Examples with StreamCut io.pravega.client.stream.StreamCut used on opensource projects

Example 16 with StreamCut

use of io.pravega.client.stream.StreamCut in project pravega by pravega.

the class BatchClientTest method testBatchClientWithStreamTruncationPostGetSegments.

@Test(expected = TruncatedDataException.class, timeout = 50000)
public void testBatchClientWithStreamTruncationPostGetSegments() throws InterruptedException, ExecutionException {
    @Cleanup EventStreamClientFactory clientFactory = EventStreamClientFactory.withScope(SCOPE, clientConfig);
    createTestStreamWithEvents(clientFactory);
    @Cleanup BatchClientFactory batchClient = BatchClientFactory.withScope(SCOPE, clientConfig);
    // 1. Fetch Segments.
    ArrayList<SegmentRange> segmentsPostTruncation = Lists.newArrayList(batchClient.getSegments(Stream.of(SCOPE, STREAM), StreamCut.UNBOUNDED, StreamCut.UNBOUNDED).getIterator());
    // 2. Create a StreamCut at the end of segment 0 ( offset = 3 * 30 = 90)
    StreamCut streamCut90L = new StreamCutImpl(Stream.of(SCOPE, STREAM), ImmutableMap.of(new Segment(SCOPE, STREAM, 0), 90L));
    // 3. Truncate stream.
    assertTrue("truncate stream", controllerWrapper.getController().truncateStream(SCOPE, STREAM, streamCut90L).join());
    // 4. Use SegmentRange obtained before truncation.
    SegmentRange s0 = segmentsPostTruncation.stream().filter(segmentRange -> segmentRange.getSegmentId() == 0L).findFirst().get();
    // 5. Read non existent segment.
    List<String> eventList = new ArrayList<>();
    @Cleanup SegmentIterator<String> segmentIterator = batchClient.readSegment(s0, serializer);
    eventList.addAll(Lists.newArrayList(segmentIterator));
}

Example 17 with StreamCut

use of io.pravega.client.stream.StreamCut in project pravega by pravega.

the class WatermarkingTest method watermarkingTests.

@Test
public void watermarkingTests() throws Exception {
    final ClientConfig clientConfig = Utils.buildClientConfig(controllerURI);
    @Cleanup ConnectionFactory connectionFactory = new SocketConnectionFactoryImpl(clientConfig);
    ControllerImpl controller = new ControllerImpl(ControllerImplConfig.builder().clientConfig(clientConfig).build(), connectionFactory.getInternalExecutor());
    // create 2 writers
    @Cleanup EventStreamClientFactory clientFactory = EventStreamClientFactory.withScope(SCOPE, clientConfig);
    JavaSerializer<Long> javaSerializer = new JavaSerializer<>();
    @Cleanup EventStreamWriter<Long> writer1 = clientFactory.createEventWriter(STREAM, javaSerializer, EventWriterConfig.builder().build());
    @Cleanup EventStreamWriter<Long> writer2 = clientFactory.createEventWriter(STREAM, javaSerializer, EventWriterConfig.builder().build());
    AtomicBoolean stopFlag = new AtomicBoolean(false);
    // write events
    writeEvents(writer1, stopFlag);
    writeEvents(writer2, stopFlag);
    // scale the stream several times so that we get complex positions
    Stream streamObj = Stream.of(SCOPE, STREAM);
    scale(controller, streamObj);
    @Cleanup ClientFactoryImpl syncClientFactory = new ClientFactoryImpl(SCOPE, new ControllerImpl(ControllerImplConfig.builder().clientConfig(clientConfig).build(), connectionFactory.getInternalExecutor()), connectionFactory);
    String markStream = NameUtils.getMarkStreamForStream(STREAM);
    RevisionedStreamClient<Watermark> watermarkReader = syncClientFactory.createRevisionedStreamClient(markStream, new WatermarkSerializer(), SynchronizerConfig.builder().build());
    LinkedBlockingQueue<Watermark> watermarks = new LinkedBlockingQueue<>();
    fetchWatermarks(watermarkReader, watermarks, stopFlag);
    AssertExtensions.assertEventuallyEquals(true, () -> watermarks.size() >= 2, 100000);
    // scale down one controller instance.
    Futures.getAndHandleExceptions(controllerInstance.scaleService(1), ExecutionException::new);
    // wait until at least 2 more watermarks are emitted
    AssertExtensions.assertEventuallyEquals(true, () -> watermarks.size() >= 4, 100000);
    stopFlag.set(true);
    Watermark watermark0 = watermarks.take();
    Watermark watermark1 = watermarks.take();
    Watermark watermark2 = watermarks.take();
    Watermark watermark3 = watermarks.take();
    assertTrue(watermark0.getLowerTimeBound() <= watermark0.getUpperTimeBound());
    assertTrue(watermark1.getLowerTimeBound() <= watermark1.getUpperTimeBound());
    assertTrue(watermark2.getLowerTimeBound() <= watermark2.getUpperTimeBound());
    assertTrue(watermark3.getLowerTimeBound() <= watermark3.getUpperTimeBound());
    // verify that watermarks are increasing in time.
    assertTrue(watermark0.getLowerTimeBound() < watermark1.getLowerTimeBound());
    assertTrue(watermark1.getLowerTimeBound() < watermark2.getLowerTimeBound());
    assertTrue(watermark2.getLowerTimeBound() < watermark3.getLowerTimeBound());
    // use watermark as lower and upper bounds.
    Map<Segment, Long> positionMap0 = watermark0.getStreamCut().entrySet().stream().collect(Collectors.toMap(x -> new Segment(SCOPE, STREAM, x.getKey().getSegmentId()), Map.Entry::getValue));
    StreamCut streamCutStart = new StreamCutImpl(streamObj, positionMap0);
    Map<Stream, StreamCut> start = Collections.singletonMap(streamObj, streamCutStart);
    Map<Segment, Long> positionMap2 = watermark2.getStreamCut().entrySet().stream().collect(Collectors.toMap(x -> new Segment(SCOPE, STREAM, x.getKey().getSegmentId()), Map.Entry::getValue));
    StreamCut streamCutEnd = new StreamCutImpl(streamObj, positionMap2);
    Map<Stream, StreamCut> end = Collections.singletonMap(streamObj, streamCutEnd);
    @Cleanup ReaderGroupManager readerGroupManager = new ReaderGroupManagerImpl(SCOPE, controller, syncClientFactory);
    String readerGroup = "rg";
    readerGroupManager.createReaderGroup(readerGroup, ReaderGroupConfig.builder().stream(streamObj).startingStreamCuts(start).endingStreamCuts(end).build());
    // create reader on the stream
    @Cleanup final EventStreamReader<Long> reader = clientFactory.createReader("myreader", readerGroup, javaSerializer, ReaderConfig.builder().build());
    // read events from the reader.
    // verify that events read belong to the bound
    EventRead<Long> event = reader.readNextEvent(10000L);
    AtomicReference<TimeWindow> currentTimeWindow = new AtomicReference<>();
    AssertExtensions.assertEventuallyEquals(true, () -> {
        currentTimeWindow.set(reader.getCurrentTimeWindow(streamObj));
        return currentTimeWindow.get() != null && currentTimeWindow.get().getLowerTimeBound() != null && currentTimeWindow.get().getUpperTimeBound() != null;
    }, 100000);
    log.info("current time window = {}", currentTimeWindow.get());
    while (event.getEvent() != null) {
        Long time = event.getEvent();
        log.info("event read = {}", time);
        event.getPosition();
        assertTrue(time >= currentTimeWindow.get().getLowerTimeBound());
        event = reader.readNextEvent(10000L);
        if (event.isCheckpoint()) {
            event = reader.readNextEvent(10000L);
        }
    }
}

Example 18 with StreamCut

use of io.pravega.client.stream.StreamCut in project pravega by pravega.

the class EndToEndTruncationTest method testSimpleOffsetTruncation.

/**
 * This test checks the basic operation of truncation with offsets. The test first writes two events on a Stream
 * (1 segment) and then truncates the Stream after the first event. We verify that a new reader first gets a
 * TruncatedDataException and then it reads only the second event written, as the first has been truncated.
 *
 * @throws ReinitializationRequiredException If a checkpoint or reset is performed on the reader group.
 */
@Test(timeout = 30000)
public void testSimpleOffsetTruncation() throws ReinitializationRequiredException {
    final String scope = "truncationTests";
    final String streamName = "testSimpleOffsetTruncation";
    final String readerGroupName = "RGTestSimpleOffsetTruncation";
    StreamConfiguration streamConfiguration = StreamConfiguration.builder().scalingPolicy(ScalingPolicy.fixed(1)).build();
    @Cleanup StreamManager streamManager = StreamManager.create(PRAVEGA.getControllerURI());
    streamManager.createScope(scope);
    streamManager.createStream(scope, streamName, streamConfiguration);
    @Cleanup EventStreamClientFactory clientFactory = EventStreamClientFactory.withScope(scope, ClientConfig.builder().controllerURI(PRAVEGA.getControllerURI()).build());
    @Cleanup ReaderGroupManager groupManager = ReaderGroupManager.withScope(scope, PRAVEGA.getControllerURI());
    groupManager.createReaderGroup(readerGroupName, ReaderGroupConfig.builder().disableAutomaticCheckpoints().stream(scope + "/" + streamName).build());
    @Cleanup ReaderGroup readerGroup = groupManager.getReaderGroup(readerGroupName);
    // Write two events to the Stream.
    writeEvents(clientFactory, streamName, 2);
    // Read only the first one.
    @Cleanup EventStreamReader<String> reader = clientFactory.createReader(readerGroupName + "1", readerGroupName, new UTF8StringSerializer(), ReaderConfig.builder().build());
    assertEquals(reader.readNextEvent(5000).getEvent(), "0");
    reader.close();
    // Create a Checkpoint, get StreamCut and truncate the Stream at that point.
    Checkpoint cp = readerGroup.initiateCheckpoint("myCheckpoint", executorService()).join();
    StreamCut streamCut = cp.asImpl().getPositions().values().iterator().next();
    assertTrue(streamManager.truncateStream(scope, streamName, streamCut));
    // Verify that a new reader reads from event 1 onwards.
    final String newReaderGroupName = readerGroupName + "new";
    groupManager.createReaderGroup(newReaderGroupName, ReaderGroupConfig.builder().stream(Stream.of(scope, streamName)).build());
    @Cleanup final EventStreamReader<String> newReader = clientFactory.createReader(newReaderGroupName + "2", newReaderGroupName, new UTF8StringSerializer(), ReaderConfig.builder().build());
    assertEquals("Expected read event: ", "1", newReader.readNextEvent(5000).getEvent());
    assertNull(newReader.readNextEvent(5000).getEvent());
}

Example 19 with StreamCut

use of io.pravega.client.stream.StreamCut in project pravega by pravega.

the class EndToEndTruncationTest method testParallelSegmentOffsetTruncation.

/**
 * This test verifies that truncation works specifying an offset that applies to multiple segments. To this end,
 * the test first writes a set of events on a Stream (with multiple segments) and truncates it at a specified offset
 * (truncatedEvents). The tests asserts that readers gets a TruncatedDataException after truncation and then it
 * (only) reads the remaining events that have not been truncated.
 */
@Test(timeout = 600000)
public void testParallelSegmentOffsetTruncation() {
    final String scope = "truncationTests";
    final String streamName = "testParallelSegmentOffsetTruncation";
    final int parallelism = 2;
    final int totalEvents = 100;
    final int truncatedEvents = 25;
    StreamConfiguration streamConf = StreamConfiguration.builder().scalingPolicy(ScalingPolicy.fixed(parallelism)).build();
    @Cleanup StreamManager streamManager = StreamManager.create(PRAVEGA.getControllerURI());
    @Cleanup ReaderGroupManager groupManager = ReaderGroupManager.withScope(scope, PRAVEGA.getControllerURI());
    @Cleanup EventStreamClientFactory clientFactory = EventStreamClientFactory.withScope(scope, ClientConfig.builder().controllerURI(PRAVEGA.getControllerURI()).build());
    streamManager.createScope(scope);
    // Test truncation in new and re-created tests.
    for (int i = 0; i < 2; i++) {
        final String readerGroupName = "RGTestParallelSegmentOffsetTruncation" + i;
        streamManager.createStream(scope, streamName, streamConf);
        groupManager.createReaderGroup(readerGroupName, ReaderGroupConfig.builder().disableAutomaticCheckpoints().stream(Stream.of(scope, streamName)).build());
        @Cleanup ReaderGroup readerGroup = groupManager.getReaderGroup(readerGroupName);
        // Write events to the Stream.
        writeEvents(clientFactory, streamName, totalEvents);
        // Instantiate readers to consume from Stream up to truncatedEvents.
        List<CompletableFuture<Integer>> futures = ReadWriteUtils.readEvents(clientFactory, readerGroupName, parallelism, truncatedEvents);
        Futures.allOf(futures).join();
        int eventsReadBeforeTruncation = futures.stream().map(CompletableFuture::join).reduce(Integer::sum).get();
        // Perform truncation on stream segment
        Checkpoint cp = readerGroup.initiateCheckpoint("myCheckpoint" + i, executorService()).join();
        StreamCut streamCut = cp.asImpl().getPositions().values().iterator().next();
        assertTrue(streamManager.truncateStream(scope, streamName, streamCut));
        // Just after the truncation, trying to read the whole stream should raise a TruncatedDataException.
        final String newGroupName = readerGroupName + "new";
        groupManager.createReaderGroup(newGroupName, ReaderGroupConfig.builder().stream(Stream.of(scope, streamName)).build());
        futures = readEvents(clientFactory, newGroupName, parallelism);
        Futures.allOf(futures).join();
        assertEquals("Expected read events: ", totalEvents - eventsReadBeforeTruncation, (int) futures.stream().map(CompletableFuture::join).reduce((a, b) -> a + b).get());
        assertTrue(streamManager.sealStream(scope, streamName));
        assertTrue(streamManager.deleteStream(scope, streamName));
    }
}

Example 20 with StreamCut

use of io.pravega.client.stream.StreamCut in project pravega by pravega.

the class EndToEndReaderGroupTest method testGenerateStreamCutsWithScaling.

@Test(timeout = 40000)
public void testGenerateStreamCutsWithScaling() throws Exception {
    String streamName = "testGenerateStreamCutsWithScaling";
    final Stream stream = Stream.of(SCOPE, streamName);
    final String group = "testGenerateStreamCutsWithScaling-group";
    createScope(SCOPE);
    createStream(SCOPE, streamName, ScalingPolicy.fixed(2));
    @Cleanup EventStreamClientFactory clientFactory = EventStreamClientFactory.withScope(SCOPE, ClientConfig.builder().controllerURI(PRAVEGA.getControllerURI()).build());
    @Cleanup EventStreamWriter<String> writer = clientFactory.createEventWriter(streamName, serializer, EventWriterConfig.builder().build());
    // Prep the stream with data.
    // 1.Write 2 events with event size of 30 to Segment 0.
    writer.writeEvent(keyGenerator.apply("0.1"), getEventData.apply(0)).join();
    writer.writeEvent(keyGenerator.apply("0.1"), getEventData.apply(0)).join();
    // 2. Write 2 events with event size of 30 to Segment 1.
    writer.writeEvent(keyGenerator.apply("0.9"), getEventData.apply(1)).join();
    writer.writeEvent(keyGenerator.apply("0.9"), getEventData.apply(1)).join();
    // 3. Manually scale stream. Split Segment 0 to Segment 2, Segment 3
    Map<Double, Double> newKeyRanges = new HashMap<>();
    newKeyRanges.put(0.0, 0.25);
    newKeyRanges.put(0.25, 0.5);
    newKeyRanges.put(0.5, 1.0);
    scaleStream(streamName, newKeyRanges);
    // 4. Write events to segment 2
    writer.writeEvent(keyGenerator.apply("0.1"), getEventData.apply(2));
    // 5. Write events to segment 3
    writer.writeEvent(keyGenerator.apply("0.3"), getEventData.apply(3));
    // 6. Write events to Segment 1.
    writer.writeEvent(keyGenerator.apply("0.9"), getEventData.apply(1));
    @Cleanup ReaderGroupManager groupManager = ReaderGroupManager.withScope(SCOPE, PRAVEGA.getControllerURI());
    groupManager.createReaderGroup(group, ReaderGroupConfig.builder().disableAutomaticCheckpoints().groupRefreshTimeMillis(200).stream(stream).build());
    ReaderGroup readerGroup = groupManager.getReaderGroup(group);
    // 7. Create two readers and read 1 event from both the readers
    @Cleanup EventStreamReader<String> reader1 = clientFactory.createReader("reader1", group, serializer, ReaderConfig.builder().build());
    @Cleanup EventStreamReader<String> reader2 = clientFactory.createReader("reader2", group, serializer, ReaderConfig.builder().build());
    // 8. Read 1 event from both the readers.
    String reader1Event = reader1.readNextEvent(15000).getEvent();
    String reader2Event = reader2.readNextEvent(15000).getEvent();
    // 9. Read all events from segment 0.
    if (reader1Event.equalsIgnoreCase(getEventData.apply(0))) {
        assertEquals(getEventData.apply(0), reader1.readNextEvent(15000).getEvent());
        assertEquals(getEventData.apply(1), reader2Event);
        readAndVerify(reader2, 1);
    } else {
        assertEquals(getEventData.apply(1), reader1.readNextEvent(15000).getEvent());
        assertEquals(getEventData.apply(0), reader2Event);
        readAndVerify(reader2, 0);
    }
    // Readers see the empty segments
    EventRead<String> data = reader2.readNextEvent(100);
    assertNull(data.getEvent());
    data = reader1.readNextEvent(100);
    assertNull(data.getEvent());
    @Cleanup("shutdown") InlineExecutor backgroundExecutor = new InlineExecutor();
    readerGroup.initiateCheckpoint("cp1", backgroundExecutor);
    data = reader1.readNextEvent(5000);
    assertEquals("cp1", data.getCheckpointName());
    data = reader2.readNextEvent(5000);
    assertEquals("cp1", data.getCheckpointName());
    // New segments are available to read
    reader1Event = reader1.readNextEvent(5000).getEvent();
    assertNotNull(reader1Event);
    reader2Event = reader2.readNextEvent(5000).getEvent();
    assertNotNull(reader2Event);
    // 10. Generate StreamCuts
    CompletableFuture<Map<Stream, StreamCut>> sc = readerGroup.generateStreamCuts(backgroundExecutor);
    // The reader group state will be updated after 1 second.
    TimeUnit.SECONDS.sleep(1);
    reader1Event = reader1.readNextEvent(500).getEvent();
    reader2Event = reader2.readNextEvent(500).getEvent();
    // 11 Validate the StreamCut generated.
    // wait until the streamCut is obtained.
    assertTrue(Futures.await(sc));
    Set<Segment> expectedSegments = ImmutableSet.<Segment>builder().add(// 1 event read from segment 1
    getSegment(streamName, 4, 1)).add(// 1 event read from segment 2 or 3.
    getSegment(streamName, 2, 1)).add(getSegment(streamName, 3, 1)).build();
    Map<Stream, StreamCut> scMap = sc.join();
    assertEquals("StreamCut for a single stream expected", 1, scMap.size());
    assertEquals(expectedSegments, scMap.get(stream).asImpl().getPositions().keySet());
}