use of co.cask.cdap.api.messaging.Message in project cdap by caskdata.
the class MapReduceRunnerTestBase method getDataNotifications.
/**
* Returns a list of {@link Notification} object fetched from the data event topic in TMS that was published
* starting from the given time.
*/
protected List<Notification> getDataNotifications(long startTime) throws Exception {
// Get data notifications from TMS
List<Notification> notifications = new ArrayList<>();
MessagingContext messagingContext = new MultiThreadMessagingContext(injector.getInstance(MessagingService.class));
try (CloseableIterator<Message> messages = messagingContext.getMessageFetcher().fetch(NamespaceId.SYSTEM.getNamespace(), injector.getInstance(CConfiguration.class).get(Constants.Dataset.DATA_EVENT_TOPIC), 10, startTime)) {
while (messages.hasNext()) {
notifications.add(GSON.fromJson(new String(messages.next().getPayload(), StandardCharsets.UTF_8), Notification.class));
}
}
return notifications;
}
use of co.cask.cdap.api.messaging.Message in project cdap by caskdata.
the class MessagingApp method fetchMessage.
/**
* Fetch and block until it get a message.
*/
private static Message fetchMessage(MessageFetcher fetcher, String namespace, String topic, @Nullable String afterMessageId, long timeout, TimeUnit unit) throws Exception {
CloseableIterator<Message> iterator = fetcher.fetch(namespace, topic, 1, afterMessageId);
Stopwatch stopwatch = new Stopwatch().start();
try {
while (!iterator.hasNext() && stopwatch.elapsedTime(unit) < timeout) {
TimeUnit.MILLISECONDS.sleep(100);
iterator = fetcher.fetch(namespace, topic, 1, afterMessageId);
}
if (!iterator.hasNext()) {
throw new TimeoutException("Failed to get any messages from " + topic + " in " + timeout + " " + unit.name().toLowerCase());
}
// The payload contains the message to publish in next step
return iterator.next();
} finally {
iterator.close();
}
}
use of co.cask.cdap.api.messaging.Message in project cdap by caskdata.
the class MessagingAppTestRun method testSparkMessaging.
@Test
public void testSparkMessaging() throws Exception {
ApplicationManager appManager = deployWithArtifact(NAMESPACE, MessagingApp.class, artifactJar);
final SparkManager sparkManager = appManager.getSparkManager(MessagingSpark.class.getSimpleName()).start();
final MessageFetcher fetcher = getMessagingContext().getMessageFetcher();
final AtomicReference<String> messageId = new AtomicReference<>();
// Wait for the Spark to create the topic
final MessagingAdmin messagingAdmin = getMessagingAdmin(NAMESPACE.getNamespace());
Tasks.waitFor(true, new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
try {
messagingAdmin.getTopicProperties(MessagingApp.TOPIC);
return true;
} catch (TopicNotFoundException e) {
return false;
}
}
}, 60, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
// This is to verify failed transaction is not publishing anything.
for (String expected : Arrays.asList("start", "block")) {
Tasks.waitFor(expected, new Callable<String>() {
@Override
public String call() throws Exception {
try (CloseableIterator<Message> iterator = fetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, 1, messageId.get())) {
if (!iterator.hasNext()) {
return null;
}
Message message = iterator.next();
messageId.set(message.getId());
return message.getPayloadAsString();
}
}
}, 60, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
}
// Publish a control message to unblock the Spark execution
getMessagingContext().getMessagePublisher().publish(NAMESPACE.getNamespace(), MessagingApp.CONTROL_TOPIC, "go");
// Expects a result message as "result-15", where 15 is the sum of 1,2,3,4,5
Tasks.waitFor("result-15", new Callable<String>() {
@Override
public String call() throws Exception {
try (CloseableIterator<Message> iterator = fetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, 1, messageId.get())) {
if (!iterator.hasNext()) {
return null;
}
Message message = iterator.next();
messageId.set(message.getId());
return message.getPayloadAsString();
}
}
}, 60, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
sparkManager.waitForRun(ProgramRunStatus.COMPLETED, 60, TimeUnit.SECONDS);
}
use of co.cask.cdap.api.messaging.Message 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);
}
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