_rack_1.gemfile.lock
@@ -0,0 +1,137 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.2.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    concurrent-ruby (1.1.9)
+    crack (0.4.5)
+      rexml
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.12.2)
+    google-protobuf (3.6.1)
+    hashdiff (1.0.1)
+    json (2.5.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0)
+      ffi (~> 1.0)
+    memory_profiler (0.9.12)
+    method_source (1.0.0)
+    msgpack (1.3.3)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (12.3.3)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.4)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.4.1)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    simplecov (0.17.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.26)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  appraisal (~> 2.2.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby (< 1.1.10)
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  ffi (~> 1.12.2)
+  google-protobuf (~> 3.0, < 3.8.0, != 3.7.1, != 3.7.0)
+  json (< 2.6)
+  json-schema (< 3)
+  memory_profiler (= 0.9.12)
+  msgpack (~> 1.3.3)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (~> 12.3)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rexml (< 3.2.5)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (<= 0.4.1)
+  simplecov (~> 0.17)
+  simplecov-html (~> 0.10.2)
+  webmock (>= 3.10.0)
+  yard (~> 0.9, < 0.9.27)
+
+BUNDLED WITH
+   1.17.3
diff --git a/gemfiles/ruby_2.2.10_rack_1.gemfile b/gemfiles/ruby_2.2.10_rack_1.gemfile
new file mode 100644
index 00000000000..97ee41402d9
--- /dev/null
+++ b/gemfiles/ruby_2.2.10_rack_1.gemfile
@@ -0,0 +1,45 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.2.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json", "< 2.6"
+gem "json-schema", "< 3"
+gem "memory_profiler", "= 0.9.12"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", "<= 0.4.1"
+gem "simplecov", "~> 0.17"
+gem "simplecov-html", "~> 0.10.2"
+gem "webmock", ">= 3.10.0"
+gem "rexml", "< 3.2.5"
+gem "yard", ["~> 0.9", "< 0.9.27"]
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.8.0"]
+gem "docile", "~> 1.3.5"
+gem "ffi", "~> 1.12.2"
+gem "msgpack", "~> 1.3.3"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.2.10_rack_1.gemfile.lock b/gemfiles/ruby_2.2.10_rack_1.gemfile.lock
new file mode 100644
index 00000000000..ced883198ed
--- /dev/null
+++ b/gemfiles/ruby_2.2.10_rack_1.gemfile.lock
@@ -0,0 +1,137 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.2.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    concurrent-ruby (1.1.10)
+    crack (0.4.5)
+      rexml
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.12.2)
+    google-protobuf (3.6.1)
+    hashdiff (1.0.1)
+    json (2.5.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0)
+      ffi (~> 1.0)
+    memory_profiler (0.9.12)
+    method_source (1.0.0)
+    msgpack (1.3.3)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.4)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.4.1)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    simplecov (0.17.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.26)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  appraisal (~> 2.2.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  ffi (~> 1.12.2)
+  google-protobuf (~> 3.0, < 3.8.0, != 3.7.1, != 3.7.0)
+  json (< 2.6)
+  json-schema (< 3)
+  memory_profiler (= 0.9.12)
+  msgpack (~> 1.3.3)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rexml (< 3.2.5)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (<= 0.4.1)
+  simplecov (~> 0.17)
+  simplecov-html (~> 0.10.2)
+  webmock (>= 3.10.0)
+  yard (~> 0.9, < 0.9.27)
+
+BUNDLED WITH
+   1.17.3
diff --git a/gemfiles/ruby_2.3.8_rack_1.gemfile b/gemfiles/ruby_2.3.8_rack_1.gemfile
new file mode 100644
index 00000000000..6e5b86dc832
--- /dev/null
+++ b/gemfiles/ruby_2.3.8_rack_1.gemfile
@@ -0,0 +1,42 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "simplecov", "~> 0.17"
+gem "simplecov-html", "~> 0.10.2"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "docile", "~> 1.3.5"
+gem "msgpack", "~> 1.3.3"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.3.8_rack_1.gemfile.lock b/gemfiles/ruby_2.3.8_rack_1.gemfile.lock
new file mode 100644
index 00000000000..e5309407768
--- /dev/null
+++ b/gemfiles/ruby_2.3.8_rack_1.gemfile.lock
@@ -0,0 +1,134 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.3.3)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.5)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    simplecov (0.17.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  msgpack (~> 1.3.3)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  simplecov (~> 0.17)
+  simplecov-html (~> 0.10.2)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   1.17.3
diff --git a/gemfiles/ruby_2.3.8_rack_2.gemfile b/gemfiles/ruby_2.3.8_rack_2.gemfile
new file mode 100644
index 00000000000..a39b16667c2
--- /dev/null
+++ b/gemfiles/ruby_2.3.8_rack_2.gemfile
@@ -0,0 +1,42 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "simplecov", "~> 0.17"
+gem "simplecov-html", "~> 0.10.2"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "docile", "~> 1.3.5"
+gem "msgpack", "~> 1.3.3"
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.3.8_rack_2.gemfile.lock b/gemfiles/ruby_2.3.8_rack_2.gemfile.lock
new file mode 100644
index 00000000000..16aa057ebe0
--- /dev/null
+++ b/gemfiles/ruby_2.3.8_rack_2.gemfile.lock
@@ -0,0 +1,134 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0)
+    libddwaf (1.14.0.0.0)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.3.3)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.5)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    simplecov (0.17.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  msgpack (~> 1.3.3)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  simplecov (~> 0.17)
+  simplecov-html (~> 0.10.2)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   1.17.3
diff --git a/gemfiles/ruby_2.4.10_rack_1.gemfile b/gemfiles/ruby_2.4.10_rack_1.gemfile
new file mode 100644
index 00000000000..57460f96c52
--- /dev/null
+++ b/gemfiles/ruby_2.4.10_rack_1.gemfile
@@ -0,0 +1,42 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", "~> 0.17"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "docile", "~> 1.3.5"
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.4.10_rack_1.gemfile.lock b/gemfiles/ruby_2.4.10_rack_1.gemfile.lock
new file mode 100644
index 00000000000..59f18e798e2
--- /dev/null
+++ b/gemfiles/ruby_2.4.10_rack_1.gemfile.lock
@@ -0,0 +1,138 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.10)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.6.1)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.5)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-prof (1.4.2)
+    simplecov (0.18.5)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.3)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  ruby-prof (~> 1.4)
+  simplecov (~> 0.17)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.4.10_rack_2.gemfile b/gemfiles/ruby_2.4.10_rack_2.gemfile
new file mode 100644
index 00000000000..564764cf3e9
--- /dev/null
+++ b/gemfiles/ruby_2.4.10_rack_2.gemfile
@@ -0,0 +1,42 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", "~> 0.17"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "docile", "~> 1.3.5"
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.4.10_rack_2.gemfile.lock b/gemfiles/ruby_2.4.10_rack_2.gemfile.lock
new file mode 100644
index 00000000000..e7c8db8de5a
--- /dev/null
+++ b/gemfiles/ruby_2.4.10_rack_2.gemfile.lock
@@ -0,0 +1,138 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.10)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.6.1)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.5)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-prof (1.4.2)
+    simplecov (0.18.5)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.3)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  ruby-prof (~> 1.4)
+  simplecov (~> 0.17)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.4.10_rack_3.gemfile b/gemfiles/ruby_2.4.10_rack_3.gemfile
new file mode 100644
index 00000000000..214399190b7
--- /dev/null
+++ b/gemfiles/ruby_2.4.10_rack_3.gemfile
@@ -0,0 +1,42 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", "~> 0.17"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "docile", "~> 1.3.5"
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.4.10_rack_3.gemfile.lock b/gemfiles/ruby_2.4.10_rack_3.gemfile.lock
new file mode 100644
index 00000000000..1fd3ed5ac6d
--- /dev/null
+++ b/gemfiles/ruby_2.4.10_rack_3.gemfile.lock
@@ -0,0 +1,138 @@
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.10)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    diff-lcs (1.5.0)
+    docile (1.3.5)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.6.1)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.5)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-prof (1.4.2)
+    simplecov (0.18.5)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.3)
+    thor (1.2.2)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  docile (~> 1.3.5)
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  ruby-prof (~> 1.4)
+  simplecov (~> 0.17)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.5.9_rack_1.gemfile b/gemfiles/ruby_2.5.9_rack_1.gemfile
new file mode 100644
index 00000000000..d1fc3ddd8eb
--- /dev/null
+++ b/gemfiles/ruby_2.5.9_rack_1.gemfile
@@ -0,0 +1,44 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.5.9_rack_1.gemfile.lock b/gemfiles/ruby_2.5.9_rack_1.gemfile.lock
new file mode 100644
index 00000000000..af47b531d28
--- /dev/null
+++ b/gemfiles/ruby_2.5.9_rack_1.gemfile.lock
@@ -0,0 +1,158 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (0.8.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    pry-stack_explorer (0.4.13)
+      binding_of_caller (~> 0.7)
+      pry (~> 0.13)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-prof (1.4.3)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.5.9_rack_2.gemfile b/gemfiles/ruby_2.5.9_rack_2.gemfile
new file mode 100644
index 00000000000..06e9086c23c
--- /dev/null
+++ b/gemfiles/ruby_2.5.9_rack_2.gemfile
@@ -0,0 +1,44 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.5.9_rack_2.gemfile.lock b/gemfiles/ruby_2.5.9_rack_2.gemfile.lock
new file mode 100644
index 00000000000..6c2a183736c
--- /dev/null
+++ b/gemfiles/ruby_2.5.9_rack_2.gemfile.lock
@@ -0,0 +1,158 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (0.8.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    pry-stack_explorer (0.4.13)
+      binding_of_caller (~> 0.7)
+      pry (~> 0.13)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-prof (1.4.3)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.5.9_rack_3.gemfile b/gemfiles/ruby_2.5.9_rack_3.gemfile
new file mode 100644
index 00000000000..885243a9e13
--- /dev/null
+++ b/gemfiles/ruby_2.5.9_rack_3.gemfile
@@ -0,0 +1,44 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-nav"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.5.9_rack_3.gemfile.lock b/gemfiles/ruby_2.5.9_rack_3.gemfile.lock
new file mode 100644
index 00000000000..1eb293647da
--- /dev/null
+++ b/gemfiles/ruby_2.5.9_rack_3.gemfile.lock
@@ -0,0 +1,158 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (0.8.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    pry-stack_explorer (0.4.13)
+      binding_of_caller (~> 0.7)
+      pry (~> 0.13)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.3.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    ruby-prof (1.4.3)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-nav
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.6.10_rack_1.gemfile b/gemfiles/ruby_2.6.10_rack_1.gemfile
new file mode 100644
index 00000000000..79368df342c
--- /dev/null
+++ b/gemfiles/ruby_2.6.10_rack_1.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.6.10_rack_1.gemfile.lock b/gemfiles/ruby_2.6.10_rack_1.gemfile.lock
new file mode 100644
index 00000000000..49af436ba2d
--- /dev/null
+++ b/gemfiles/ruby_2.6.10_rack_1.gemfile.lock
@@ -0,0 +1,194 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.8.0)
+      byebug (~> 11.0)
+      pry (~> 0.10)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.4.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.17.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.4.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.6.10_rack_2.gemfile b/gemfiles/ruby_2.6.10_rack_2.gemfile
new file mode 100644
index 00000000000..44e60dfc46c
--- /dev/null
+++ b/gemfiles/ruby_2.6.10_rack_2.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.6.10_rack_2.gemfile.lock b/gemfiles/ruby_2.6.10_rack_2.gemfile.lock
new file mode 100644
index 00000000000..b4e279f08d8
--- /dev/null
+++ b/gemfiles/ruby_2.6.10_rack_2.gemfile.lock
@@ -0,0 +1,194 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.8.0)
+      byebug (~> 11.0)
+      pry (~> 0.10)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.4.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.17.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.4.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.6.10_rack_3.gemfile b/gemfiles/ruby_2.6.10_rack_3.gemfile
new file mode 100644
index 00000000000..703fe431848
--- /dev/null
+++ b/gemfiles/ruby_2.6.10_rack_3.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1", "< 3.19.2"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.6.10_rack_3.gemfile.lock b/gemfiles/ruby_2.6.10_rack_3.gemfile.lock
new file mode 100644
index 00000000000..36f8dbe6a17
--- /dev/null
+++ b/gemfiles/ruby_2.6.10_rack_3.gemfile.lock
@@ -0,0 +1,194 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.19.1)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.8.0)
+      byebug (~> 11.0)
+      pry (~> 0.10)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.4.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.17.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.4.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, < 3.19.2, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.7.6_rack_1.gemfile b/gemfiles/ruby_2.7.6_rack_1.gemfile
new file mode 100644
index 00000000000..12efe0c3120
--- /dev/null
+++ b/gemfiles/ruby_2.7.6_rack_1.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.7.6_rack_1.gemfile.lock b/gemfiles/ruby_2.7.6_rack_1.gemfile.lock
new file mode 100644
index 00000000000..de1bc30dad7
--- /dev/null
+++ b/gemfiles/ruby_2.7.6_rack_1.gemfile.lock
@@ -0,0 +1,194 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.7.6_rack_2.gemfile b/gemfiles/ruby_2.7.6_rack_2.gemfile
new file mode 100644
index 00000000000..106f6741f6c
--- /dev/null
+++ b/gemfiles/ruby_2.7.6_rack_2.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.7.6_rack_2.gemfile.lock b/gemfiles/ruby_2.7.6_rack_2.gemfile.lock
new file mode 100644
index 00000000000..2e07814dfda
--- /dev/null
+++ b/gemfiles/ruby_2.7.6_rack_2.gemfile.lock
@@ -0,0 +1,194 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_2.7.6_rack_3.gemfile b/gemfiles/ruby_2.7.6_rack_3.gemfile
new file mode 100644
index 00000000000..2f51adb6ec9
--- /dev/null
+++ b/gemfiles/ruby_2.7.6_rack_3.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2.7.6_rack_3.gemfile.lock b/gemfiles/ruby_2.7.6_rack_3.gemfile.lock
new file mode 100644
index 00000000000..87aae7b47f9
--- /dev/null
+++ b/gemfiles/ruby_2.7.6_rack_3.gemfile.lock
@@ -0,0 +1,194 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.0.4_rack_1.gemfile b/gemfiles/ruby_3.0.4_rack_1.gemfile
new file mode 100644
index 00000000000..b14be0cba62
--- /dev/null
+++ b/gemfiles/ruby_3.0.4_rack_1.gemfile
@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.0.4_rack_1.gemfile.lock b/gemfiles/ruby_3.0.4_rack_1.gemfile.lock
new file mode 100644
index 00000000000..8e0ef300d87
--- /dev/null
+++ b/gemfiles/ruby_3.0.4_rack_1.gemfile.lock
@@ -0,0 +1,196 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.0.4_rack_2.gemfile b/gemfiles/ruby_3.0.4_rack_2.gemfile
new file mode 100644
index 00000000000..cb78145b915
--- /dev/null
+++ b/gemfiles/ruby_3.0.4_rack_2.gemfile
@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.0.4_rack_2.gemfile.lock b/gemfiles/ruby_3.0.4_rack_2.gemfile.lock
new file mode 100644
index 00000000000..6469bf0238e
--- /dev/null
+++ b/gemfiles/ruby_3.0.4_rack_2.gemfile.lock
@@ -0,0 +1,196 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.0.4_rack_3.gemfile b/gemfiles/ruby_3.0.4_rack_3.gemfile
new file mode 100644
index 00000000000..dd17ea3de6a
--- /dev/null
+++ b/gemfiles/ruby_3.0.4_rack_3.gemfile
@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.0.4_rack_3.gemfile.lock b/gemfiles/ruby_3.0.4_rack_3.gemfile.lock
new file mode 100644
index 00000000000..7ed127612a1
--- /dev/null
+++ b/gemfiles/ruby_3.0.4_rack_3.gemfile.lock
@@ -0,0 +1,196 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.1.2_rack_1.gemfile b/gemfiles/ruby_3.1.2_rack_1.gemfile
new file mode 100644
index 00000000000..b14be0cba62
--- /dev/null
+++ b/gemfiles/ruby_3.1.2_rack_1.gemfile
@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.1.2_rack_1.gemfile.lock b/gemfiles/ruby_3.1.2_rack_1.gemfile.lock
new file mode 100644
index 00000000000..8e0ef300d87
--- /dev/null
+++ b/gemfiles/ruby_3.1.2_rack_1.gemfile.lock
@@ -0,0 +1,196 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.1.2_rack_2.gemfile b/gemfiles/ruby_3.1.2_rack_2.gemfile
new file mode 100644
index 00000000000..cb78145b915
--- /dev/null
+++ b/gemfiles/ruby_3.1.2_rack_2.gemfile
@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.1.2_rack_2.gemfile.lock b/gemfiles/ruby_3.1.2_rack_2.gemfile.lock
new file mode 100644
index 00000000000..6469bf0238e
--- /dev/null
+++ b/gemfiles/ruby_3.1.2_rack_2.gemfile.lock
@@ -0,0 +1,196 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.1.2_rack_3.gemfile b/gemfiles/ruby_3.1.2_rack_3.gemfile
new file mode 100644
index 00000000000..dd17ea3de6a
--- /dev/null
+++ b/gemfiles/ruby_3.1.2_rack_3.gemfile
@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-byebug"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.1.2_rack_3.gemfile.lock b/gemfiles/ruby_3.1.2_rack_3.gemfile.lock
new file mode 100644
index 00000000000..7ed127612a1
--- /dev/null
+++ b/gemfiles/ruby_3.1.2_rack_3.gemfile.lock
@@ -0,0 +1,196 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-byebug (3.10.1)
+      byebug (~> 11.0)
+      pry (>= 0.13, < 0.15)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-byebug
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.2.0_rack_1.gemfile b/gemfiles/ruby_3.2.0_rack_1.gemfile
new file mode 100644
index 00000000000..56fdf1853fa
--- /dev/null
+++ b/gemfiles/ruby_3.2.0_rack_1.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.2.0_rack_1.gemfile.lock b/gemfiles/ruby_3.2.0_rack_1.gemfile.lock
new file mode 100644
index 00000000000..e4a295f5fb6
--- /dev/null
+++ b/gemfiles/ruby_3.2.0_rack_1.gemfile.lock
@@ -0,0 +1,191 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.2.0_rack_2.gemfile b/gemfiles/ruby_3.2.0_rack_2.gemfile
new file mode 100644
index 00000000000..51f5fbef2c5
--- /dev/null
+++ b/gemfiles/ruby_3.2.0_rack_2.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.2.0_rack_2.gemfile.lock b/gemfiles/ruby_3.2.0_rack_2.gemfile.lock
new file mode 100644
index 00000000000..a1009630bc9
--- /dev/null
+++ b/gemfiles/ruby_3.2.0_rack_2.gemfile.lock
@@ -0,0 +1,191 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.2.0_rack_3.gemfile b/gemfiles/ruby_3.2.0_rack_3.gemfile
new file mode 100644
index 00000000000..1170fc671ed
--- /dev/null
+++ b/gemfiles/ruby_3.2.0_rack_3.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.2.0_rack_3.gemfile.lock b/gemfiles/ruby_3.2.0_rack_3.gemfile.lock
new file mode 100644
index 00000000000..f0af3f641ec
--- /dev/null
+++ b/gemfiles/ruby_3.2.0_rack_3.gemfile.lock
@@ -0,0 +1,191 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3-aarch64-linux)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.3.0_rack_1.gemfile b/gemfiles/ruby_3.3.0_rack_1.gemfile
new file mode 100644
index 00000000000..56fdf1853fa
--- /dev/null
+++ b/gemfiles/ruby_3.3.0_rack_1.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 1"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.3.0_rack_1.gemfile.lock b/gemfiles/ruby_3.3.0_rack_1.gemfile.lock
new file mode 100644
index 00000000000..ae3c049ec25
--- /dev/null
+++ b/gemfiles/ruby_3.3.0_rack_1.gemfile.lock
@@ -0,0 +1,191 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (1.6.13)
+    rack-contrib (1.8.0)
+      rack (~> 1.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-stack_explorer
+  rack (~> 1)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.3.0_rack_2.gemfile b/gemfiles/ruby_3.3.0_rack_2.gemfile
new file mode 100644
index 00000000000..51f5fbef2c5
--- /dev/null
+++ b/gemfiles/ruby_3.3.0_rack_2.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 2"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.3.0_rack_2.gemfile.lock b/gemfiles/ruby_3.3.0_rack_2.gemfile.lock
new file mode 100644
index 00000000000..ec669214353
--- /dev/null
+++ b/gemfiles/ruby_3.3.0_rack_2.gemfile.lock
@@ -0,0 +1,191 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-stack_explorer
+  rack (~> 2)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/gemfiles/ruby_3.3.0_rack_3.gemfile b/gemfiles/ruby_3.3.0_rack_3.gemfile
new file mode 100644
index 00000000000..1170fc671ed
--- /dev/null
+++ b/gemfiles/ruby_3.3.0_rack_3.gemfile
@@ -0,0 +1,48 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4.0"
+gem "benchmark-ips", "~> 2.8"
+gem "benchmark-memory", "< 0.2"
+gem "builder"
+gem "climate_control", "~> 0.2.0"
+gem "concurrent-ruby"
+gem "extlz4", "~> 0.3", ">= 0.3.3"
+gem "json-schema", "< 3"
+gem "memory_profiler", "~> 0.9"
+gem "os", "~> 1.1"
+gem "pimpmychangelog", ">= 0.1.2"
+gem "pry"
+gem "pry-stack_explorer"
+gem "rake", ">= 10.5"
+gem "rake-compiler", "~> 1.1", ">= 1.1.1"
+gem "redcarpet", "~> 3.4"
+gem "rspec", "~> 3.12"
+gem "rspec-collection_matchers", "~> 1.1"
+gem "rspec-wait", "~> 0"
+gem "rspec_junit_formatter", ">= 0.5.1"
+gem "rspec_n", "~> 1.3"
+gem "ruby-prof", "~> 1.4"
+gem "simplecov", git: "https://github.com/DataDog/simplecov", ref: "3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db"
+gem "simplecov-cobertura", "~> 2.1.0"
+gem "warning", "~> 1"
+gem "webmock", ">= 3.10.0"
+gem "webrick", ">= 1.7.0"
+gem "yard", "~> 0.9"
+gem "rubocop", "~> 1.34.0", require: false
+gem "rubocop-packaging", "~> 0.5.2", require: false
+gem "rubocop-performance", "~> 1.9", require: false
+gem "rubocop-rspec", "~> 2.2", require: false
+gem "dogstatsd-ruby", ">= 3.3.0", "!= 5.0.0", "!= 5.0.1", "!= 5.1.0"
+gem "opentracing", ">= 0.4.1"
+gem "google-protobuf", ["~> 3.0", "!= 3.7.0", "!= 3.7.1"]
+gem "rack", "~> 3"
+gem "rack-contrib"
+gem "rack-test"
+
+group :check do
+
+end
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3.3.0_rack_3.gemfile.lock b/gemfiles/ruby_3.3.0_rack_3.gemfile.lock
new file mode 100644
index 00000000000..400c5c26535
--- /dev/null
+++ b/gemfiles/ruby_3.3.0_rack_3.gemfile.lock
@@ -0,0 +1,191 @@
+GIT
+  remote: https://github.com/DataDog/simplecov
+  revision: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  ref: 3bb6b7ee58bf4b1954ca205f50dd44d6f41c57db
+  specs:
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+
+PATH
+  remote: ..
+  specs:
+    ddtrace (1.14.0)
+      datadog-ci (~> 0.1.0)
+      debase-ruby_core_source (= 3.2.1)
+      libdatadog (~> 4.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.2)
+    benchmark-ips (2.12.0)
+    benchmark-memory (0.1.2)
+      memory_profiler (~> 0.9)
+    binding_of_caller (1.0.0)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.4)
+    climate_control (0.2.0)
+    coderay (1.1.3)
+    colorize (0.8.1)
+    concurrent-ruby (1.2.2)
+    crack (0.4.5)
+      rexml
+    cri (2.15.11)
+    datadog-ci (0.1.1)
+    debase-ruby_core_source (3.2.1)
+    debug_inspector (1.1.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    dogstatsd-ruby (5.6.1)
+    extlz4 (0.3.4)
+    ffi (1.15.5)
+    google-protobuf (3.24.3)
+    hashdiff (1.0.1)
+    json (2.6.3)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    libdatadog (4.0.0.1.0-aarch64-linux)
+    libddwaf (1.14.0.0.0-aarch64-linux)
+      ffi (~> 1.0)
+    memory_profiler (0.9.14)
+    method_source (1.0.0)
+    msgpack (1.7.2)
+    opentracing (0.5.0)
+    os (1.1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    pimpmychangelog (0.1.3)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
+      pry (~> 0.13)
+    racc (1.7.1)
+    rack (3.0.8)
+    rack-contrib (1.2.0)
+      rack (>= 0.9.1)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    rake-compiler (1.2.5)
+      rake
+    redcarpet (3.6.0)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-collection_matchers (1.2.0)
+      rspec-expectations (>= 2.99.0.beta1)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rspec-wait (0.0.9)
+      rspec (>= 3, < 4)
+    rspec_junit_formatter (0.6.0)
+      rspec-core (>= 2, < 4, != 2.12.0)
+    rspec_n (1.5.0)
+      colorize (~> 0.8.0)
+      cri (~> 2.15.3)
+    rubocop (1.34.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.1.2.1)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.20.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.19.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rspec (2.17.1)
+      rubocop (~> 1.33)
+    ruby-prof (1.6.3)
+    ruby-progressbar (1.13.0)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    thor (1.2.2)
+    unicode-display_width (2.4.2)
+    warning (1.3.0)
+    webmock (3.13.0)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.8.1)
+    yard (0.9.34)
+
+PLATFORMS
+  aarch64-linux
+
+DEPENDENCIES
+  appraisal (~> 2.4.0)
+  benchmark-ips (~> 2.8)
+  benchmark-memory (< 0.2)
+  builder
+  climate_control (~> 0.2.0)
+  concurrent-ruby
+  ddtrace!
+  dogstatsd-ruby (>= 3.3.0, != 5.1.0, != 5.0.1, != 5.0.0)
+  extlz4 (~> 0.3, >= 0.3.3)
+  google-protobuf (~> 3.0, != 3.7.1, != 3.7.0)
+  json-schema (< 3)
+  memory_profiler (~> 0.9)
+  opentracing (>= 0.4.1)
+  os (~> 1.1)
+  pimpmychangelog (>= 0.1.2)
+  pry
+  pry-stack_explorer
+  rack (~> 3)
+  rack-contrib
+  rack-test
+  rake (>= 10.5)
+  rake-compiler (~> 1.1, >= 1.1.1)
+  redcarpet (~> 3.4)
+  rspec (~> 3.12)
+  rspec-collection_matchers (~> 1.1)
+  rspec-wait (~> 0)
+  rspec_junit_formatter (>= 0.5.1)
+  rspec_n (~> 1.3)
+  rubocop (~> 1.34.0)
+  rubocop-packaging (~> 0.5.2)
+  rubocop-performance (~> 1.9)
+  rubocop-rspec (~> 2.2)
+  ruby-prof (~> 1.4)
+  simplecov!
+  simplecov-cobertura (~> 2.1.0)
+  warning (~> 1)
+  webmock (>= 3.10.0)
+  webrick (>= 1.7.0)
+  yard (~> 0.9)
+
+BUNDLED WITH
+   2.3.26
diff --git a/lib/datadog/tracing/contrib/rack/header_tagging.rb b/lib/datadog/tracing/contrib/rack/header_tagging.rb
index 9f597bdb1f4..c176374318e 100644
--- a/lib/datadog/tracing/contrib/rack/header_tagging.rb
+++ b/lib/datadog/tracing/contrib/rack/header_tagging.rb
@@ -37,10 +37,20 @@ def self.tag_response_headers(span, headers, configuration)
                      whitelist = configuration[:headers][:response] || []
                      whitelist.each_with_object({}) do |header, result|
                        header_value = headers[header]
-                       unless header_value.nil?
-                         header_tag = Tracing::Metadata::Ext::HTTP::ResponseHeaders.to_tag(header)
-                         result[header_tag] = header_value
-                       end
+
+                       next if header_value.nil?
+
+                       header_tag = Tracing::Metadata::Ext::HTTP::ResponseHeaders.to_tag(header)
+
+                       # Maintain the value format between Rack 2 and 3
+                       #
+                       # Rack 2.x => { 'foo' => 'bar,baz' }
+                       # Rack 3.x => { 'foo' => ['bar', 'baz'] }
+                       result[header_tag] = if header_value.is_a? Array
+                                              header_value.join(',')
+                                            else
+                                              header_value
+                                            end
                      end
                    end
 
diff --git a/spec/datadog/tracing/contrib/rack/header_tagging_spec.rb b/spec/datadog/tracing/contrib/rack/header_tagging_spec.rb
new file mode 100644
index 00000000000..a22aa0e7ed5
--- /dev/null
+++ b/spec/datadog/tracing/contrib/rack/header_tagging_spec.rb
@@ -0,0 +1,86 @@
+require 'rack'
+
+require 'datadog/tracing/contrib/rack/header_tagging'
+
+RSpec.describe Datadog::Tracing::Contrib::Rack::HeaderTagging do
+  describe '.tag_response_headers' do
+    before do
+      Datadog.configure do |c|
+        c.tracing.instrument :rack, headers: { response: ['foo'] }
+      end
+    end
+
+    after { Datadog.registry[:rack].reset_configuration! }
+
+    let(:span_op) { Datadog::Tracing::SpanOperation.new('rack.request') }
+    let(:configuration) { Datadog.configuration.tracing[:rack] }
+
+    subject(:tag_response_headers) do
+      described_class.tag_response_headers(span_op, headers, configuration)
+    end
+
+    context 'when given a header with a single value from response headers' do
+      let(:headers) do
+        Rack::Response.new('', 200, { 'foo' => 'bar' }).headers
+      end
+
+      it do
+        expect { tag_response_headers }.to change {
+          span_op.get_tag('http.response.headers.foo')
+        }.to('bar')
+      end
+    end
+
+    context 'when given a header with a multiple values from response headers' do
+      context 'when given headers object from response' do
+        before do
+          skip 'Rack 1.x does not support multiple header value' unless Rack::Response.new.respond_to?(:add_header)
+        end
+
+        # Rack 3.x breaking changes: Response header values can be an Array to handle multiple values
+        # (and no longer supports \n encoded headers).
+        #
+        # Achieve compatibility by using Rack::Response#add_header
+        # which provides an interface for adding headers without concern for the underlying format.
+        let(:headers) do
+          Rack::Response.new.tap do |r|
+            r.add_header('foo', 'bar')
+            r.add_header('foo', 'baz')
+          end.headers
+        end
+
+        it do
+          expect { tag_response_headers }.to change {
+            span_op.get_tag('http.response.headers.foo')
+          }.to('bar,baz')
+        end
+      end
+
+      context 'when given a concatentated string' do
+        # Rack 2.x returns a concatentated string for multiple values
+        let(:headers) do
+          { 'foo' => 'bar,baz' }
+        end
+
+        it do
+          expect { tag_response_headers }.to change {
+            span_op.get_tag('http.response.headers.foo')
+          }.to('bar,baz')
+        end
+      end
+
+      context 'when given an array of strings' do
+        # Rack 3.x returns an array of strings for multiple values
+        let(:headers) do
+          { 'foo' => ['bar', 'baz'] }
+        end
+
+        it do
+          expect { tag_response_headers }.to change {
+            span_op.get_tag('http.response.headers.foo')
+          }.to('bar,baz')
+        end
+      end
+    end
+  end
+end