Pub/Sub: Update ApiFutures.addCallback() to take 3 arguments (#4120)

anguillanneuf · chingor13 · commit 50a853325b30 · 2018-12-03T13:16:06.000-08:00
* Update ApiFutures.addCallback()

* use DirectExecutor

* nit

* use directExecutor

* run formatter
diff --git a/google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/CreateTopicAndPublishMessages.java b/google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/CreateTopicAndPublishMessages.java
@@ -22,6 +22,7 @@
 import com.google.api.gax.rpc.ApiException;
 import com.google.cloud.pubsub.v1.Publisher;
 import com.google.cloud.pubsub.v1.TopicAdminClient;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.protobuf.ByteString;
 import com.google.pubsub.v1.ProjectTopicName;
 import com.google.pubsub.v1.PubsubMessage;
@@ -120,7 +121,8 @@ public void onSuccess(String messageId) {
                 // Once published, returns server-assigned message ids (unique within the topic)
                 System.out.println(messageId);
               }
-            });
+            },
+            MoreExecutors.directExecutor());
       }
     } finally {
       if (publisher != null) {
