Add RPC semantic convention stability infrastructure (open-telemetry#16112)

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>
Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>

Author: zeitlinger

instrumentation-api-incubator/build.gradle.kts

@@ -91,14 +91,14 @@ tasks {
   val testStableSemconv by registering(Test::class) {
     testClassesDirs = sourceSets.test.get().output.classesDirs
     classpath = sourceSets.test.get().runtimeClasspath
-    jvmArgs("-Dotel.semconv-stability.opt-in=database,code,service.peer")
+    jvmArgs("-Dotel.semconv-stability.opt-in=database,code,service.peer,rpc")
     inputs.dir(jflexOutputDir)
   }
 
   val testBothSemconv by registering(Test::class) {
     testClassesDirs = sourceSets.test.get().output.classesDirs
     classpath = sourceSets.test.get().runtimeClasspath
-    jvmArgs("-Dotel.semconv-stability.opt-in=database/dup,code/dup,service.peer/dup")
+    jvmArgs("-Dotel.semconv-stability.opt-in=database/dup,code/dup,service.peer/dup,rpc/dup")
     inputs.dir(jflexOutputDir)
   }
 

instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/SemconvStability.java

@@ -27,6 +27,9 @@ public final class SemconvStability {
   private static final boolean emitOldServicePeerSemconv;
   private static final boolean emitStableServicePeerSemconv;
 
+  private static final boolean emitOldRpcSemconv;
+  private static final boolean emitStableRpcSemconv;
+
   static {
     boolean oldDatabase = true;
     boolean stableDatabase = false;
@@ -37,6 +40,9 @@ public final class SemconvStability {
     boolean oldServicePeer = true;
     boolean stableServicePeer = false;
 
+    boolean oldRpc = true;
+    boolean stableRpc = false;
+
     String value = System.getProperty("otel.semconv-stability.opt-in");
     if (value == null) {
       value = System.getenv("OTEL_SEMCONV_STABILITY_OPT_IN");
@@ -73,6 +79,15 @@ public final class SemconvStability {
         oldServicePeer = true;
         stableServicePeer = true;
       }
+
+      if (values.contains("rpc")) {
+        oldRpc = false;
+        stableRpc = true;
+      }
+      if (values.contains("rpc/dup")) {
+        oldRpc = true;
+        stableRpc = true;
+      }
     }
 
     emitOldDatabaseSemconv = oldDatabase;
@@ -83,6 +98,9 @@ public final class SemconvStability {
 
     emitOldServicePeerSemconv = oldServicePeer;
     emitStableServicePeerSemconv = stableServicePeer;
+
+    emitOldRpcSemconv = oldRpc;
+    emitStableRpcSemconv = stableRpc;
   }
 
   public static boolean emitOldDatabaseSemconv() {
@@ -134,5 +152,25 @@ public static boolean isEmitStableCodeSemconv() {
     return emitStableCodeSemconv;
   }
 
+  public static boolean emitOldRpcSemconv() {
+    return emitOldRpcSemconv;
+  }
+
+  public static boolean emitStableRpcSemconv() {
+    return emitStableRpcSemconv;
+  }
+
+  private static final Map<String, String> rpcSystemNameMap = new HashMap<>();
+
+  static {
+    rpcSystemNameMap.put("apache_dubbo", "dubbo");
+    rpcSystemNameMap.put("connect_rpc", "connectrpc");
+  }
+
+  public static String stableRpcSystemName(String oldRpcSystem) {
+    String rpcSystemName = rpcSystemNameMap.get(oldRpcSystem);
+    return rpcSystemName != null ? rpcSystemName : oldRpcSystem;
+  }
+
   private SemconvStability() {}
 }