Examples with PubsubMessage com.google.pubsub.v1.PubsubMessage used on opensource projects

Example 6 with PubsubMessage

use of com.google.pubsub.v1.PubsubMessage in project google-cloud-java by GoogleCloudPlatform.

the class CreateSubscriptionAndConsumeMessages method main.

public static void main(String... args) throws Exception {
    TopicName topic = TopicName.create("my-project-id", "my-topic-id");
    SubscriptionName subscription = SubscriptionName.create("my-project-id", "my-topic-id");
    try (SubscriptionAdminClient subscriptionAdminClient = SubscriptionAdminClient.create()) {
        subscriptionAdminClient.createSubscription(subscription, topic, PushConfig.getDefaultInstance(), 0);
    }
    MessageReceiver receiver = new MessageReceiver() {

        @Override
        public void receiveMessage(PubsubMessage message, AckReplyConsumer consumer) {
            System.out.println("Received message: " + message.getData().toStringUtf8());
            consumer.ack();
        }
    };
    Subscriber subscriber = null;
    try {
        subscriber = Subscriber.defaultBuilder(subscription, receiver).build();
        subscriber.addListener(new Subscriber.Listener() {

            @Override
            public void failed(Subscriber.State from, Throwable failure) {
                // Handle failure. This is called when the Subscriber encountered a fatal error and is shutting down.
                System.err.println(failure);
            }
        }, MoreExecutors.directExecutor());
        subscriber.startAsync().awaitRunning();
        Thread.sleep(60000);
    } finally {
        if (subscriber != null) {
            subscriber.stopAsync();
        }
    }
}

Example 7 with PubsubMessage

use of com.google.pubsub.v1.PubsubMessage in project google-cloud-java by GoogleCloudPlatform.

the class CreateTopicAndPublishMessages method publishMessages.

public static void publishMessages() throws Exception {
    // [START pubsub_publish]
    TopicName topicName = TopicName.create("my-project-id", "my-topic-id");
    Publisher publisher = null;
    List<ApiFuture<String>> messageIdFutures = new ArrayList<>();
    try {
        // Create a publisher instance with default settings bound to the topic
        publisher = Publisher.defaultBuilder(topicName).build();
        List<String> messages = Arrays.asList("first message", "second message");
        // schedule publishing one message at a time : messages get automatically batched
        for (String message : messages) {
            ByteString data = ByteString.copyFromUtf8(message);
            PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build();
            // Once published, returns a server-assigned message id (unique within the topic)
            ApiFuture<String> messageIdFuture = publisher.publish(pubsubMessage);
            messageIdFutures.add(messageIdFuture);
        }
    } finally {
        // wait on any pending publish requests.
        List<String> messageIds = ApiFutures.allAsList(messageIdFutures).get();
        for (String messageId : messageIds) {
            System.out.println("published with message ID: " + messageId);
        }
        if (publisher != null) {
            // When finished with the publisher, shutdown to free up resources.
            publisher.shutdown();
        }
    }
// [END pubsub_publish]
}

Example 8 with PubsubMessage

use of com.google.pubsub.v1.PubsubMessage in project google-cloud-java by GoogleCloudPlatform.

the class PublisherSnippets method publish.

/** Example of publishing a message. */
// [TARGET publish(PubsubMessage)]
// [VARIABLE "my_message"]
public ApiFuture<String> publish(String message) {
    ByteString data = ByteString.copyFromUtf8(message);
    PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build();
    ApiFuture<String> messageIdFuture = publisher.publish(pubsubMessage);
    ApiFutures.addCallback(messageIdFuture, new ApiFutureCallback<String>() {

        public void onSuccess(String messageId) {
            System.out.println("published with message id: " + messageId);
        }

        public void onFailure(Throwable t) {
            System.out.println("failed to publish: " + t);
        }
    });
    return messageIdFuture;
}

Example 9 with PubsubMessage

use of com.google.pubsub.v1.PubsubMessage in project beam by apache.

the class PubsubGrpcClientTest method publishOneMessage.

@Test
public void publishOneMessage() throws IOException {
    String expectedTopic = TOPIC.getPath();
    PubsubMessage expectedPubsubMessage = PubsubMessage.newBuilder().setData(ByteString.copyFrom(DATA.getBytes())).putAllAttributes(ATTRIBUTES).putAllAttributes(ImmutableMap.of(TIMESTAMP_ATTRIBUTE, String.valueOf(MESSAGE_TIME), ID_ATTRIBUTE, RECORD_ID)).build();
    final PublishRequest expectedRequest = PublishRequest.newBuilder().setTopic(expectedTopic).addAllMessages(ImmutableList.of(expectedPubsubMessage)).build();
    final PublishResponse response = PublishResponse.newBuilder().addAllMessageIds(ImmutableList.of(MESSAGE_ID)).build();
    final List<PublishRequest> requestsReceived = new ArrayList<>();
    PublisherImplBase publisherImplBase = new PublisherImplBase() {

        @Override
        public void publish(PublishRequest request, StreamObserver<PublishResponse> responseObserver) {
            requestsReceived.add(request);
            responseObserver.onNext(response);
            responseObserver.onCompleted();
        }
    };
    Server server = InProcessServerBuilder.forName(channelName).addService(publisherImplBase).build().start();
    try {
        OutgoingMessage actualMessage = new OutgoingMessage(DATA.getBytes(), ATTRIBUTES, MESSAGE_TIME, RECORD_ID);
        int n = client.publish(TOPIC, ImmutableList.of(actualMessage));
        assertEquals(1, n);
        assertEquals(expectedRequest, Iterables.getOnlyElement(requestsReceived));
    } finally {
        server.shutdownNow();
    }
}

Example 10 with PubsubMessage

use of com.google.pubsub.v1.PubsubMessage in project google-cloud-java by GoogleCloudPlatform.

the class SubscriberSnippets method createSubscriber.

private void createSubscriber() throws Exception {
    // [START pubsub_pull]
    String projectId = "my-project-id";
    String subscriptionId = "my-subscription-id";
    SubscriptionName subscriptionName = SubscriptionName.create(projectId, subscriptionId);
    // Instantiate an asynchronous message receiver
    MessageReceiver receiver = new MessageReceiver() {

        @Override
        public void receiveMessage(PubsubMessage message, AckReplyConsumer consumer) {
            // handle incoming message, then ack/nack the received message
            System.out.println("Id : " + message.getMessageId());
            System.out.println("Data : " + message.getData().toStringUtf8());
            consumer.ack();
        }
    };
    Subscriber subscriber = null;
    try {
        // Create a subscriber for "my-subscription-id" bound to the message receiver
        subscriber = Subscriber.defaultBuilder(subscriptionName, receiver).build();
        subscriber.startAsync();
    // ...
    } finally {
        // stop receiving messages
        if (subscriber != null) {
            subscriber.stopAsync();
        }
    }
// [END pubsub_pull]
}