Examples with ReaderGroupManagerImpl io.pravega.client.admin.impl.ReaderGroupManagerImpl used on opensource projects

Example 16 with ReaderGroupManagerImpl

use of io.pravega.client.admin.impl.ReaderGroupManagerImpl in project pravega by pravega.

the class EndToEndTruncationTest method testWriteDuringTruncationAndDeletion.

@Test(timeout = 30000)
public void testWriteDuringTruncationAndDeletion() throws Exception {
    StreamConfiguration config = StreamConfiguration.builder().scalingPolicy(ScalingPolicy.byEventRate(10, 2, 2)).build();
    LocalController controller = (LocalController) PRAVEGA.getLocalController();
    String streamName = "testWriteDuringTruncationAndDeletion";
    controller.createScope("test").get();
    controller.createStream("test", streamName, config).get();
    config = StreamConfiguration.builder().scalingPolicy(ScalingPolicy.byEventRate(10, 2, 1)).build();
    controller.updateStream("test", streamName, config).get();
    @Cleanup ConnectionFactory connectionFactory = new SocketConnectionFactoryImpl(ClientConfig.builder().controllerURI(PRAVEGA.getControllerURI()).build());
    @Cleanup ClientFactoryImpl clientFactory = new ClientFactoryImpl("test", controller, connectionFactory);
    @Cleanup EventStreamWriter<String> writer = clientFactory.createEventWriter(streamName, new JavaSerializer<>(), EventWriterConfig.builder().build());
    // routing key "0" translates to key 0.8. This write happens to segment 1.
    writer.writeEvent("0", "truncationTest1").get();
    // scale down to one segment.
    Stream stream = new StreamImpl("test", streamName);
    Map<Double, Double> map = new HashMap<>();
    map.put(0.0, 1.0);
    assertTrue("Stream Scale down", controller.scaleStream(stream, Lists.newArrayList(0L, 1L), map, executorService()).getFuture().get());
    // truncate stream at segment 2, offset 0.
    Map<Long, Long> streamCutPositions = new HashMap<>();
    streamCutPositions.put(computeSegmentId(2, 1), 0L);
    assertTrue("Truncate stream", controller.truncateStream("test", streamName, streamCutPositions).get());
    // routing key "2" translates to key 0.2.
    // this write translates to a write to Segment 0, but since segment 0 is truncated the write should happen on segment 2.
    // write to segment 0
    writer.writeEvent("2", "truncationTest2").get();
    String group = "testWriteDuringTruncationAndDeletion-group";
    @Cleanup ReaderGroupManager groupManager = new ReaderGroupManagerImpl("test", controller, clientFactory);
    groupManager.createReaderGroup(group, ReaderGroupConfig.builder().disableAutomaticCheckpoints().stream("test/" + streamName).build());
    @Cleanup EventStreamReader<String> reader = clientFactory.createReader("readerId", group, new JavaSerializer<>(), ReaderConfig.builder().build());
    EventRead<String> event = reader.readNextEvent(10000);
    assertNotNull(event);
    assertEquals("truncationTest2", event.getEvent());
    // Seal and Delete stream.
    assertTrue(controller.sealStream("test", streamName).get());
    assertTrue(controller.deleteStream("test", streamName).get());
    // write by an existing writer to a deleted stream should complete exceptionally.
    assertFutureThrows("Should throw NoSuchSegmentException", writer.writeEvent("2", "write to deleted stream"), e -> NoSuchSegmentException.class.isAssignableFrom(e.getClass()));
    // subsequent writes will throw an exception to the application.
    assertThrows(RuntimeException.class, () -> writer.writeEvent("test"));
}

Example 17 with ReaderGroupManagerImpl

use of io.pravega.client.admin.impl.ReaderGroupManagerImpl in project pravega by pravega.

the class WriteBatchTest method readWriteTest.

@Test(timeout = 60000)
public void readWriteTest() throws InterruptedException, ExecutionException {
    String scope = "testBatchWrite";
    String readerGroupName = "testBatchWriteRG";
    // 20  readers -> 20 stream segments ( to have max read parallelism)
    ScalingPolicy scalingPolicy = ScalingPolicy.fixed(20);
    StreamConfiguration config = StreamConfiguration.builder().scalingPolicy(scalingPolicy).build();
    ConcurrentLinkedQueue<Long> eventsReadFromPravega = new ConcurrentLinkedQueue<>();
    AtomicLong eventData = new AtomicLong();
    AtomicLong eventReadCount = new AtomicLong();
    AtomicBoolean stopReadFlag = new AtomicBoolean(false);
    ClientConfig clientConfig = ClientConfig.builder().build();
    try (ConnectionPool cp = new ConnectionPoolImpl(clientConfig, new SocketConnectionFactoryImpl(clientConfig));
        StreamManager streamManager = new StreamManagerImpl(controller, cp)) {
        // create a scope
        Boolean createScopeStatus = streamManager.createScope(scope);
        log.info("Create scope status {}", createScopeStatus);
        // create a stream
        Boolean createStreamStatus = streamManager.createStream(scope, STREAM_NAME, config);
        log.info("Create stream status {}", createStreamStatus);
    }
    try (ConnectionFactory connectionFactory = new SocketConnectionFactoryImpl(ClientConfig.builder().build());
        ClientFactoryImpl clientFactory = new ClientFactoryImpl(scope, controller, connectionFactory);
        ReaderGroupManager readerGroupManager = new ReaderGroupManagerImpl(scope, controller, clientFactory)) {
        // start writing events to the stream
        log.info("Creating {} writers", NUM_WRITERS);
        List<CompletableFuture<Void>> writerList = new ArrayList<>();
        for (int i = 0; i < NUM_WRITERS; i++) {
            log.info("Starting writer{}", i);
            writerList.add(startNewWriter(eventData, clientFactory));
        }
        // create a reader group
        log.info("Creating Reader group : {}", readerGroupName);
        readerGroupManager.createReaderGroup(readerGroupName, ReaderGroupConfig.builder().stream(Stream.of(scope, STREAM_NAME)).build());
        log.info("Reader group name {} ", readerGroupManager.getReaderGroup(readerGroupName).getGroupName());
        log.info("Reader group scope {}", readerGroupManager.getReaderGroup(readerGroupName).getScope());
        // create readers
        log.info("Creating {} readers", NUM_READERS);
        List<CompletableFuture<Void>> readerList = new ArrayList<>();
        String readerName = "reader" + RandomFactory.create().nextInt(Integer.MAX_VALUE);
        // start reading events
        for (int i = 0; i < NUM_READERS; i++) {
            log.info("Starting reader{}", i);
            readerList.add(startNewReader(readerName + i, clientFactory, readerGroupName, eventsReadFromPravega, eventData, eventReadCount, stopReadFlag));
        }
        // wait for writers completion
        Futures.allOf(writerList).get();
        // set stop read flag to true
        stopReadFlag.set(true);
        // wait for readers completion
        Futures.allOf(readerList).get();
        ExecutorServiceHelpers.shutdown(writerPool);
        ExecutorServiceHelpers.shutdown(readerPool);
        // delete readergroup
        log.info("Deleting readergroup {}", readerGroupName);
        readerGroupManager.deleteReaderGroup(readerGroupName);
    }
    log.info("All writers have stopped. Setting Stop_Read_Flag. Event Written Count:{}, Event Read " + "Count: {}", eventData.get(), eventsReadFromPravega.size());
    assertEquals(totalNumberOfEvents.get(), eventsReadFromPravega.size());
    // check unique events.
    assertEquals(totalNumberOfEvents.get(), new TreeSet<>(eventsReadFromPravega).size());
    // seal the stream
    CompletableFuture<Boolean> sealStreamStatus = controller.sealStream(scope, STREAM_NAME);
    log.info("Sealing stream {}", STREAM_NAME);
    assertTrue(sealStreamStatus.get());
    // delete the stream
    CompletableFuture<Boolean> deleteStreamStatus = controller.deleteStream(scope, STREAM_NAME);
    log.info("Deleting stream {}", STREAM_NAME);
    assertTrue(deleteStreamStatus.get());
    // delete the  scope
    CompletableFuture<Boolean> deleteScopeStatus = controller.deleteScope(scope);
    log.info("Deleting scope {}", scope);
    assertTrue(deleteScopeStatus.get());
    log.info("Read write test succeeds");
}

Example 18 with ReaderGroupManagerImpl

use of io.pravega.client.admin.impl.ReaderGroupManagerImpl in project pravega by pravega.

the class EventProcessorTest method testEventProcessor.

@Test(timeout = 60000)
public void testEventProcessor() throws Exception {
    final String scope = "controllerScope";
    final String streamName = "stream1";
    final String readerGroup = "readerGroup";
    controller.createScope(scope).join();
    final StreamConfiguration config = StreamConfiguration.builder().scalingPolicy(ScalingPolicy.fixed(1)).build();
    controller.createStream(scope, streamName, config).join();
    eventSerializer = new EventSerializer<>(new TestSerializer());
    @Cleanup ConnectionFactory connectionFactory = new SocketConnectionFactoryImpl(ClientConfig.builder().build());
    @Cleanup ClientFactoryImpl clientFactory = new ClientFactoryImpl(scope, controller, connectionFactory);
    @Cleanup EventStreamWriter<TestEvent> producer = clientFactory.createEventWriter(streamName, eventSerializer, EventWriterConfig.builder().build());
    int[] input = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    int expectedSum = input.length * (input.length + 1) / 2;
    for (int i = 0; i < input.length; i++) {
        producer.writeEvent("key", new TestEvent(input[i]));
    }
    producer.writeEvent("key", new TestEvent(-1));
    producer.flush();
    EventProcessorSystem system = new EventProcessorSystemImpl("Controller", host, scope, clientFactory, new ReaderGroupManagerImpl(scope, controller, clientFactory));
    CheckpointConfig.CheckpointPeriod period = CheckpointConfig.CheckpointPeriod.builder().numEvents(1).numSeconds(1).build();
    CheckpointConfig checkpointConfig = CheckpointConfig.builder().type(CheckpointConfig.Type.Periodic).checkpointPeriod(period).build();
    EventProcessorGroupConfig eventProcessorGroupConfig = EventProcessorGroupConfigImpl.builder().eventProcessorCount(1).readerGroupName(readerGroup).streamName(streamName).checkpointConfig(checkpointConfig).build();
    CompletableFuture<Long> result = new CompletableFuture<>();
    // Test case 1. Actor does not throw any exception during normal operation.
    EventProcessorConfig<TestEvent> eventProcessorConfig = EventProcessorConfig.<TestEvent>builder().supplier(() -> new TestEventProcessor(false, result)).serializer(eventSerializer).decider((Throwable e) -> ExceptionHandler.Directive.Stop).config(eventProcessorGroupConfig).build();
    @Cleanup EventProcessorGroup<TestEvent> eventProcessorGroup = system.createEventProcessorGroup(eventProcessorConfig, CheckpointStoreFactory.createInMemoryStore(), executorService());
    Long value = result.join();
    Assert.assertEquals(expectedSum, value.longValue());
    log.info("SUCCESS: received expected sum = " + expectedSum);
}

Example 19 with ReaderGroupManagerImpl

use of io.pravega.client.admin.impl.ReaderGroupManagerImpl 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());
}

Example 20 with ReaderGroupManagerImpl

use of io.pravega.client.admin.impl.ReaderGroupManagerImpl in project pravega by pravega.

the class ReaderGroupNotificationTest method testSegmentNotifications.

@Test(timeout = 40000)
public void testSegmentNotifications() throws Exception {
    final String streamName = "stream1";
    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();
    @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());
    val notificationResults = new ArrayBlockingQueue<SegmentNotification>(2);
    // Add segment event listener
    Listener<SegmentNotification> l1 = notification -> {
        log.info("Number of Segments: {}, Number of Readers: {}", notification.getNumOfSegments(), notification.getNumOfReaders());
        notificationResults.add(notification);
    };
    SegmentNotifier segmentNotifier = (SegmentNotifier) readerGroup.getSegmentNotifier(executorService());
    segmentNotifier.registerListener(l1);
    // Read first event and validate notification.
    EventRead<String> event1 = reader1.readNextEvent(5000);
    assertEquals("data1", event1.getEvent());
    segmentNotifier.pollNow();
    SegmentNotification initialSegmentNotification = notificationResults.take();
    assertNotNull(initialSegmentNotification);
    assertEquals(1, initialSegmentNotification.getNumOfReaders());
    assertEquals(1, initialSegmentNotification.getNumOfSegments());
    EventRead<String> emptyEvent = reader1.readNextEvent(0);
    assertNull(emptyEvent.getEvent());
    assertFalse(emptyEvent.isCheckpoint());
    readerGroup.initiateCheckpoint("cp", executorService());
    EventRead<String> cpEvent = reader1.readNextEvent(1000);
    assertTrue(cpEvent.isCheckpoint());
    // Read second event and validate notification.
    EventRead<String> event2 = reader1.readNextEvent(10000);
    assertEquals("data2", event2.getEvent());
    segmentNotifier.pollNow();
    SegmentNotification segmentNotificationPostScale = notificationResults.take();
    assertEquals(1, segmentNotificationPostScale.getNumOfReaders());
    assertEquals(2, segmentNotificationPostScale.getNumOfSegments());
}