Add compression configuration to JaegerGrpcSpanExporterBuilder

docs/apidiffs/current_vs_latest/opentelemetry-exporter-jaeger.txt

@@ -1,2 +1,4 @@
 Comparing source compatibility of  against 
-No changes.
+***  MODIFIED CLASS: PUBLIC FINAL io.opentelemetry.exporter.jaeger.JaegerGrpcSpanExporterBuilder  (not serializable)
+	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
+	+++  NEW METHOD: PUBLIC(+) io.opentelemetry.exporter.jaeger.JaegerGrpcSpanExporterBuilder setCompression(java.lang.String)

exporters/jaeger/src/main/java/io/opentelemetry/exporter/jaeger/JaegerGrpcSpanExporterBuilder.java

@@ -66,6 +66,19 @@ public JaegerGrpcSpanExporterBuilder setEndpoint(String endpoint) {
     return this;
   }
 
+  /**
+   * Sets the method used to compress payloads. If unset, compression is disabled. Currently
+   * supported compression methods include "gzip" and "none".
+   */
+  public JaegerGrpcSpanExporterBuilder setCompression(String compressionMethod) {
+    requireNonNull(compressionMethod, "compressionMethod");
+    checkArgument(
+        compressionMethod.equals("gzip") || compressionMethod.equals("none"),
+        "Unsupported compression method. Supported compression methods include: gzip, none.");
+    delegate.setCompression(compressionMethod);
+    return this;
+  }
+
   /**
    * Sets the maximum time to wait for the collector to process an exported batch of spans. If
    * unset, defaults to {@value DEFAULT_TIMEOUT_SECS}s.

exporters/jaeger/src/test/java/io/opentelemetry/exporter/jaeger/JaegerGrpcSpanExporterTest.java

@@ -357,6 +357,57 @@ void invalidConfig() {
     assertThatThrownBy(() -> JaegerGrpcSpanExporter.builder().setEndpoint("gopher://localhost"))
         .isInstanceOf(IllegalArgumentException.class)
         .hasMessage("Invalid endpoint, must start with http:// or https://: gopher://localhost");
+
+    assertThatThrownBy(() -> JaegerGrpcSpanExporter.builder().setCompression(null))
+        .isInstanceOf(NullPointerException.class)
+        .hasMessage("compressionMethod");
+    assertThatThrownBy(() -> JaegerGrpcSpanExporter.builder().setCompression("foo"))
+        .isInstanceOf(IllegalArgumentException.class)
+        .hasMessage(
+            "Unsupported compression method. Supported compression methods include: gzip, none.");
+  }
+
+  @Test
+  void compressionDefault() {
+    JaegerGrpcSpanExporter exporter = JaegerGrpcSpanExporter.builder().build();
+    try {
+      assertThat(exporter).extracting("delegate.compressionEnabled").isEqualTo(false);
+    } finally {
+      exporter.shutdown();
+    }
+  }
+
+  @Test
+  void compressionNone() {
+    JaegerGrpcSpanExporter exporter =
+        JaegerGrpcSpanExporter.builder().setCompression("none").build();
+    try {
+      assertThat(exporter).extracting("delegate.compressionEnabled").isEqualTo(false);
+    } finally {
+      exporter.shutdown();
+    }
+  }
+
+  @Test
+  void compressionGzip() {
+    JaegerGrpcSpanExporter exporter =
+        JaegerGrpcSpanExporter.builder().setCompression("gzip").build();
+    try {
+      assertThat(exporter).extracting("delegate.compressionEnabled").isEqualTo(true);
+    } finally {
+      exporter.shutdown();
+    }
+  }
+
+  @Test
+  void compressionEnabledAndDisabled() {
+    JaegerGrpcSpanExporter exporter =
+        JaegerGrpcSpanExporter.builder().setCompression("gzip").setCompression("none").build();
+    try {
+      assertThat(exporter).extracting("delegate.compressionEnabled").isEqualTo(false);
+    } finally {
+      exporter.shutdown();
+    }
   }
 
   @Test