Split impl for 1.22 and 1.21

example/dice/rolldice.go

@@ -4,15 +4,8 @@
 package main
 
 import (
-	"fmt"
-	"io"
-	"math/rand"
-	"net/http"
-	"strconv"
-
 	"go.opentelemetry.io/contrib/bridges/otelslog"
 	"go.opentelemetry.io/otel"
-	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/metric"
 	"go.opentelemetry.io/otel/sdk/instrumentation"
 )
@@ -39,27 +32,3 @@ func init() {
 		panic(err)
 	}
 }
-
-func rolldice(w http.ResponseWriter, r *http.Request) {
-	ctx, span := tracer.Start(r.Context(), "roll")
-	defer span.End()
-
-	roll := 1 + rand.Intn(6)
-
-	var msg string
-	if player := r.PathValue("player"); player != "" {
-		msg = fmt.Sprintf("%s is rolling the dice", player)
-	} else {
-		msg = "Anonymous player is rolling the dice"
-	}
-	logger.InfoContext(ctx, msg, "result", roll)
-
-	rollValueAttr := attribute.Int("roll.value", roll)
-	span.SetAttributes(rollValueAttr)
-	rollCnt.Add(ctx, 1, metric.WithAttributes(rollValueAttr))
-
-	resp := strconv.Itoa(roll) + "\n"
-	if _, err := io.WriteString(w, resp); err != nil {
-		logger.ErrorContext(ctx, "Write failed", "error", err)
-	}
-}

example/dice/rolldice_go1.21.go

@@ -0,0 +1,35 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:build !go1.22
+// +build !go1.22
+
+package main
+
+import (
+	"io"
+	"math/rand"
+	"net/http"
+	"strconv"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
+)
+
+func rolldice(w http.ResponseWriter, r *http.Request) {
+	ctx, span := tracer.Start(r.Context(), "roll")
+	defer span.End()
+
+	roll := 1 + rand.Intn(6)
+
+	logger.InfoContext(ctx, "Anonymous player is rolling the dice", "result", roll)
+
+	rollValueAttr := attribute.Int("roll.value", roll)
+	span.SetAttributes(rollValueAttr)
+	rollCnt.Add(ctx, 1, metric.WithAttributes(rollValueAttr))
+
+	resp := strconv.Itoa(roll) + "\n"
+	if _, err := io.WriteString(w, resp); err != nil {
+		logger.ErrorContext(ctx, "Write failed", "error", err)
+	}
+}

example/dice/rolldice_go1.22.go

@@ -0,0 +1,42 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:build go1.22
+// +build go1.22
+
+package main
+
+import (
+	"fmt"
+	"io"
+	"math/rand"
+	"net/http"
+	"strconv"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
+)
+
+func rolldice(w http.ResponseWriter, r *http.Request) {
+	ctx, span := tracer.Start(r.Context(), "roll")
+	defer span.End()
+
+	roll := 1 + rand.Intn(6)
+
+	var msg string
+	if player := r.PathValue("player"); player != "" {
+		msg = fmt.Sprintf("%s is rolling the dice", player)
+	} else {
+		msg = "Anonymous player is rolling the dice"
+	}
+	logger.InfoContext(ctx, msg, "result", roll)
+
+	rollValueAttr := attribute.Int("roll.value", roll)
+	span.SetAttributes(rollValueAttr)
+	rollCnt.Add(ctx, 1, metric.WithAttributes(rollValueAttr))
+
+	resp := strconv.Itoa(roll) + "\n"
+	if _, err := io.WriteString(w, resp); err != nil {
+		logger.ErrorContext(ctx, "Write failed", "error", err)
+	}
+}