ReactiveEndToEndLatency(Map<String, Object> consumerPropsOverride, Map<String, Object> producerPropsOverride, String bootstrapServers, String topic) { super(consumerPropsOverride, producerPropsOverride, bootstrapServers, topic); sender = KafkaSender.create(SenderOptions.create(producerProps)); ReceiverOptions<byte[], byte[]> receiverOptions = ReceiverOptions.<byte[], byte[]>create(consumerProps) .addAssignListener(partitions -> { if (assignSemaphore.availablePermits() == 0) { partitions.forEach(p -> p.seekToEnd()); assignSemaphore.release(); } }) .subscription(Collections.singleton(topic)); flux = KafkaReceiver.create(receiverOptions) .receive(); receiveQueue = new LinkedBlockingQueue<>(); System.out.println("Running latency test using Reactive API, class=" + this.getClass().getName()); } public void initialize() {
public Disposable consumeMessages(String topic, CountDownLatch latch) { ReceiverOptions<Integer, String> options = receiverOptions.subscription(Collections.singleton(topic)) .addAssignListener(partitions -> log.debug("onPartitionsAssigned {}", partitions)) .addRevokeListener(partitions -> log.debug("onPartitionsRevoked {}", partitions)); Flux<ReceiverRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(options).receive(); return kafkaFlux.subscribe(record -> { ReceiverOffset offset = record.receiverOffset(); System.out.printf("Received message: topic-partition=%s offset=%d timestamp=%s key=%d value=%s\n", offset.topicPartition(), offset.offset(), dateFormat.format(new Date(record.timestamp())), record.key(), record.value()); offset.acknowledge(); latch.countDown(); }); }
public KafkaReceiver<Integer, String> createReceiver() { receiverOptions = receiverOptions.addAssignListener(this::onPartitionsAssigned) .subscription(Collections.singletonList(topic)); return KafkaReceiver.create(receiverOptions); }
public Flux<?> flux() { KafkaSender<Integer, Person> sender = sender(senderOptions()); return KafkaReceiver.create(receiverOptions(Collections.singleton(sourceTopic))) .receiveAtmostOnce() .map(cr -> SenderRecord.create(transform(cr.value()), cr.offset())) .as(sender::send) .doOnCancel(() -> close()); } public ProducerRecord<Integer, Person> transform(Person p) {
public Flux<?> flux() { Scheduler scheduler = Schedulers.newElastic("sample", 60, true); return KafkaReceiver.create(receiverOptions(Collections.singleton(topic)).commitInterval(Duration.ZERO)) .receive() .groupBy(m -> m.receiverOffset().topicPartition()) .flatMap(partitionFlux -> partitionFlux.publishOn(scheduler) .map(r -> processRecord(partitionFlux.key(), r)) .sample(Duration.ofMillis(5000)) .concatMap(offset -> offset.commit())) .doOnCancel(() -> close()); } public ReceiverOffset processRecord(TopicPartition topicPartition, ReceiverRecord<Integer, Person> message) {
private void subscribeToDestTopic(String groupId, String topic, ReceiverOptions<Integer, Person> receiverOptions, List<Person> received) { receiverOptions = receiverOptions .consumerProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest") .consumerProperty(ConsumerConfig.GROUP_ID_CONFIG, groupId) .addAssignListener(partitions -> { log.debug("Group {} assigned {}", groupId, partitions); partitions.forEach(p -> log.trace("Group {} partition {} position {}", groupId, p, p.position())); }) .addRevokeListener(p -> log.debug("Group {} revoked {}", groupId, p)); Disposable c = KafkaReceiver.create(receiverOptions.subscription(Collections.singleton(topic))) .receive() .subscribe(m -> { Person p = m.value(); received.add(p); log.debug("Thread {} Received from {}: {} ", Thread.currentThread().getName(), m.topic(), p); }); disposables.add(c); } private CommittableSource createTestSource(int count, List<Person> expected) {
public Flux<?> flux() { KafkaSender<Integer, Person> sender = sender(senderOptions()); return KafkaReceiver.create(receiverOptions(Collections.singleton(sourceTopic))) .receive() .map(m -> SenderRecord.create(transform(m.value()), m.receiverOffset())) .as(sender::send) .doOnNext(m -> m.correlationMetadata().acknowledge()) .doOnCancel(() -> close()); } public ProducerRecord<Integer, Person> transform(Person p) {
@Test public void manualAssignment() throws Exception { receiverOptions = receiverOptions .assignment(getTopicPartitions()); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive() .doOnSubscribe(s -> assignSemaphore.release()); sendReceiveWithSendDelay(kafkaFlux, Duration.ofMillis(1000), 0, 10); }
@Test public void wildcardSubscribe() throws Exception { receiverOptions = receiverOptions .addAssignListener(this::onPartitionsAssigned) .subscription(Pattern.compile("test.*")); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive(); sendReceive(kafkaFlux, 0, 10, 0, 10); }
public Flux<?> flux() { sender = sender(senderOptions()); EmitterProcessor<Person> processor = EmitterProcessor.create(); FluxSink<Person> incoming = processor.sink(); Flux<?> inFlux = KafkaReceiver.create(receiverOptions(Collections.singleton(sourceTopic))) .receiveAutoAck() .concatMap(r -> r) .doOnNext(m -> incoming.next(m.value())); Flux<SenderResult<Integer>> stream1 = sender.send(processor.publishOn(scheduler1).map(p -> SenderRecord.create(process1(p, true), p.id()))); Flux<SenderResult<Integer>> stream2 = sender.send(processor.publishOn(scheduler2).map(p -> SenderRecord.create(process2(p, true), p.id()))); AtomicReference<Disposable> cancelRef = new AtomicReference<>(); Consumer<AtomicReference<Disposable>> cancel = cr -> { Disposable c = cr.getAndSet(null); if (c != null) c.dispose(); }; return Flux.merge(stream1, stream2) .doOnSubscribe(s -> cancelRef.set(inFlux.subscribe())) .doOnCancel(() -> { cancel.accept(cancelRef); close(); }) .doOnTerminate(() -> close()); } public ProducerRecord<Integer, Person> process1(Person p, boolean debug) {
public Flux<?> flux() { return KafkaReceiver.create(receiverOptions(Collections.singletonList(topic)).commitInterval(Duration.ZERO)) .receive() .publishOn(scheduler) .concatMap(m -> storeInDB(m.value()) .thenEmpty(m.receiverOffset().commit())) .retry() .doOnCancel(() -> close()); } public Mono<Void> storeInDB(Person person) {
@Override public Flux<?> flux() { KafkaSender<Integer, Person> sender = sender(senderOptions()); ReceiverOptions<Integer, Person> receiverOptions = receiverOptions(Collections.singleton(sourceTopic)); KafkaReceiver<Integer, Person> receiver = KafkaReceiver.create(receiverOptions); return receiver.receiveExactlyOnce(sender.transactionManager()) .concatMap(f -> sendAndCommit(f)) .onErrorResume(e -> sender.transactionManager().abort().then(Mono.error(e))) .doOnCancel(() -> close()); } private Flux<SenderResult<Integer>> sendAndCommit(Flux<ConsumerRecord<Integer, Person>> flux) {
@Test public void publishFromEventScheduler() throws Exception { receiverOptions = receiverOptions .schedulerSupplier(Schedulers::immediate) .addAssignListener(this::onPartitionsAssigned) .subscription(Collections.singletonList(topic)); KafkaReceiver<Integer, String> receiver = KafkaReceiver.create(receiverOptions); AtomicReference<String> publishingThreadName = new AtomicReference<>(); CountDownLatch receiveLatch = new CountDownLatch(1); Disposable disposable = receiver.receive() .doOnNext(record -> { publishingThreadName.set(Thread.currentThread().getName()); record.receiverOffset().acknowledge(); receiveLatch.countDown(); }) .subscribe(); subscribeDisposables.add(disposable); waitFoPartitionAssignment(); sendMessages(0, 1); waitForMessages(receiveLatch); assertNotNull(publishingThreadName.get()); assertTrue(publishingThreadName.get().startsWith("reactive-kafka-")); }
@Test public void seekToBeginning() throws Exception { int count = 10; sendMessages(0, count); receiverOptions = receiverOptions .addAssignListener(this::seekToBeginning) .subscription(Collections.singletonList(topic)); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive(); sendReceive(kafkaFlux, count, count, 0, count * 2); }
@Test public void seekToEnd() throws Exception { int count = 10; sendMessages(0, count); receiverOptions = receiverOptions .addAssignListener(partitions -> { for (ReceiverPartition partition : partitions) partition.seekToEnd(); onPartitionsAssigned(partitions); }) .subscription(Collections.singletonList(topic)); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive(); sendReceiveWithSendDelay(kafkaFlux, Duration.ofMillis(100), count, count); }
@Test public void manualAssignmentWithCommit() throws Exception { receiverOptions = receiverOptions.commitInterval(Duration.ZERO) .commitBatchSize(0) .assignment(getTopicPartitions()); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive() .delayUntil(r -> r.receiverOffset().commit()) .doOnSubscribe(s -> assignSemaphore.release()); sendReceiveWithSendDelay(kafkaFlux, Duration.ofMillis(1000), 0, 10); }
@Test public void seekToOffset() throws Exception { int count = 10; sendMessages(0, count); receiverOptions = receiverOptions .addAssignListener(partitions -> { onPartitionsAssigned(partitions); for (ReceiverPartition partition : partitions) partition.seek(1); }) .subscription(Collections.singletonList(topic)); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive() .doOnError(e -> log.error("KafkaFlux exception", e)); sendReceive(kafkaFlux, count, count, partitions, count * 2 - partitions); }
@Test public void autoAckPollWithIntervalWillNotFailOnOverflow() throws Exception { ReceiverOptions<Integer, String> options = receiverOptions.addAssignListener(this::onPartitionsAssigned) .commitInterval(Duration.ofMillis(10)) .subscription(Collections.singletonList(topic)); KafkaReceiver<Integer, String> receiver = KafkaReceiver.create(options); Flux<? extends ConsumerRecord<Integer, String>> kafkaFlux = receiver.receiveAutoAck().concatMap(r -> r); CountDownLatch latch = new CountDownLatch(100); subscribe(kafkaFlux, latch); embeddedKafka.shutdownBroker(brokerId); Thread.sleep(3000); embeddedKafka.startBroker(brokerId); sendMessagesSync(0, 100); waitForMessages(latch); checkConsumedMessages(0, 100); waitForCommits(receiver, 100); }
@Test public void resumeAfterFailure() throws Exception { int count = 20; CountDownLatch receiveLatch = new CountDownLatch(count + 1); receiverOptions = receiverOptions.consumerProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest") .addAssignListener(this::onPartitionsAssigned) .subscription(Collections.singletonList(topic)); KafkaReceiver<Integer, String> receiver = KafkaReceiver.create(receiverOptions); Consumer<ReceiverRecord<Integer, String>> onNext = record -> { receiveLatch.countDown(); onReceive(record); log.info("onNext {}", record.value()); if (receiveLatch.getCount() == 10) throw new RuntimeException("Test exception"); record.receiverOffset().acknowledge(); }; Disposable disposable = receiver.receive() .doOnNext(onNext) .onErrorResume(e -> receiver.receive().doOnNext(onNext)) .subscribe(); subscribeDisposables.add(disposable); waitFoPartitionAssignment(); sendMessages(0, count); waitForMessages(receiveLatch); }
@Test public void manualCommitRecordAsync() throws Exception { int count = 10; CountDownLatch commitLatch = new CountDownLatch(count); long[] committedOffsets = new long[partitions]; receiverOptions = receiverOptions .commitInterval(Duration.ZERO) .commitBatchSize(0) .addAssignListener(this::seekToBeginning) .subscription(Collections.singletonList(topic)); Flux<ReceiverRecord<Integer, String>> kafkaFlux = KafkaReceiver.create(receiverOptions) .receive() .doOnNext(record -> record.receiverOffset() .commit() .doOnSuccess(i -> onCommit(record, commitLatch, committedOffsets)) .doOnError(e -> log.error("Commit exception", e)) .subscribe()); subscribe(kafkaFlux, new CountDownLatch(count)); sendMessages(0, count); checkCommitCallbacks(commitLatch, committedOffsets); }