public static void main(String... args) throws Exception {
    ProjectSubscriptionName subscription = ProjectSubscriptionName.of("bolcom-stg-jey-streaming-886", "streaming-test");
    MessageReceiver receiver =
            new MessageReceiver() {
                @Override
                public void receiveMessage(PubsubMessage message, AckReplyConsumer consumer) {
                    System.out.println("Received message: " + message.getData().toStringUtf8());
                    //DO NOT ack() or nack() and the subscriber will never stop
                    //consumer.ack();
                }
            };
    Subscriber subscriber = null;
    try {
        subscriber = Subscriber.newBuilder(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();

        // In this example, we will pull messages for one minute (60,000ms) then stop.
        // In a real application, this sleep-then-stop is not necessary.
        // Simply call stopAsync().awaitTerminated() when the server is shutting down, etc.
        Thread.sleep(5000);
    } finally {
        if (subscriber != null) {
            System.out.println("Stopping");
            subscriber.stopAsync().awaitTerminated();
        }
    }
}