add ExtendedOpenTelemetry

Author: zeitlinger

instrumentation/opentelemetry-api/opentelemetry-api-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/opentelemetryapi/ApplicationOpenTelemetry.java

@@ -19,7 +19,10 @@ public class ApplicationOpenTelemetry implements OpenTelemetry {
   public static final OpenTelemetry INSTANCE;
 
   static {
-    OpenTelemetry instance = getOpenTelemetry127();
+    OpenTelemetry instance = getOpenTelemetry155();
+    if (instance == null) {
+      instance = getOpenTelemetry127();
+    }
     if (instance == null) {
       instance = getOpenTelemetry110();
     }
@@ -52,6 +55,19 @@ public ContextPropagators getPropagators() {
     return applicationContextPropagators;
   }
 
+  @Nullable
+  private static OpenTelemetry getOpenTelemetry155() {
+    try {
+      // this class is defined in opentelemetry-api-1.55
+      Class<?> clazz =
+          Class.forName(
+              "io.opentelemetry.javaagent.instrumentation.opentelemetryapi.v1_55.incubator.ApplicationOpenTelemetry155Incubator");
+      return (OpenTelemetry) clazz.getField("INSTANCE").get(null);
+    } catch (ClassNotFoundException | NoSuchFieldException | IllegalAccessException exception) {
+      return null;
+    }
+  }
+
   @Nullable
   private static OpenTelemetry getOpenTelemetry127() {
     try {

instrumentation/opentelemetry-api/opentelemetry-api-1.55/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/opentelemetryapi/v1_55/incubator/ApplicationOpenTelemetry155Incubator.java

@@ -5,6 +5,7 @@
 
 package io.opentelemetry.javaagent.instrumentation.opentelemetryapi.v1_55.incubator;
 
+import application.io.opentelemetry.api.OpenTelemetry;
 import application.io.opentelemetry.api.incubator.ExtendedOpenTelemetry;
 import application.io.opentelemetry.api.incubator.config.ConfigProvider;
 import io.opentelemetry.javaagent.instrumentation.opentelemetryapi.v1_27.ApplicationOpenTelemetry127;
@@ -13,6 +14,10 @@
 public class ApplicationOpenTelemetry155Incubator extends ApplicationOpenTelemetry127
     implements ExtendedOpenTelemetry {
 
+  // Accessed with reflection
+  @SuppressWarnings("unused")
+  public static final OpenTelemetry INSTANCE = new ApplicationOpenTelemetry155Incubator();
+
   private final ConfigProvider configProvider =
       new ApplicationConfigProvider155Incubator(
           ((io.opentelemetry.api.incubator.ExtendedOpenTelemetry)