Examples with EndOfDataNotification io.pravega.client.stream.notifications.EndOfDataNotification used on opensource projects

Example 1 with EndOfDataNotification

use of io.pravega.client.stream.notifications.EndOfDataNotification in project pravega by pravega.

the class EndOfDataNotifier method checkAndTriggerEndOfStreamNotification.

private void checkAndTriggerEndOfStreamNotification() {
    this.synchronizer.fetchUpdates();
    ReaderGroupState state = this.synchronizer.getState();
    if (state == null) {
        log.warn("Current state of StateSynchronizer {} is null, will try again.", synchronizer);
    } else if (state.isEndOfData()) {
        notifySystem.notify(new EndOfDataNotification());
    }
}

Example 2 with EndOfDataNotification

use of io.pravega.client.stream.notifications.EndOfDataNotification in project pravega by pravega.

the class ReaderGroupNotificationTest method testEndOfStreamNotifications.

@Test(timeout = 40000)
public void testEndOfStreamNotifications() throws Exception {
    final String streamName = "stream2";
    StreamConfiguration config = StreamConfiguration.builder().scalingPolicy(ScalingPolicy.fixed(1)).build();
    Controller controller = controllerWrapper.getController();
    controllerWrapper.getControllerService().createScope(SCOPE, 0L).get();
    controller.createStream(SCOPE, streamName, config).get();
    @Cleanup ConnectionFactory connectionFactory = new SocketConnectionFactoryImpl(ClientConfig.builder().controllerURI(URI.create("tcp://localhost")).build());
    @Cleanup ClientFactoryImpl clientFactory = new ClientFactoryImpl(SCOPE, controller, connectionFactory);
    @Cleanup EventStreamWriter<String> writer = clientFactory.createEventWriter(streamName, new JavaSerializer<>(), EventWriterConfig.builder().build());
    writer.writeEvent("0", "data1").get();
    // scale
    Stream stream = new StreamImpl(SCOPE, streamName);
    Map<Double, Double> map = new HashMap<>();
    map.put(0.0, 0.5);
    map.put(0.5, 1.0);
    Boolean result = controller.scaleStream(stream, Collections.singletonList(0L), map, executorService()).getFuture().get();
    assertTrue(result);
    writer.writeEvent("0", "data2").get();
    // seal stream
    assertTrue(controller.sealStream(SCOPE, streamName).get());
    @Cleanup ReaderGroupManager groupManager = new ReaderGroupManagerImpl(SCOPE, controller, clientFactory);
    groupManager.createReaderGroup("reader", ReaderGroupConfig.builder().disableAutomaticCheckpoints().stream(Stream.of(SCOPE, streamName)).groupRefreshTimeMillis(0).build());
    @Cleanup ReaderGroup readerGroup = groupManager.getReaderGroup("reader");
    @Cleanup EventStreamReader<String> reader1 = clientFactory.createReader("readerId", "reader", new JavaSerializer<>(), ReaderConfig.builder().initialAllocationDelay(0).build());
    // Add segment event listener
    Listener<EndOfDataNotification> l1 = notification -> {
        listenerInvoked.set(true);
        listenerLatch.release();
    };
    EndOfDataNotifier endOfDataNotifier = (EndOfDataNotifier) readerGroup.getEndOfDataNotifier(executorService());
    endOfDataNotifier.registerListener(l1);
    EventRead<String> event1 = reader1.readNextEvent(10000);
    assertEquals("data1", event1.getEvent());
    EventRead<String> emptyEvent = reader1.readNextEvent(0);
    assertNull(emptyEvent.getEvent());
    assertFalse(emptyEvent.isCheckpoint());
    readerGroup.initiateCheckpoint("cp", executorService());
    EventRead<String> cpEvent = reader1.readNextEvent(10000);
    assertTrue(cpEvent.isCheckpoint());
    EventRead<String> event2 = reader1.readNextEvent(10000);
    assertEquals("data2", event2.getEvent());
    emptyEvent = reader1.readNextEvent(0);
    assertNull(emptyEvent.getEvent());
    assertFalse(emptyEvent.isCheckpoint());
    emptyEvent = reader1.readNextEvent(0);
    assertNull(emptyEvent.getEvent());
    assertFalse(emptyEvent.isCheckpoint());
    readerGroup.initiateCheckpoint("cp2", executorService());
    cpEvent = reader1.readNextEvent(10000);
    assertTrue(cpEvent.isCheckpoint());
    emptyEvent = reader1.readNextEvent(0);
    assertNull(emptyEvent.getEvent());
    assertFalse(emptyEvent.isCheckpoint());
    endOfDataNotifier.pollNow();
    listenerLatch.await();
    assertTrue("Listener invoked", listenerInvoked.get());
}