setMaxInboundMessageSize in Pubsub exmaple (googleapis#3825)

stephenmw · JesseLovelace · commit 7e60bc881311 · 2018-10-19T13:57:37.000-07:00
Pub/Sub may return up to 20MB of data from a single pull request. The default of 4MB is not enough for even one message of maximum size (10MB).
diff --git a/google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/SubscriberSnippets.java b/google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/SubscriberSnippets.java
@@ -192,7 +192,14 @@ static List<ReceivedMessage> createSubscriberWithSyncPull(
       String projectId, String subscriptionId, int numOfMessages) throws Exception {
     // [START pubsub_subscriber_sync_pull]
     SubscriberStubSettings subscriberStubSettings =
-        SubscriberStubSettings.newBuilder().build();
+        SubscriberStubSettings.newBuilder()
+            .setTransportChannelProvider(
+                SubscriberStubSettings.defaultGrpcTransportProviderBuilder()
+                    .setMaxInboundMessageSize(20<<20) // 20MB
+                    .build()
+            )
+            .build();
+
     try (SubscriberStub subscriber = GrpcSubscriberStub.create(subscriberStubSettings)) {
       // String projectId = "my-project-id";
       // String subscriptionId = "my-subscription-id";
