Examples with Consumer org.apache.pulsar.client.api.Consumer used on opensource projects

Example 31 with Consumer

use of org.apache.pulsar.client.api.Consumer in project incubator-pulsar by apache.

the class V1_ProducerConsumerTest method testDeactivatingBacklogConsumer.

@Test
public void testDeactivatingBacklogConsumer() throws Exception {
    log.info("-- Starting {} test --", methodName);
    final long batchMessageDelayMs = 100;
    final int receiverSize = 10;
    final String topicName = "cache-topic";
    final String topic = "persistent://my-property/use/my-ns/" + topicName;
    final String sub1 = "faster-sub1";
    final String sub2 = "slower-sub2";
    ConsumerConfiguration conf = new ConsumerConfiguration();
    conf.setSubscriptionType(SubscriptionType.Shared);
    conf.setReceiverQueueSize(receiverSize);
    ProducerConfiguration producerConf = new ProducerConfiguration();
    if (batchMessageDelayMs != 0) {
        producerConf.setBatchingEnabled(true);
        producerConf.setBatchingMaxPublishDelay(batchMessageDelayMs, TimeUnit.MILLISECONDS);
        producerConf.setBatchingMaxMessages(5);
    }
    // 1. Subscriber Faster subscriber: let it consume all messages immediately
    Consumer subscriber1 = pulsarClient.subscribe("persistent://my-property/use/my-ns/" + topicName, sub1, conf);
    // 1.b. Subscriber Slow subscriber:
    conf.setReceiverQueueSize(receiverSize);
    Consumer subscriber2 = pulsarClient.subscribe("persistent://my-property/use/my-ns/" + topicName, sub2, conf);
    Producer producer = pulsarClient.createProducer(topic, producerConf);
    PersistentTopic topicRef = (PersistentTopic) pulsar.getBrokerService().getTopicReference(topic);
    ManagedLedgerImpl ledger = (ManagedLedgerImpl) topicRef.getManagedLedger();
    // reflection to set/get cache-backlog fields value:
    final long maxMessageCacheRetentionTimeMillis = 100;
    Field backlogThresholdField = ManagedLedgerImpl.class.getDeclaredField("maxActiveCursorBacklogEntries");
    backlogThresholdField.setAccessible(true);
    Field field = ManagedLedgerImpl.class.getDeclaredField("maxMessageCacheRetentionTimeMillis");
    field.setAccessible(true);
    Field modifiersField = Field.class.getDeclaredField("modifiers");
    modifiersField.setAccessible(true);
    modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
    field.set(ledger, maxMessageCacheRetentionTimeMillis);
    final long maxActiveCursorBacklogEntries = (long) backlogThresholdField.get(ledger);
    Message msg = null;
    final int totalMsgs = (int) maxActiveCursorBacklogEntries + receiverSize + 1;
    // 2. Produce messages
    for (int i = 0; i < totalMsgs; i++) {
        String message = "my-message-" + i;
        producer.send(message.getBytes());
    }
    // 3. Consume messages: at Faster subscriber
    for (int i = 0; i < totalMsgs; i++) {
        msg = subscriber1.receive(100, TimeUnit.MILLISECONDS);
        subscriber1.acknowledge(msg);
    }
    // wait : so message can be eligible to to be evict from cache
    Thread.sleep(maxMessageCacheRetentionTimeMillis);
    // 4. deactivate subscriber which has built the backlog
    ledger.checkBackloggedCursors();
    Thread.sleep(100);
    // 5. verify: active subscribers
    Set<String> activeSubscriber = Sets.newHashSet();
    ledger.getActiveCursors().forEach(c -> activeSubscriber.add(c.getName()));
    assertTrue(activeSubscriber.contains(sub1));
    assertFalse(activeSubscriber.contains(sub2));
    // 6. consume messages : at slower subscriber
    for (int i = 0; i < totalMsgs; i++) {
        msg = subscriber2.receive(100, TimeUnit.MILLISECONDS);
        subscriber2.acknowledge(msg);
    }
    ledger.checkBackloggedCursors();
    activeSubscriber.clear();
    ledger.getActiveCursors().forEach(c -> activeSubscriber.add(c.getName()));
    assertTrue(activeSubscriber.contains(sub1));
    assertTrue(activeSubscriber.contains(sub2));
}

Example 32 with Consumer

use of org.apache.pulsar.client.api.Consumer in project incubator-pulsar by apache.

the class V1_ProducerConsumerTest method testSendTimeout.

@Test(dataProvider = "batch")
public void testSendTimeout(int batchMessageDelayMs) throws Exception {
    log.info("-- Starting {} test --", methodName);
    ConsumerConfiguration consumerConf = new ConsumerConfiguration();
    consumerConf.setSubscriptionType(SubscriptionType.Exclusive);
    Consumer consumer = pulsarClient.subscribe("persistent://my-property/use/my-ns/my-topic5", "my-subscriber-name", consumerConf);
    ProducerConfiguration producerConf = new ProducerConfiguration();
    if (batchMessageDelayMs != 0) {
        producerConf.setBatchingMaxPublishDelay(2 * batchMessageDelayMs, TimeUnit.MILLISECONDS);
        producerConf.setBatchingMaxMessages(5);
        producerConf.setBatchingEnabled(true);
    }
    producerConf.setSendTimeout(1, TimeUnit.SECONDS);
    Producer producer = pulsarClient.createProducer("persistent://my-property/use/my-ns/my-topic5", producerConf);
    final String message = "my-message";
    // Trigger the send timeout
    stopBroker();
    Future<MessageId> future = producer.sendAsync(message.getBytes());
    try {
        future.get();
        Assert.fail("Send operation should have failed");
    } catch (ExecutionException e) {
    // Expected
    }
    startBroker();
    // We should not have received any message
    Message msg = consumer.receive(3, TimeUnit.SECONDS);
    Assert.assertNull(msg);
    consumer.close();
    log.info("-- Exiting {} test --", methodName);
}

Example 33 with Consumer

use of org.apache.pulsar.client.api.Consumer in project incubator-pulsar by apache.

the class V1_ProducerConsumerTest method testInvalidSequence.

@Test
public void testInvalidSequence() throws Exception {
    log.info("-- Starting {} test --", methodName);
    PulsarClient client1 = PulsarClient.create("http://127.0.0.1:" + BROKER_WEBSERVICE_PORT);
    client1.close();
    ConsumerConfiguration consumerConf = new ConsumerConfiguration();
    consumerConf.setSubscriptionType(SubscriptionType.Exclusive);
    try {
        client1.subscribe("persistent://my-property/use/my-ns/my-topic6", "my-subscriber-name", consumerConf);
        Assert.fail("Should fail");
    } catch (PulsarClientException e) {
        Assert.assertTrue(e instanceof PulsarClientException.AlreadyClosedException);
    }
    try {
        client1.createProducer("persistent://my-property/use/my-ns/my-topic6");
        Assert.fail("Should fail");
    } catch (PulsarClientException e) {
        Assert.assertTrue(e instanceof PulsarClientException.AlreadyClosedException);
    }
    Consumer consumer = pulsarClient.subscribe("persistent://my-property/use/my-ns/my-topic6", "my-subscriber-name", consumerConf);
    try {
        Message msg = MessageBuilder.create().setContent("InvalidMessage".getBytes()).build();
        consumer.acknowledge(msg);
    } catch (PulsarClientException.InvalidMessageException e) {
    // ok
    }
    consumer.close();
    try {
        consumer.receive();
        Assert.fail("Should fail");
    } catch (PulsarClientException.AlreadyClosedException e) {
    // ok
    }
    try {
        consumer.unsubscribe();
        Assert.fail("Should fail");
    } catch (PulsarClientException.AlreadyClosedException e) {
    // ok
    }
    Producer producer = pulsarClient.createProducer("persistent://my-property/use/my-ns/my-topic6");
    producer.close();
    try {
        producer.send("message".getBytes());
        Assert.fail("Should fail");
    } catch (PulsarClientException.AlreadyClosedException e) {
    // ok
    }
}

Example 34 with Consumer

use of org.apache.pulsar.client.api.Consumer in project incubator-pulsar by apache.

the class V1_ProducerConsumerTest method testActiveAndInActiveConsumerEntryCacheBehavior.

/**
 * Usecase 1: Only 1 Active Subscription - 1 subscriber - Produce Messages - EntryCache should cache messages -
 * EntryCache should be cleaned : Once active subscription consumes messages
 *
 * Usecase 2: 2 Active Subscriptions (faster and slower) and slower gets closed - 2 subscribers - Produce Messages -
 * 1 faster-subscriber consumes all messages and another slower-subscriber none - EntryCache should have cached
 * messages as slower-subscriber has not consumed messages yet - close slower-subscriber - EntryCache should be
 * cleared
 *
 * @throws Exception
 */
@Test
public void testActiveAndInActiveConsumerEntryCacheBehavior() throws Exception {
    log.info("-- Starting {} test --", methodName);
    final long batchMessageDelayMs = 100;
    final int receiverSize = 10;
    final String topicName = "cache-topic";
    final String sub1 = "faster-sub1";
    final String sub2 = "slower-sub2";
    ConsumerConfiguration conf = new ConsumerConfiguration();
    conf.setSubscriptionType(SubscriptionType.Shared);
    conf.setReceiverQueueSize(receiverSize);
    ProducerConfiguration producerConf = new ProducerConfiguration();
    if (batchMessageDelayMs != 0) {
        producerConf.setBatchingEnabled(true);
        producerConf.setBatchingMaxPublishDelay(batchMessageDelayMs, TimeUnit.MILLISECONDS);
        producerConf.setBatchingMaxMessages(5);
    }
    /**
     ********** usecase-1: ************
     */
    // 1. Subscriber Faster subscriber
    Consumer subscriber1 = pulsarClient.subscribe("persistent://my-property/use/my-ns/" + topicName, sub1, conf);
    final String topic = "persistent://my-property/use/my-ns/" + topicName;
    Producer producer = pulsarClient.createProducer(topic, producerConf);
    PersistentTopic topicRef = (PersistentTopic) pulsar.getBrokerService().getTopicReference(topic);
    ManagedLedgerImpl ledger = (ManagedLedgerImpl) topicRef.getManagedLedger();
    Field cacheField = ManagedLedgerImpl.class.getDeclaredField("entryCache");
    cacheField.setAccessible(true);
    Field modifiersField = Field.class.getDeclaredField("modifiers");
    modifiersField.setAccessible(true);
    modifiersField.setInt(cacheField, cacheField.getModifiers() & ~Modifier.FINAL);
    EntryCacheImpl entryCache = spy((EntryCacheImpl) cacheField.get(ledger));
    cacheField.set(ledger, entryCache);
    Message msg = null;
    // 2. Produce messages
    for (int i = 0; i < 30; i++) {
        String message = "my-message-" + i;
        producer.send(message.getBytes());
    }
    // 3. Consume messages
    for (int i = 0; i < 30; i++) {
        msg = subscriber1.receive(5, TimeUnit.SECONDS);
        subscriber1.acknowledge(msg);
    }
    // Verify: EntryCache has been invalidated
    verify(entryCache, atLeastOnce()).invalidateEntries(any());
    // sleep for a second: as ledger.updateCursorRateLimit RateLimiter will allow to invoke cursor-update after a
    // second
    // 
    Thread.sleep(1000);
    // produce-consume one more message to trigger : ledger.internalReadFromLedger(..) which updates cursor and
    // EntryCache
    producer.send("message".getBytes());
    msg = subscriber1.receive(5, TimeUnit.SECONDS);
    // Verify: cache has to be cleared as there is no message needs to be consumed by active subscriber
    assertEquals(entryCache.getSize(), 0, 1);
    /**
     ********** usecase-2: ************
     */
    // 1.b Subscriber slower-subscriber
    Consumer subscriber2 = pulsarClient.subscribe("persistent://my-property/use/my-ns/" + topicName, sub2, conf);
    // Produce messages
    final int moreMessages = 10;
    for (int i = 0; i < receiverSize + moreMessages; i++) {
        String message = "my-message-" + i;
        producer.send(message.getBytes());
    }
    // Consume messages
    for (int i = 0; i < receiverSize + moreMessages; i++) {
        msg = subscriber1.receive(5, TimeUnit.SECONDS);
        subscriber1.acknowledge(msg);
    }
    // sleep for a second: as ledger.updateCursorRateLimit RateLimiter will allow to invoke cursor-update after a
    // second
    // 
    Thread.sleep(1000);
    // produce-consume one more message to trigger : ledger.internalReadFromLedger(..) which updates cursor and
    // EntryCache
    producer.send("message".getBytes());
    msg = subscriber1.receive(5, TimeUnit.SECONDS);
    // Verify: as active-subscriber2 has not consumed messages: EntryCache must have those entries in cache
    assertTrue(entryCache.getSize() != 0);
    // 3.b Close subscriber2: which will trigger cache to clear the cache
    subscriber2.close();
    // retry strategically until broker clean up closed subscribers and invalidate all cache entries
    retryStrategically((test) -> entryCache.getSize() == 0, 5, 100);
    // Verify: EntryCache should be cleared
    assertTrue(entryCache.getSize() == 0);
    subscriber1.close();
    log.info("-- Exiting {} test --", methodName);
}

Example 35 with Consumer

use of org.apache.pulsar.client.api.Consumer in project incubator-pulsar by apache.

the class V1_ProducerConsumerTest method testSendBigMessageSizeButCompressed.

/**
 * Verifies non-batch message size being validated after performing compression while batch-messaging validates
 * before compression of message
 *
 * <pre>
 * send msg with size > MAX_SIZE (5 MB)
 * a. non-batch with compression: pass
 * b. batch-msg with compression: fail
 * c. non-batch w/o  compression: fail
 * d. non-batch with compression, consumer consume: pass
 * </pre>
 *
 * @throws Exception
 */
@Test
public void testSendBigMessageSizeButCompressed() throws Exception {
    log.info("-- Starting {} test --", methodName);
    final String topic = "persistent://my-property/use/my-ns/bigMsg";
    // (a) non-batch msg with compression
    ProducerConfiguration producerConf = new ProducerConfiguration();
    producerConf.setCompressionType(CompressionType.LZ4);
    Producer producer = pulsarClient.createProducer(topic, producerConf);
    Message message = MessageBuilder.create().setContent(new byte[PulsarDecoder.MaxMessageSize + 1]).build();
    producer.send(message);
    producer.close();
    // (b) batch-msg
    producerConf = new ProducerConfiguration();
    producerConf.setBatchingEnabled(true);
    producerConf.setCompressionType(CompressionType.LZ4);
    producer = pulsarClient.createProducer(topic, producerConf);
    message = MessageBuilder.create().setContent(new byte[PulsarDecoder.MaxMessageSize + 1]).build();
    try {
        producer.send(message);
        fail("Should have thrown exception");
    } catch (PulsarClientException.InvalidMessageException e) {
    // OK
    }
    producer.close();
    // (c) non-batch msg without compression
    producerConf = new ProducerConfiguration();
    producerConf.setCompressionType(CompressionType.NONE);
    producer = pulsarClient.createProducer(topic, producerConf);
    message = MessageBuilder.create().setContent(new byte[PulsarDecoder.MaxMessageSize + 1]).build();
    try {
        producer.send(message);
        fail("Should have thrown exception");
    } catch (PulsarClientException.InvalidMessageException e) {
    // OK
    }
    producer.close();
    // (d) non-batch msg with compression and try to consume message
    producerConf = new ProducerConfiguration();
    producerConf.setCompressionType(CompressionType.LZ4);
    producer = pulsarClient.createProducer(topic, producerConf);
    Consumer consumer = pulsarClient.subscribe(topic, "sub1");
    byte[] content = new byte[PulsarDecoder.MaxMessageSize + 10];
    message = MessageBuilder.create().setContent(content).build();
    producer.send(message);
    assertEquals(consumer.receive().getData(), content);
    producer.close();
    consumer.close();
}