Examples with DequeueResult co.cask.cdap.data2.queue.DequeueResult used on opensource projects

Example 6 with DequeueResult

use of co.cask.cdap.data2.queue.DequeueResult in project cdap by caskdata.

the class StreamConsumerTestBase method testFIFORollback.

@Test
public void testFIFORollback() throws Exception {
    String stream = "testFIFORollback";
    StreamId streamId = TEST_NAMESPACE.stream(stream);
    StreamAdmin streamAdmin = getStreamAdmin();
    streamAdmin.create(streamId);
    StreamConfig streamConfig = streamAdmin.getConfig(streamId);
    // Writes 5 events
    writeEvents(streamConfig, "Testing ", 5);
    streamAdmin.configureInstances(streamId, 0L, 2);
    StreamConsumerFactory consumerFactory = getConsumerFactory();
    StreamConsumer consumer0 = consumerFactory.create(streamId, "fifo.rollback", new ConsumerConfig(0L, 0, 2, DequeueStrategy.FIFO, null));
    StreamConsumer consumer1 = consumerFactory.create(streamId, "fifo.rollback", new ConsumerConfig(0L, 1, 2, DequeueStrategy.FIFO, null));
    // Try to dequeue using both consumers
    TransactionContext context0 = createTxContext(consumer0);
    TransactionContext context1 = createTxContext(consumer1);
    context0.start();
    context1.start();
    DequeueResult<StreamEvent> result0 = consumer0.poll(1, 1, TimeUnit.SECONDS);
    DequeueResult<StreamEvent> result1 = consumer1.poll(1, 1, TimeUnit.SECONDS);
    Assert.assertEquals("Testing 0", Charsets.UTF_8.decode(result0.iterator().next().getBody()).toString());
    Assert.assertEquals("Testing 1", Charsets.UTF_8.decode(result1.iterator().next().getBody()).toString());
    // Commit the first one, rollback the second one.
    context0.finish();
    context1.abort();
    // Dequeue again with the consuemrs
    context0.start();
    context1.start();
    result0 = consumer0.poll(1, 1, TimeUnit.SECONDS);
    result1 = consumer1.poll(1, 1, TimeUnit.SECONDS);
    // Expect consumer 0 keep proceeding while consumer 1 will retry with what it claimed in previous transaction.
    // This is the optimization in FIFO mode to avoid going back and rescanning.
    Assert.assertEquals("Testing 2", Charsets.UTF_8.decode(result0.iterator().next().getBody()).toString());
    Assert.assertEquals("Testing 1", Charsets.UTF_8.decode(result1.iterator().next().getBody()).toString());
    // Commit both
    context0.finish();
    context1.finish();
    consumer0.close();
    consumer1.close();
}

Example 7 with DequeueResult

use of co.cask.cdap.data2.queue.DequeueResult in project cdap by caskdata.

the class StreamConsumerTestBase method testTTL.

@Test
public void testTTL() throws Exception {
    String stream = "testTTL";
    StreamId streamId = TEST_NAMESPACE.stream(stream);
    StreamAdmin streamAdmin = getStreamAdmin();
    // Create stream with ttl of 1 day
    final long ttl = TimeUnit.DAYS.toMillis(1);
    final long currentTime = System.currentTimeMillis();
    final long increment = TimeUnit.SECONDS.toMillis(1);
    final long approxEarliestNonExpiredTime = currentTime - TimeUnit.HOURS.toMillis(1);
    Properties streamProperties = new Properties();
    streamProperties.setProperty(Constants.Stream.TTL, Long.toString(ttl));
    streamProperties.setProperty(Constants.Stream.PARTITION_DURATION, Long.toString(ttl));
    streamAdmin.create(streamId, streamProperties);
    StreamConfig streamConfig = streamAdmin.getConfig(streamId);
    streamAdmin.configureInstances(streamId, 0L, 1);
    StreamConsumerFactory consumerFactory = getConsumerFactory();
    Assert.assertEquals(ttl, streamConfig.getTTL());
    Assert.assertEquals(ttl, streamConfig.getPartitionDuration());
    Set<StreamEvent> expectedEvents = Sets.newTreeSet(STREAM_EVENT_COMPARATOR);
    FileWriter<StreamEvent> writer = getFileWriterFactory().create(streamConfig, 0);
    try {
        // Write 10 expired messages
        writeEvents(streamConfig, "Old event ", 20, new IncrementingClock(0, 1));
        // Write 5 non-expired messages
        expectedEvents.addAll(writeEvents(streamConfig, "New event ", 12, new IncrementingClock(approxEarliestNonExpiredTime, increment)));
    } finally {
        writer.close();
    }
    // Dequeue from stream. Should only get the 5 unexpired events.
    StreamConsumer consumer = consumerFactory.create(streamId, stream, new ConsumerConfig(0L, 0, 1, DequeueStrategy.FIFO, null));
    try {
        verifyEvents(consumer, expectedEvents);
        TransactionContext txContext = createTxContext(consumer);
        txContext.start();
        try {
            // Should be no more pending events
            DequeueResult<StreamEvent> result = consumer.poll(1, 2, TimeUnit.SECONDS);
            Assert.assertTrue(result.isEmpty());
        } finally {
            txContext.finish();
        }
    } finally {
        consumer.close();
    }
}

Example 8 with DequeueResult

use of co.cask.cdap.data2.queue.DequeueResult in project cdap by caskdata.

the class StreamConsumerTestBase method testTTLMultipleEventsWithSameTimestamp.

@Test
public void testTTLMultipleEventsWithSameTimestamp() throws Exception {
    String stream = "testTTLMultipleEventsWithSameTimestamp";
    StreamId streamId = TEST_NAMESPACE.stream(stream);
    StreamAdmin streamAdmin = getStreamAdmin();
    // Create stream with ttl of 1 day
    final long ttl = TimeUnit.DAYS.toMillis(1);
    final long currentTime = System.currentTimeMillis();
    final long increment = TimeUnit.SECONDS.toMillis(1);
    final long approxEarliestNonExpiredTime = currentTime - TimeUnit.HOURS.toMillis(1);
    Properties streamProperties = new Properties();
    streamProperties.setProperty(Constants.Stream.TTL, Long.toString(ttl));
    streamProperties.setProperty(Constants.Stream.PARTITION_DURATION, Long.toString(ttl));
    streamAdmin.create(streamId, streamProperties);
    StreamConfig streamConfig = streamAdmin.getConfig(streamId);
    streamAdmin.configureInstances(streamId, 0L, 1);
    StreamConsumerFactory consumerFactory = getConsumerFactory();
    Assert.assertEquals(ttl, streamConfig.getTTL());
    Assert.assertEquals(ttl, streamConfig.getPartitionDuration());
    // Write 100 expired messages to stream with expired timestamp
    writeEvents(streamConfig, "Old event ", 10, new ConstantClock(0));
    // Write 500 non-expired messages to stream with timestamp approxEarliestNonExpiredTime..currentTime
    Set<StreamEvent> expectedEvents = Sets.newTreeSet(STREAM_EVENT_COMPARATOR);
    FileWriter<StreamEvent> writer = getFileWriterFactory().create(streamConfig, 0);
    try {
        expectedEvents.addAll(writeEvents(writer, "New event pre-flush ", 20, new IncrementingClock(approxEarliestNonExpiredTime, increment, 5)));
        writer.flush();
        expectedEvents.addAll(writeEvents(writer, "New event post-flush ", 20, new IncrementingClock(approxEarliestNonExpiredTime + 1, increment, 5)));
    } finally {
        writer.close();
    }
    StreamConsumer consumer = consumerFactory.create(streamId, stream, new ConsumerConfig(0L, 0, 1, DequeueStrategy.FIFO, null));
    verifyEvents(consumer, expectedEvents);
    TransactionContext txContext = createTxContext(consumer);
    txContext.start();
    try {
        // Should be no more pending events
        DequeueResult<StreamEvent> result = consumer.poll(1, 1, TimeUnit.SECONDS);
        Assert.assertTrue(result.isEmpty());
    } finally {
        txContext.finish();
    }
    consumer.close();
}

Example 9 with DequeueResult

use of co.cask.cdap.data2.queue.DequeueResult in project cdap by caskdata.

the class StreamConsumerTestBase method testFIFOReconfigure.

@Test
public void testFIFOReconfigure() throws Exception {
    String stream = "testReconfigure";
    StreamId streamId = TEST_NAMESPACE.stream(stream);
    StreamAdmin streamAdmin = getStreamAdmin();
    streamAdmin.create(streamId);
    StreamConfig streamConfig = streamAdmin.getConfig(streamId);
    // Writes 5 events
    writeEvents(streamConfig, "Testing ", 5);
    // Configure 3 consumers.
    streamAdmin.configureInstances(streamId, 0L, 3);
    StreamConsumerFactory consumerFactory = getConsumerFactory();
    // Starts three consumers
    List<StreamConsumer> consumers = Lists.newArrayList();
    for (int i = 0; i < 3; i++) {
        consumers.add(consumerFactory.create(streamId, "fifo.reconfigure", new ConsumerConfig(0L, i, 3, DequeueStrategy.FIFO, null)));
    }
    List<TransactionContext> txContexts = Lists.newArrayList();
    for (StreamConsumer consumer : consumers) {
        txContexts.add(createTxContext(consumer));
    }
    for (TransactionContext txContext : txContexts) {
        txContext.start();
    }
    // Consumer an item from each consumer, but only have the first one commit.
    for (int i = 0; i < consumers.size(); i++) {
        DequeueResult<StreamEvent> result = consumers.get(i).poll(1, 1, TimeUnit.SECONDS);
        Assert.assertEquals("Testing " + i, Charsets.UTF_8.decode(result.iterator().next().getBody()).toString());
        if (i == 0) {
            txContexts.get(i).finish();
        } else {
            txContexts.get(i).abort();
        }
    }
    for (StreamConsumer consumer : consumers) {
        consumer.close();
    }
    // Reconfigure to have two consumers.
    streamAdmin.configureInstances(streamId, 0L, 2);
    consumers.clear();
    for (int i = 0; i < 2; i++) {
        consumers.add(consumerFactory.create(streamId, "fifo.reconfigure", new ConsumerConfig(0L, i, 2, DequeueStrategy.FIFO, null)));
    }
    txContexts.clear();
    for (StreamConsumer consumer : consumers) {
        txContexts.add(createTxContext(consumer));
    }
    // Consumer an item from each consumer, they should see all four items.
    Set<String> messages = Sets.newTreeSet();
    boolean done;
    do {
        for (TransactionContext txContext : txContexts) {
            txContext.start();
        }
        done = true;
        for (int i = 0; i < consumers.size(); i++) {
            DequeueResult<StreamEvent> result = consumers.get(i).poll(1, 1, TimeUnit.SECONDS);
            if (result.isEmpty()) {
                continue;
            }
            done = false;
            messages.add(Charsets.UTF_8.decode(result.iterator().next().getBody()).toString());
            txContexts.get(i).finish();
        }
    } while (!done);
    Assert.assertEquals(4, messages.size());
    int count = 1;
    for (String msg : messages) {
        Assert.assertEquals("Testing " + count, msg);
        count++;
    }
    for (StreamConsumer consumer : consumers) {
        consumer.close();
    }
}

Example 10 with DequeueResult

use of co.cask.cdap.data2.queue.DequeueResult in project cdap by caskdata.

the class QueueTest method verifyQueueIsEmpty.

protected void verifyQueueIsEmpty(QueueName queueName, List<ConsumerConfig> consumerConfigs) throws Exception {
    // Verify the queue is empty
    Set<ConsumerGroupConfig> groupConfigs = Sets.newHashSet();
    for (ConsumerConfig consumerConfig : consumerConfigs) {
        try (QueueConsumer consumer = queueClientFactory.createConsumer(queueName, consumerConfig, -1)) {
            groupConfigs.add(new ConsumerGroupConfig(consumerConfig));
            TransactionContext txContext = createTxContext(consumer);
            try {
                txContext.start();
                Assert.assertTrue(consumer.dequeue().isEmpty());
                txContext.finish();
            } catch (TransactionFailureException e) {
                txContext.abort();
                throw Throwables.propagate(e);
            }
        }
    }
    forceEviction(queueName, groupConfigs.size());
    long newGroupId = groupConfigs.size();
    groupConfigs.add(new ConsumerGroupConfig(newGroupId, 1, DequeueStrategy.FIFO, null));
    configureGroups(queueName, groupConfigs);
    // the queue has been consumed by n consumers. Use a consumerId greater than n to make sure it can dequeue.
    ConsumerConfig consumerConfig = new ConsumerConfig(newGroupId, 0, 1, DequeueStrategy.FIFO, null);
    resetConsumerState(queueName, consumerConfig);
    try (QueueConsumer consumer = queueClientFactory.createConsumer(queueName, consumerConfig, -1)) {
        TransactionContext txContext = createTxContext(consumer);
        txContext.start();
        DequeueResult<byte[]> result = consumer.dequeue();
        if (!result.isEmpty()) {
            StringBuilder resultString = new StringBuilder();
            for (byte[] aResult : result) {
                if (resultString.length() > 0) {
                    resultString.append(", ");
                }
                resultString.append(Bytes.toInt(aResult));
            }
            LOG.info("Queue should be empty but returned result: {}, value = ", result, resultString);
        }
        Assert.assertTrue("Entire queue should be evicted after test but dequeue succeeds.", result.isEmpty());
        txContext.abort();
    }
}