Examples with Subscriber com.google.cloud.pubsub.v1.Subscriber used on opensource projects

Example 1 with Subscriber

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

the class ITPubSubTest method testPublishSubscribe.

@Test
public void testPublishSubscribe() throws Exception {
    TopicName topicName = TopicName.create(projectId, formatForTest("testing-publish-subscribe-topic"));
    SubscriptionName subscriptionName = SubscriptionName.create(projectId, formatForTest("testing-publish-subscribe-subscription"));
    topicAdminClient.createTopic(topicName);
    subscriptionAdminClient.createSubscription(subscriptionName, topicName, PushConfig.newBuilder().build(), 10);
    PubsubMessage message = PubsubMessage.newBuilder().setData(ByteString.copyFromUtf8("my message")).build();
    final SettableApiFuture<PubsubMessage> received = SettableApiFuture.create();
    Subscriber subscriber = Subscriber.defaultBuilder(subscriptionName, new MessageReceiver() {

        @Override
        public void receiveMessage(final PubsubMessage message, final AckReplyConsumer consumer) {
            if (received.set(message)) {
                consumer.ack();
            } else {
                consumer.nack();
            }
        }
    }).build();
    subscriber.addListener(new Subscriber.Listener() {

        public void failed(Subscriber.State from, Throwable failure) {
            received.setException(failure);
        }
    }, MoreExecutors.directExecutor());
    subscriber.startAsync();
    Publisher publisher = Publisher.defaultBuilder(topicName).build();
    publisher.publish(message).get();
    publisher.shutdown();
    assertEquals(received.get().getData(), message.getData());
    subscriber.stopAsync().awaitTerminated();
    subscriptionAdminClient.deleteSubscription(subscriptionName);
    topicAdminClient.deleteTopic(topicName);
}

Example 2 with Subscriber

use of com.google.cloud.pubsub.v1.Subscriber 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 3 with Subscriber

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

the class SubscriberSnippets method startAndWait.

// [TARGET startAsync()]
public void startAndWait() throws Exception {
    Subscriber subscriber = Subscriber.defaultBuilder(subscriptionName, receiver).build();
    subscriber.addListener(new Subscriber.Listener() {

        public void failed(Subscriber.State from, Throwable failure) {
        // Handle error.
        }
    }, executor);
    subscriber.startAsync();
    // Wait for a stop signal.
    done.get();
    subscriber.stopAsync().awaitTerminated();
}

Example 4 with Subscriber

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

the class SubscriberSnippets method createSubscriberWithCustomFlowSettings.

private Subscriber createSubscriberWithCustomFlowSettings() throws Exception {
    // [START pubsub_subscriber_flow_settings]
    int maxMessageCount = 10;
    // Configure max number of messages to be pulled
    FlowControlSettings flowControlSettings = FlowControlSettings.newBuilder().setMaxOutstandingElementCount(maxMessageCount).build();
    Subscriber subscriber = Subscriber.defaultBuilder(subscriptionName, receiver).setFlowControlSettings(flowControlSettings).build();
    // [END pubsub_subscriber_flow_settings]
    return subscriber;
}

Example 5 with Subscriber

use of com.google.cloud.pubsub.v1.Subscriber in project spring-cloud-gcp by spring-cloud.

the class DefaultSubscriberFactoryTests method testNewSubscriber.

@Test
public void testNewSubscriber() {
    DefaultSubscriberFactory factory = new DefaultSubscriberFactory(() -> "angeldust");
    factory.setCredentialsProvider(this.credentialsProvider);
    Subscriber subscriber = factory.createSubscriber("midnight cowboy", (message, consumer) -> {
    });
    assertThat(subscriber.getSubscriptionNameString()).isEqualTo("projects/angeldust/subscriptions/midnight cowboy");
}