Java Code Examples for com.google.cloud.pubsub.v1.Publisher#publish()

The following examples show how to use com.google.cloud.pubsub.v1.Publisher#publish() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: Demo.java    From kafka-pubsub-emulator with Apache License 2.0 6 votes vote down vote up 
private void publish(String topic) throws IOException, InterruptedException {
  System.out.println("Publishing messages to " + topic + "...Press Ctrl-C to exit");
  Publisher publisher = Publisher.newBuilder(topic)
      .setCredentialsProvider(new NoCredentialsProvider())
      .setChannelProvider(getChannelProvider())
      .build();
  int messageNo = 1;
  while (true) {
    String message = "Message #" + messageNo++;
    ApiFuture<String> publishFuture = publisher.publish(PubsubMessage.newBuilder()
        .setData(ByteString.copyFromUtf8(message))
        .build());
    ApiFutures.addCallback(publishFuture, new ApiFutureCallback<String>() {
      @Override
      public void onFailure(Throwable throwable) {
        System.err.println("Error publishing " + message);
      }

      @Override
      public void onSuccess(String messageId) {
        System.out.println("Published " + message + " with message-id " + messageId);
      }
    });
    Thread.sleep(SLEEP_1S);
  }
}
Example 2
Source File: PubSubPublish.java    From java-docs-samples with Apache License 2.0 6 votes vote down vote up 
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
    throws IOException, ServletException {
  Publisher publisher = this.publisher;
  try {
    String topicId = System.getenv("PUBSUB_TOPIC");
    // create a publisher on the topic
    if (publisher == null) {
      publisher = Publisher.newBuilder(
          ProjectTopicName.of(ServiceOptions.getDefaultProjectId(), topicId))
          .build();
    }
    // construct a pubsub message from the payload
    final String payload = req.getParameter("payload");
    PubsubMessage pubsubMessage =
        PubsubMessage.newBuilder().setData(ByteString.copyFromUtf8(payload)).build();

    publisher.publish(pubsubMessage);
    // redirect to home page
    resp.sendRedirect("/");
  } catch (Exception e) {
    resp.sendError(HttpStatus.SC_INTERNAL_SERVER_ERROR, e.getMessage());
  }
}
Example 3
Source File: PubsubTopics.java    From gcp-ingestion with Mozilla Public License 2.0 5 votes vote down vote up 
/**
 * Publish a {@link PubsubMessage} to the topic indicated by {@code index}.
 */
public String publish(int index, PubsubMessage message) {
  Publisher publisher = publishers.get(index);
  ApiFuture<String> future = publisher.publish(message);
  publisher.publishAllOutstanding();
  try {
    return future.get();
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}
Example 4
Source File: PubSubPublish.java    From java-docs-samples with Apache License 2.0 5 votes vote down vote up 
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
    throws IOException, ServletException {
  Publisher publisher = this.publisher;
  try {
    String topicId = System.getenv("PUBSUB_TOPIC");
    // create a publisher on the topic
    if (publisher == null) {
      ProjectTopicName topicName =
          ProjectTopicName.newBuilder()
              .setProject(ServiceOptions.getDefaultProjectId())
              .setTopic(topicId)
              .build();
      publisher = Publisher.newBuilder(topicName).build();
    }
    // construct a pubsub message from the payload
    final String payload = req.getParameter("payload");
    PubsubMessage pubsubMessage =
        PubsubMessage.newBuilder().setData(ByteString.copyFromUtf8(payload)).build();

    publisher.publish(pubsubMessage);
    // redirect to home page
    resp.sendRedirect("/");
  } catch (Exception e) {
    resp.sendError(HttpStatus.SC_INTERNAL_SERVER_ERROR, e.getMessage());
  }
}
Example 5
Source File: PubSubPublish.java    From java-docs-samples with Apache License 2.0 5 votes vote down vote up 
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  Publisher publisher = this.publisher;
  // construct a pubsub message from the payload
  final String payload = req.getParameter("payload");
  Message message = new Message(null);
  message.setData(payload);
  PubsubMessage pubsubMessage =
      PubsubMessage.newBuilder().setData(ByteString.copyFromUtf8(payload))
          .putAttributes("sourceLang", req.getParameter("sourceLang"))
          .putAttributes("targetLang", req.getParameter("targetLang"))
          .build();
  String topicId = System.getenv("PUBSUB_TOPIC");
  // create a publisher on the topic
  if (publisher == null) {
    this.publisher = publisher = Publisher.newBuilder(
        ProjectTopicName.newBuilder()
            .setProject(ServiceOptions.getDefaultProjectId())
            .setTopic(topicId)
            .build())
        .build();
  }

  publisher.publish(pubsubMessage);
  // redirect to home page
  resp.sendRedirect("/");
}