feat: add gcp client attributes in OpenTelemetry traces (#3595)

Author: surbhigarg92

README.md

@@ -41,7 +41,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner</artifactId>
-  <version>6.81.1</version>
+  <version>6.84.0</version>
 </dependency>
 
 ```

google-cloud-spanner/src/main/java/com/google/cloud/spanner/TraceWrapper.java

@@ -16,6 +16,7 @@
 
 package com.google.cloud.spanner;
 
+import com.google.api.gax.core.GaxProperties;
 import com.google.cloud.spanner.Options.TagOption;
 import com.google.cloud.spanner.Options.TransactionOption;
 import com.google.cloud.spanner.SpannerOptions.TracingFramework;
@@ -46,6 +47,12 @@ class TraceWrapper {
   private static final AttributeKey<List<String>> DB_STATEMENT_ARRAY_KEY =
       AttributeKey.stringArrayKey("db.statement");
   private static final AttributeKey<String> DB_TABLE_NAME_KEY = AttributeKey.stringKey("db.table");
+  private static final AttributeKey<String> GCP_CLIENT_SERVICE_KEY =
+      AttributeKey.stringKey("gcp.client.service");
+  private static final AttributeKey<String> GCP_CLIENT_VERSION_KEY =
+      AttributeKey.stringKey("gcp.client.version");
+  private static final AttributeKey<String> GCP_CLIENT_REPO_KEY =
+      AttributeKey.stringKey("gcp.client.repo");
   private static final AttributeKey<String> THREAD_NAME_KEY = AttributeKey.stringKey("thread.name");
 
   private final Tracer openCensusTracer;
@@ -204,6 +211,9 @@ Attributes createCommonAttributes(DatabaseId db) {
     AttributesBuilder builder = Attributes.builder();
     builder.put(DB_NAME_KEY, db.getDatabase());
     builder.put(INSTANCE_NAME_KEY, db.getInstanceId().getInstance());
+    builder.put(GCP_CLIENT_SERVICE_KEY, "spanner");
+    builder.put(GCP_CLIENT_REPO_KEY, "googleapis/java-spanner");
+    builder.put(GCP_CLIENT_VERSION_KEY, GaxProperties.getLibraryVersion(TraceWrapper.class));
     return builder.build();
   }
 

google-cloud-spanner/src/test/java/com/google/cloud/spanner/OpenTelemetrySpanTest.java

@@ -21,6 +21,7 @@
 import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 
+import com.google.api.gax.core.GaxProperties;
 import com.google.api.gax.grpc.testing.LocalChannelProvider;
 import com.google.cloud.NoCredentials;
 import com.google.cloud.spanner.MockSpannerServiceImpl.StatementResult;
@@ -871,6 +872,13 @@ private static void verifySpans(List<String> actualSpanItems, List<String> expec
   private static void verifyCommonAttributes(SpanData span) {
     assertEquals(span.getAttributes().get(AttributeKey.stringKey("instance.name")), "my-instance");
     assertEquals(span.getAttributes().get(AttributeKey.stringKey("db.name")), "my-database");
+    assertEquals(span.getAttributes().get(AttributeKey.stringKey("gcp.client.service")), "spanner");
+    assertEquals(
+        span.getAttributes().get(AttributeKey.stringKey("gcp.client.repo")),
+        "googleapis/java-spanner");
+    assertEquals(
+        span.getAttributes().get(AttributeKey.stringKey("gcp.client.version")),
+        GaxProperties.getLibraryVersion(TraceWrapper.class));
   }
 
   private static void verifyTableAttributes(SpanData span) {