Examples with MessagingContext io.cdap.cdap.api.messaging.MessagingContext used on opensource projects

Example 6 with MessagingContext

use of io.cdap.cdap.api.messaging.MessagingContext in project cdap by caskdata.

the class BasicMapReduceTaskContext method getMessagingContext.

@Override
protected MessagingContext getMessagingContext() {
    // Override to have transactional publisher use "store" instead of "payload"
    // since a task is executed with long transaction.
    // The actual publish will be done in the MR driver.
    final MessagingContext context = super.getMessagingContext();
    // TODO: CDAP-7807 Make it available for any topic
    final TopicId allowedTopic = NamespaceId.SYSTEM.topic(cConf.get(Constants.Dataset.DATA_EVENT_TOPIC));
    return new MessagingContext() {

        @Override
        public MessagePublisher getMessagePublisher() {
            return new AbstractMessagePublisher() {

                @Override
                protected void publish(TopicId topicId, Iterator<byte[]> payloads) throws IOException, TopicNotFoundException, UnauthorizedException {
                    if (!allowedTopic.equals(topicId)) {
                        throw new UnsupportedOperationException("Publish to topic '" + topicId.getTopic() + "' is not supported");
                    }
                    // If there is transaction, use storePayload. Otherwise publish without transaction
                    if (transaction == null) {
                        getMessagingService().publish(StoreRequestBuilder.of(topicId).addPayloads(payloads).build());
                    } else {
                        getMessagingService().storePayload(StoreRequestBuilder.of(topicId).setTransaction(transaction.getWritePointer()).addPayloads(payloads).build());
                    }
                }
            };
        }

        @Override
        public MessagePublisher getDirectMessagePublisher() {
            return context.getDirectMessagePublisher();
        }

        @Override
        public MessageFetcher getMessageFetcher() {
            return context.getMessageFetcher();
        }
    };
}

Example 7 with MessagingContext

use of io.cdap.cdap.api.messaging.MessagingContext in project cdap by caskdata.

the class MessagingAppTestRun method testWithWorker.

@Test
public void testWithWorker() throws Exception {
    ApplicationManager appManager = deployWithArtifact(NAMESPACE, MessagingApp.class, artifactJar);
    final WorkerManager workerManager = appManager.getWorkerManager(MessagingApp.MessagingWorker.class.getSimpleName()).start();
    MessagingContext messagingContext = getMessagingContext();
    final MessagingAdmin messagingAdmin = getMessagingAdmin(NAMESPACE);
    // Wait for the worker to create the topic
    Tasks.waitFor(true, new Callable<Boolean>() {

        @Override
        public Boolean call() throws Exception {
            try {
                messagingAdmin.getTopicProperties(MessagingApp.TOPIC);
                return true;
            } catch (TopicNotFoundException e) {
                return false;
            }
        }
    }, 5, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
    // Publish a message
    String message = "message";
    MessagePublisher messagePublisher = messagingContext.getMessagePublisher();
    messagePublisher.publish(NAMESPACE.getNamespace(), MessagingApp.TOPIC, message);
    // The worker will publish back a message with payload as concat(message, message)
    final MessageFetcher messageFetcher = messagingContext.getMessageFetcher();
    Tasks.waitFor(message + message, new Callable<String>() {

        @Override
        public String call() throws Exception {
            try (CloseableIterator<Message> iterator = messageFetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, Integer.MAX_VALUE, 0L)) {
                Message message = Iterators.getLast(iterator, null);
                return message == null ? null : message.getPayloadAsString();
            }
        }
    }, 5, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
    // Publish concat(message + message) to the app
    messagePublisher.publish(NAMESPACE.getNamespace(), MessagingApp.TOPIC, message + message);
    // timeout.
    try {
        Tasks.waitFor(message + message + message + message, new Callable<String>() {

            @Override
            public String call() throws Exception {
                try (CloseableIterator<Message> iterator = messageFetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, Integer.MAX_VALUE, 0L)) {
                    Message message = Iterators.getLast(iterator, null);
                    return message == null ? null : message.getPayloadAsString();
                }
            }
        }, 2, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
        Assert.fail("Expected timeout exception");
    } catch (TimeoutException e) {
    // expected
    }
    // Now publish a message to the control topic, to unblock the transaction block.
    messagePublisher.publish(NAMESPACE.getNamespace(), MessagingApp.CONTROL_TOPIC, message);
    // Should expect a new message as concat(message, message, message, message)
    Tasks.waitFor(message + message + message + message, new Callable<String>() {

        @Override
        public String call() throws Exception {
            try (CloseableIterator<Message> iterator = messageFetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, Integer.MAX_VALUE, 0L)) {
                Message message = Iterators.getLast(iterator, null);
                return message == null ? null : message.getPayloadAsString();
            }
        }
    }, 5, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
    // Wait for the worker to finish and verify that it completes successfully.
    workerManager.waitForRun(ProgramRunStatus.COMPLETED, 5, TimeUnit.SECONDS);
}

Example 8 with MessagingContext

use of io.cdap.cdap.api.messaging.MessagingContext in project cdap by caskdata.

the class RuntimeClientServerTest method assertMessages.

private void assertMessages(TopicId topicId, Collection<Message> messages) throws Exception {
    // Read the messages from TMS and compare
    MessagingContext messagingContext = new MultiThreadMessagingContext(messagingService);
    List<Message> fetchedMessages = new ArrayList<>();
    try (CloseableIterator<Message> iterator = messagingContext.getMessageFetcher().fetch(topicId.getNamespace(), topicId.getTopic(), Integer.MAX_VALUE, null)) {
        iterator.forEachRemaining(fetchedMessages::add);
    }
    Assert.assertEquals(messages.stream().map(Message::getPayloadAsString).collect(Collectors.toList()), fetchedMessages.stream().map(Message::getPayloadAsString).collect(Collectors.toList()));
}

Example 9 with MessagingContext

use of io.cdap.cdap.api.messaging.MessagingContext in project cdap by cdapio.

the class RuntimeClientServerTest method assertMessages.

private void assertMessages(TopicId topicId, Collection<Message> messages) throws Exception {
    // Read the messages from TMS and compare
    MessagingContext messagingContext = new MultiThreadMessagingContext(messagingService);
    List<Message> fetchedMessages = new ArrayList<>();
    try (CloseableIterator<Message> iterator = messagingContext.getMessageFetcher().fetch(topicId.getNamespace(), topicId.getTopic(), Integer.MAX_VALUE, null)) {
        iterator.forEachRemaining(fetchedMessages::add);
    }
    Assert.assertEquals(messages.stream().map(Message::getPayloadAsString).collect(Collectors.toList()), fetchedMessages.stream().map(Message::getPayloadAsString).collect(Collectors.toList()));
}

Example 10 with MessagingContext

use of io.cdap.cdap.api.messaging.MessagingContext in project cdap by cdapio.

the class RuntimeClientServiceTest method testBasicRelay.

@Test
public void testBasicRelay() throws Exception {
    // Send some messages to multiple topics in the client side TMS, they should get replicated to the server side TMS.
    MessagingContext messagingContext = new MultiThreadMessagingContext(clientMessagingService);
    MessagePublisher messagePublisher = messagingContext.getDirectMessagePublisher();
    ProgramStateWriter programStateWriter = new MessagingProgramStateWriter(clientCConf, clientMessagingService);
    for (Map.Entry<String, String> entry : topicConfigs.entrySet()) {
        // the RuntimeClientService will decode it to watch for program termination
        if (entry.getKey().equals(Constants.AppFabric.PROGRAM_STATUS_EVENT_TOPIC)) {
            // Write a non-terminal state to test basic relaying
            programStateWriter.running(PROGRAM_RUN_ID, null);
        } else {
            messagePublisher.publish(NamespaceId.SYSTEM.getNamespace(), entry.getValue(), entry.getKey(), entry.getKey());
        }
    }
    MessagingContext serverMessagingContext = new MultiThreadMessagingContext(messagingService);
    for (Map.Entry<String, String> entry : topicConfigs.entrySet()) {
        if (entry.getKey().equals(Constants.AppFabric.PROGRAM_STATUS_EVENT_TOPIC)) {
            // Extract the program run status from the Notification
            Tasks.waitFor(Collections.singletonList(ProgramRunStatus.RUNNING), () -> fetchMessages(serverMessagingContext, entry.getValue(), 10, null).stream().map(Message::getPayloadAsString).map(s -> GSON.fromJson(s, Notification.class)).map(n -> n.getProperties().get(ProgramOptionConstants.PROGRAM_STATUS)).map(ProgramRunStatus::valueOf).collect(Collectors.toList()), 5, TimeUnit.SECONDS);
        } else {
            Tasks.waitFor(Arrays.asList(entry.getKey(), entry.getKey()), () -> fetchMessages(serverMessagingContext, entry.getValue(), 10, null).stream().map(Message::getPayloadAsString).collect(Collectors.toList()), 5, TimeUnit.SECONDS);
        }
    }
    // Writes a program terminate message to unblock stopping of the client service
    programStateWriter.completed(PROGRAM_RUN_ID);
}