[Pulsar] Support Pulsar Client send message with transaction.

instrumentation/pulsar/pulsar-2.8/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/pulsar/v2_8/PulsarInstrumentationModule.java

@@ -25,6 +25,7 @@ public List<TypeInstrumentation> typeInstrumentations() {
         new ProducerImplInstrumentation(),
         new MessageInstrumentation(),
         new MessageListenerInstrumentation(),
-        new SendCallbackInstrumentation());
+        new SendCallbackInstrumentation(),
+        new TransactionImplInstrumentation());
   }
 }

instrumentation/pulsar/pulsar-2.8/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/pulsar/v2_8/TransactionImplInstrumentation.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.pulsar.v2_8;
+
+import static net.bytebuddy.matcher.ElementMatchers.isPublic;
+import static net.bytebuddy.matcher.ElementMatchers.named;
+import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
+import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
+
+import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
+import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
+import io.opentelemetry.javaagent.instrumentation.pulsar.v2_8.telemetry.PulsarSingletons;
+import java.util.concurrent.CompletableFuture;
+import net.bytebuddy.asm.Advice;
+import net.bytebuddy.description.type.TypeDescription;
+import net.bytebuddy.matcher.ElementMatcher;
+
+public class TransactionImplInstrumentation implements TypeInstrumentation {
+  @Override
+  public ElementMatcher<TypeDescription> typeMatcher() {
+    return named("org.apache.pulsar.client.impl.transaction.TransactionImpl");
+  }
+
+  @Override
+  public void transform(TypeTransformer transformer) {
+    transformer.applyAdviceToMethod(
+        named("registerProducedTopic")
+            .and(isPublic())
+            .and(takesArguments(1))
+            .and(takesArgument(0, String.class)),
+        TransactionImplInstrumentation.class.getName() + "$RegisterProducedTopicAdvice");
+  }
+
+  @SuppressWarnings("unused")
+  public static class RegisterProducedTopicAdvice {
+
+    @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
+    public static void after(@Advice.Return(readOnly = false) CompletableFuture<Void> future) {
+      future = PulsarSingletons.wrap(future);
+    }
+  }
+}

instrumentation/pulsar/pulsar-2.8/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/pulsar/v2_8/telemetry/PulsarSingletons.java

@@ -210,6 +210,24 @@ private static Context startAndEndConsumerReceive(
         timer.now());
   }
 
+  public static CompletableFuture<Void> wrap(CompletableFuture<Void> future) {
+    Context parent = Context.current();
+    CompletableFuture<Void> result = new CompletableFuture<>();
+    future.whenComplete(
+        (unused, t) ->
+            runWithContext(
+                parent,
+                () -> {
+                  if (t != null) {
+                    result.completeExceptionally(t);
+                  } else {
+                    result.complete(null);
+                  }
+                }));
+
+    return result;
+  }
+
   public static CompletableFuture<Message<?>> wrap(
       CompletableFuture<Message<?>> future, Timer timer, Consumer<?> consumer) {
     boolean listenerContextActive = MessageListenerContext.isProcessing();

instrumentation/pulsar/pulsar-2.8/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/pulsar/v2_8/AbstractPulsarClientTest.java

@@ -89,12 +89,17 @@ static void beforeAll() throws PulsarClientException {
         new PulsarContainer(DEFAULT_IMAGE_NAME)
             .withEnv("PULSAR_MEM", "-Xmx128m")
             .withLogConsumer(new Slf4jLogConsumer(logger))
-            .withStartupTimeout(Duration.ofMinutes(2));
+            .withStartupTimeout(Duration.ofMinutes(2))
+            .withTransactions();
     pulsar.start();
 
     brokerHost = pulsar.getHost();
     brokerPort = pulsar.getMappedPort(6650);
-    client = PulsarClient.builder().serviceUrl(pulsar.getPulsarBrokerUrl()).build();
+    client =
+        PulsarClient.builder()
+            .serviceUrl(pulsar.getPulsarBrokerUrl())
+            .enableTransaction(true)
+            .build();
     admin = PulsarAdmin.builder().serviceHttpUrl(pulsar.getHttpServiceUrl()).build();
   }
 

instrumentation/pulsar/pulsar-2.8/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/pulsar/v2_8/PulsarClientTest.java

@@ -27,6 +27,7 @@
 import org.apache.pulsar.client.api.Messages;
 import org.apache.pulsar.client.api.Schema;
 import org.apache.pulsar.client.api.SubscriptionInitialPosition;
+import org.apache.pulsar.client.api.transaction.Transaction;
 import org.junit.jupiter.api.Test;
 
 class PulsarClientTest extends AbstractPulsarClientTest {
@@ -671,4 +672,30 @@ void testConsumePartitionedTopicUsingBatchReceive() throws Exception {
                               });
                         }));
   }
+
+  @Test
+  void testSendMessageWithTxn() throws Exception {
+    String topic = "persistent://public/default/testSendMessageWithTxn";
+    admin.topics().createNonPartitionedTopic(topic);
+    producer =
+        client
+            .newProducer(Schema.STRING)
+            .topic(topic)
+            .sendTimeout(0, TimeUnit.SECONDS)
+            .enableBatching(false)
+            .create();
+    Transaction transaction =
+        client.newTransaction().withTransactionTimeout(15, TimeUnit.SECONDS).build().get();
+    testing.runWithSpan("parent1", () -> producer.newMessage(transaction).value("test1").send());
+    transaction.commit();
+
+    testing.waitAndAssertTraces(
+        trace ->
+            trace.hasSpansSatisfyingExactly(
+                span -> span.hasName("parent1").hasKind(SpanKind.INTERNAL).hasNoParent(),
+                span ->
+                    span.hasName(topic + " publish")
+                        .hasKind(SpanKind.PRODUCER)
+                        .hasParent(trace.getSpan(0))));
+  }
 }