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KAKFA-9503: Fix TopologyTestDriver output order (#8065) 

Migrates TopologyTestDriver processing to be closer to the same processing/ordering
semantics as KafkaStreams. This corrects the output order for recursive topologies
as reported in KAFKA-9503, and also works similarly in the case of task idling.
This commit is contained in:
John Roesler 2020-02-11 21:00:17 -06:00 committed by GitHub
parent cde6d18983
commit 998f1520f9
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 364 additions and 90 deletions
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6
streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamTask.java
View File

@ -444,7 +444,7 @@ public class StreamTask extends AbstractTask implements ProcessorNodePunctuator,
* An active task is processable if its buffer contains data for all of its input
* source topic partitions, or if it is enforced to be processable
*/
private boolean isProcessable(final long wallClockTime) {
public boolean isProcessable(final long wallClockTime) {
if (partitionGroup.allPartitionsBuffered()) {
idleStartTime = RecordQueue.UNKNOWN;
return true;
@ -907,6 +907,10 @@ public class StreamTask extends AbstractTask implements ProcessorNodePunctuator,
}
}
public boolean hasRecordsQueued() {
return numBuffered() > 0;
}
// below are visible for testing only
RecordCollector recordCollector() {
return recordCollector;

175
streams/test-utils/src/main/java/org/apache/kafka/streams/TopologyTestDriver.java
View File

@ -43,11 +43,6 @@ import org.apache.kafka.streams.errors.TopologyException;
import org.apache.kafka.streams.internals.KeyValueStoreFacade;
import org.apache.kafka.streams.internals.QuietStreamsConfig;
import org.apache.kafka.streams.internals.WindowStoreFacade;
import org.apache.kafka.streams.processor.internals.ProcessorStateManager;
import org.apache.kafka.streams.processor.internals.RecordCollector;
import org.apache.kafka.streams.processor.internals.RecordCollectorImpl;
import org.apache.kafka.streams.processor.internals.Task;
import org.apache.kafka.streams.processor.internals.metrics.TaskMetrics;
import org.apache.kafka.streams.processor.ProcessorContext;
import org.apache.kafka.streams.processor.PunctuationType;
import org.apache.kafka.streams.processor.Punctuator;
@ -62,11 +57,16 @@ import org.apache.kafka.streams.processor.internals.InternalProcessorContext;
import org.apache.kafka.streams.processor.internals.InternalTopologyBuilder;
import org.apache.kafka.streams.processor.internals.ProcessorContextImpl;
import org.apache.kafka.streams.processor.internals.ProcessorRecordContext;
import org.apache.kafka.streams.processor.internals.ProcessorStateManager;
import org.apache.kafka.streams.processor.internals.ProcessorTopology;
import org.apache.kafka.streams.processor.internals.RecordCollector;
import org.apache.kafka.streams.processor.internals.RecordCollectorImpl;
import org.apache.kafka.streams.processor.internals.StateDirectory;
import org.apache.kafka.streams.processor.internals.StoreChangelogReader;
import org.apache.kafka.streams.processor.internals.StreamTask;
import org.apache.kafka.streams.processor.internals.Task;
import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
import org.apache.kafka.streams.processor.internals.metrics.TaskMetrics;
import org.apache.kafka.streams.state.KeyValueStore;
import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
import org.apache.kafka.streams.state.ReadOnlySessionStore;
@ -213,9 +213,9 @@ public class TopologyTestDriver implements Closeable {
private final MockProducer<byte[], byte[]> producer;
private final Set<String> internalTopics = new HashSet<>();
private final Map<String, TopicPartition> partitionsByTopic = new HashMap<>();
private final Map<String, TopicPartition> globalPartitionsByTopic = new HashMap<>();
private final Map<TopicPartition, AtomicLong> offsetsByTopicPartition = new HashMap<>();
private final Map<String, TopicPartition> partitionsByInputTopic = new HashMap<>();
private final Map<String, TopicPartition> globalPartitionsByInputTopic = new HashMap<>();
private final Map<TopicPartition, AtomicLong> offsetsByTopicOrPatternPartition = new HashMap<>();
private final Map<String, Queue<ProducerRecord<byte[], byte[]>>> outputRecordsByTopic = new HashMap<>();
private final boolean eosEnabled;
@ -287,6 +287,7 @@ public class TopologyTestDriver implements Closeable {
final Properties config,
final long initialWallClockTimeMs) {
final StreamsConfig streamsConfig = new QuietStreamsConfig(config);
logIfTaskIdleEnabled(streamsConfig);
mockWallClockTime = new MockTime(initialWallClockTimeMs);
internalTopologyBuilder = builder;
@ -334,16 +335,16 @@ public class TopologyTestDriver implements Closeable {
for (final String topic : processorTopology.sourceTopics()) {
final TopicPartition tp = new TopicPartition(topic, PARTITION_ID);
partitionsByTopic.put(topic, tp);
offsetsByTopicPartition.put(tp, new AtomicLong());
partitionsByInputTopic.put(topic, tp);
offsetsByTopicOrPatternPartition.put(tp, new AtomicLong());
}
consumer.assign(partitionsByTopic.values());
consumer.assign(partitionsByInputTopic.values());
if (globalTopology != null) {
for (final String topicName : globalTopology.sourceTopics()) {
final TopicPartition partition = new TopicPartition(topicName, 0);
globalPartitionsByTopic.put(topicName, partition);
offsetsByTopicPartition.put(partition, new AtomicLong());
globalPartitionsByInputTopic.put(topicName, partition);
offsetsByTopicOrPatternPartition.put(partition, new AtomicLong());
consumer.updatePartitions(topicName, Collections.singletonList(
new PartitionInfo(topicName, 0, null, null, null)));
consumer.updateBeginningOffsets(Collections.singletonMap(partition, 0L));
@ -381,11 +382,11 @@ public class TopologyTestDriver implements Closeable {
globalStateTask = null;
}
if (!partitionsByTopic.isEmpty()) {
if (!partitionsByInputTopic.isEmpty()) {
final LogContext logContext = new LogContext("topology-test-driver ");
final ProcessorStateManager stateManager = new ProcessorStateManager(
TASK_ID,
new HashSet<>(partitionsByTopic.values()),
new HashSet<>(partitionsByInputTopic.values()),
Task.TaskType.ACTIVE,
stateDirectory,
processorTopology.storeToChangelogTopic(),
@ -405,7 +406,7 @@ public class TopologyTestDriver implements Closeable {
taskId -> producer);
task = new StreamTask(
TASK_ID,
new HashSet<>(partitionsByTopic.values()),
new HashSet<>(partitionsByInputTopic.values()),
processorTopology,
consumer,
streamsConfig,
@ -429,6 +430,20 @@ public class TopologyTestDriver implements Closeable {
eosEnabled = streamsConfig.getString(StreamsConfig.PROCESSING_GUARANTEE_CONFIG).equals(StreamsConfig.EXACTLY_ONCE);
}
private static void logIfTaskIdleEnabled(final StreamsConfig streamsConfig) {
final Long taskIdleTime = streamsConfig.getLong(StreamsConfig.MAX_TASK_IDLE_MS_CONFIG);
if (taskIdleTime > 0) {
log.info("Detected {} config in use with TopologyTestDriver (set to {}ms)." +
" This means you might need to use TopologyTestDriver#advanceWallClockTime()" +
" or enqueue records on all partitions to allow Steams to make progress." +
" TopologyTestDriver will log a message each time it cannot process enqueued" +
" records due to {}.",
StreamsConfig.MAX_TASK_IDLE_MS_CONFIG,
taskIdleTime,
StreamsConfig.MAX_TASK_IDLE_MS_CONFIG);
}
}
/**
* Get read-only handle on global metrics registry.
*
@ -456,26 +471,38 @@ public class TopologyTestDriver implements Closeable {
consumerRecord.headers());
}
private void pipeRecord(final ProducerRecord<byte[], byte[]> record) {
pipeRecord(record.topic(), record.timestamp(), record.key(), record.value(), record.headers());
}
private void pipeRecord(final String topicName,
final Long timestamp,
final long timestamp,
final byte[] key,
final byte[] value,
final Headers headers) {
final TopicPartition inputTopicOrPatternPartition = getInputTopicOrPatternPartition(topicName);
final TopicPartition globalInputTopicPartition = globalPartitionsByInputTopic.get(topicName);
if (!internalTopologyBuilder.sourceTopicNames().isEmpty()) {
validateSourceTopicNameRegexPattern(topicName);
if (inputTopicOrPatternPartition == null && globalInputTopicPartition == null) {
throw new IllegalArgumentException("Unknown topic: " + topicName);
}
final TopicPartition topicPartition = getTopicPartition(topicName);
if (topicPartition != null) {
final long offset = offsetsByTopicPartition.get(topicPartition).incrementAndGet() - 1;
task.addRecords(topicPartition, Collections.singleton(new ConsumerRecord<>(
topicName,
topicPartition.partition(),
offset,
if (inputTopicOrPatternPartition != null) {
enqueueTaskRecord(topicName, inputTopicOrPatternPartition, timestamp, key, value, headers);
completeAllProcessableWork();
}
if (globalInputTopicPartition != null) {
processGlobalRecord(globalInputTopicPartition, timestamp, key, value, headers);
}
}
private void enqueueTaskRecord(final String inputTopic,
final TopicPartition topicOrPatternPartition,
final long timestamp,
final byte[] key,
final byte[] value,
final Headers headers) {
task.addRecords(topicOrPatternPartition, Collections.singleton(new ConsumerRecord<>(
inputTopic,
topicOrPatternPartition.partition(),
offsetsByTopicOrPatternPartition.get(topicOrPatternPartition).incrementAndGet() - 1,
timestamp,
TimestampType.CREATE_TIME,
(long) ConsumerRecord.NULL_CHECKSUM,
@ -484,22 +511,45 @@ public class TopologyTestDriver implements Closeable {
key,
value,
headers)));
}
private void completeAllProcessableWork() {
// for internally triggered processing (like wall-clock punctuations),
// we might have buffered some records to internal topics that need to
// be piped back in to kick-start the processing loop. This is idempotent
// and therefore harmless in the case where all we've done is enqueued an
// input record from the user.
captureOutputsAndReEnqueueInternalResults();
// If the topology only has global tasks, then `task` would be null.
// For this method, it just means there's nothing to do.
if (task != null) {
while (task.hasRecordsQueued() && task.isProcessable(mockWallClockTime.milliseconds())) {
// Process the record ...
task.process(mockWallClockTime.milliseconds());
task.maybePunctuateStreamTime();
task.commit();
captureOutputRecords();
} else {
final TopicPartition globalTopicPartition = globalPartitionsByTopic.get(topicName);
if (globalTopicPartition == null) {
throw new IllegalArgumentException("Unknown topic: " + topicName);
captureOutputsAndReEnqueueInternalResults();
}
final long offset = offsetsByTopicPartition.get(globalTopicPartition).incrementAndGet() - 1;
if (task.hasRecordsQueued()) {
log.info("Due to the {} configuration, there are currently some records" +
" that cannot be processed. Advancing wall-clock time or" +
" enqueuing records on the empty topics will allow" +
" Streams to process more.",
StreamsConfig.MAX_TASK_IDLE_MS_CONFIG);
}
}
}
private void processGlobalRecord(final TopicPartition globalInputTopicPartition,
final long timestamp,
final byte[] key,
final byte[] value,
final Headers headers) {
globalStateTask.update(new ConsumerRecord<>(
globalTopicPartition.topic(),
globalTopicPartition.partition(),
offset,
globalInputTopicPartition.topic(),
globalInputTopicPartition.partition(),
offsetsByTopicOrPatternPartition.get(globalInputTopicPartition).incrementAndGet() - 1,
timestamp,
TimestampType.CREATE_TIME,
(long) ConsumerRecord.NULL_CHECKSUM,
@ -510,8 +560,6 @@ public class TopologyTestDriver implements Closeable {
headers));
globalStateTask.flushState();
}
}
private void validateSourceTopicNameRegexPattern(final String inputRecordTopic) {
for (final String sourceTopicName : internalTopologyBuilder.sourceTopicNames()) {
@ -523,10 +571,14 @@ public class TopologyTestDriver implements Closeable {
}
}
private TopicPartition getTopicPartition(final String topicName) {
final TopicPartition topicPartition = partitionsByTopic.get(topicName);
private TopicPartition getInputTopicOrPatternPartition(final String topicName) {
if (!internalTopologyBuilder.sourceTopicNames().isEmpty()) {
validateSourceTopicNameRegexPattern(topicName);
}
final TopicPartition topicPartition = partitionsByInputTopic.get(topicName);
if (topicPartition == null) {
for (final Map.Entry<String, TopicPartition> entry : partitionsByTopic.entrySet()) {
for (final Map.Entry<String, TopicPartition> entry : partitionsByInputTopic.entrySet()) {
if (Pattern.compile(entry.getKey()).matcher(topicName).matches()) {
return entry.getValue();
}
@ -535,7 +587,7 @@ public class TopologyTestDriver implements Closeable {
return topicPartition;
}
private void captureOutputRecords() {
private void captureOutputsAndReEnqueueInternalResults() {
// Capture all the records sent to the producer ...
final List<ProducerRecord<byte[], byte[]>> output = producer.history();
producer.clear();
@ -548,9 +600,27 @@ public class TopologyTestDriver implements Closeable {
// Forward back into the topology if the produced record is to an internal or a source topic ...
final String outputTopicName = record.topic();
if (internalTopics.contains(outputTopicName) || processorTopology.sourceTopics().contains(outputTopicName)
|| globalPartitionsByTopic.containsKey(outputTopicName)) {
pipeRecord(record);
final TopicPartition inputTopicOrPatternPartition = getInputTopicOrPatternPartition(outputTopicName);
final TopicPartition globalInputTopicPartition = globalPartitionsByInputTopic.get(outputTopicName);
if (inputTopicOrPatternPartition != null) {
enqueueTaskRecord(
outputTopicName,
inputTopicOrPatternPartition,
record.timestamp(),
record.key(),
record.value(),
record.headers());
}
if (globalInputTopicPartition != null) {
processGlobalRecord(
globalInputTopicPartition,
record.timestamp(),
record.key(),
record.value(),
record.headers());
}
}
}
@ -597,7 +667,7 @@ public class TopologyTestDriver implements Closeable {
task.maybePunctuateSystemTime();
task.commit();
}
captureOutputRecords();
completeAllProcessableWork();
}
/**
@ -1009,7 +1079,12 @@ public class TopologyTestDriver implements Closeable {
// ignore
}
}
captureOutputRecords();
completeAllProcessableWork();
if (task != null && task.hasRecordsQueued()) {
log.warn("Found some records that cannot be processed due to the" +
" {} configuration during TopologyTestDriver#close().",
StreamsConfig.MAX_TASK_IDLE_MS_CONFIG);
}
if (!eosEnabled) {
producer.close();
}

194
streams/test-utils/src/test/java/org/apache/kafka/streams/TopologyTestDriverTest.java
View File

@ -33,6 +33,7 @@ import org.apache.kafka.common.utils.SystemTime;
import org.apache.kafka.streams.errors.TopologyException;
import org.apache.kafka.streams.kstream.Consumed;
import org.apache.kafka.streams.kstream.Materialized;
import org.apache.kafka.streams.processor.AbstractProcessor;
import org.apache.kafka.streams.processor.Processor;
import org.apache.kafka.streams.processor.ProcessorContext;
import org.apache.kafka.streams.processor.ProcessorSupplier;
@ -40,6 +41,7 @@ import org.apache.kafka.streams.processor.PunctuationType;
import org.apache.kafka.streams.processor.Punctuator;
import org.apache.kafka.streams.processor.StateStore;
import org.apache.kafka.streams.processor.TaskId;
import org.apache.kafka.streams.processor.To;
import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
import org.apache.kafka.streams.state.KeyValueIterator;
import org.apache.kafka.streams.state.KeyValueStore;
@ -73,6 +75,8 @@ import static org.apache.kafka.common.utils.Utils.mkEntry;
import static org.apache.kafka.common.utils.Utils.mkMap;
import static org.apache.kafka.common.utils.Utils.mkProperties;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
@ -145,7 +149,7 @@ public class TopologyTestDriverTest {
private final String topic;
private final Headers headers;
Record(final ConsumerRecord consumerRecord,
Record(final ConsumerRecord<byte[], byte[]> consumerRecord,
final long newOffset) {
key = consumerRecord.key();
value = consumerRecord.value();
@ -156,7 +160,7 @@ public class TopologyTestDriverTest {
}
Record(final String newTopic,
final TestRecord consumerRecord,
final TestRecord<byte[], byte[]> consumerRecord,
final long newOffset) {
key = consumerRecord.key();
value = consumerRecord.value();
@ -231,7 +235,7 @@ public class TopologyTestDriverTest {
}
}
private final static class MockProcessor implements Processor {
private final static class MockProcessor implements Processor<Object, Object> {
private final Collection<Punctuation> punctuations;
private ProcessorContext context;
@ -266,7 +270,7 @@ public class TopologyTestDriverTest {
private final List<MockProcessor> mockProcessors = new ArrayList<>();
private final class MockProcessorSupplier implements ProcessorSupplier {
private final class MockProcessorSupplier implements ProcessorSupplier<Object, Object> {
private final Collection<Punctuation> punctuations;
private MockProcessorSupplier() {
@ -278,7 +282,7 @@ public class TopologyTestDriverTest {
}
@Override
public Processor get() {
public Processor<Object, Object> get() {
final MockProcessor mockProcessor = new MockProcessor(punctuations);
mockProcessors.add(mockProcessor);
return mockProcessor;
@ -452,7 +456,7 @@ public class TopologyTestDriverTest {
testDriver = new TopologyTestDriver(setupSourceSinkTopology(), config);
pipeRecord(SOURCE_TOPIC_1, testRecord1);
final ProducerRecord outputRecord = testDriver.readRecord(SINK_TOPIC_1);
final ProducerRecord<byte[], byte[]> outputRecord = testDriver.readRecord(SINK_TOPIC_1);
assertEquals(key1, outputRecord.key());
assertEquals(value1, outputRecord.value());
@ -705,7 +709,7 @@ public class TopologyTestDriverTest {
pipeRecord(SOURCE_TOPIC_1, testRecord1);
ProducerRecord outputRecord = testDriver.readRecord(SINK_TOPIC_1);
ProducerRecord<byte[], byte[]> outputRecord = testDriver.readRecord(SINK_TOPIC_1);
assertEquals(key1, outputRecord.key());
assertEquals(value1, outputRecord.value());
assertEquals(SINK_TOPIC_1, outputRecord.topic());
@ -1337,9 +1341,9 @@ public class TopologyTestDriverTest {
topology.addSource("sourceProcessor", "input-topic");
topology.addProcessor(
"storeProcessor",
new ProcessorSupplier() {
new ProcessorSupplier<String, Long>() {
@Override
public Processor get() {
public Processor<String, Long> get() {
return new Processor<String, Long>() {
private KeyValueStore<String, Long> store;
@ -1472,7 +1476,7 @@ public class TopologyTestDriverTest {
testDriver = new TopologyTestDriver(topology, config);
pipeRecord(SOURCE_TOPIC_1, testRecord1);
final ProducerRecord outputRecord = testDriver.readRecord(SINK_TOPIC_1);
final ProducerRecord<byte[], byte[]> outputRecord = testDriver.readRecord(SINK_TOPIC_1);
assertEquals(key1, outputRecord.key());
assertEquals(value1, outputRecord.value());
assertEquals(SINK_TOPIC_1, outputRecord.topic());
@ -1522,4 +1526,174 @@ public class TopologyTestDriverTest {
final TaskId taskId = new TaskId(0, 0);
assertTrue(new File(appDir, taskId.toString()).exists());
}
@Test
public void shouldEnqueueLaterOutputsAfterEarlierOnes() {
final Properties properties = new Properties();
properties.setProperty(StreamsConfig.APPLICATION_ID_CONFIG, "dummy");
properties.setProperty(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "dummy");
final Topology topology = new Topology();
topology.addSource("source", new StringDeserializer(), new StringDeserializer(), "input");
topology.addProcessor(
"recursiveProcessor",
() -> new AbstractProcessor<String, String>() {
@Override
public void process(final String key, final String value) {
if (!value.startsWith("recurse-")) {
context().forward(key, "recurse-" + value, To.child("recursiveSink"));
}
context().forward(key, value, To.child("sink"));
}
},
"source"
);
topology.addSink("recursiveSink", "input", new StringSerializer(), new StringSerializer(), "recursiveProcessor");
topology.addSink("sink", "output", new StringSerializer(), new StringSerializer(), "recursiveProcessor");
try (final TopologyTestDriver topologyTestDriver = new TopologyTestDriver(topology, properties)) {
final TestInputTopic<String, String> in = topologyTestDriver.createInputTopic("input", new StringSerializer(), new StringSerializer());
final TestOutputTopic<String, String> out = topologyTestDriver.createOutputTopic("output", new StringDeserializer(), new StringDeserializer());
// given the topology above, we expect to see the output _first_ echo the input
// and _then_ print it with "recurse-" prepended.
in.pipeInput("B", "beta");
final List<KeyValue<String, String>> events = out.readKeyValuesToList();
assertThat(
events,
is(Arrays.asList(
new KeyValue<>("B", "beta"),
new KeyValue<>("B", "recurse-beta")
))
);
}
}
@Test
public void shouldApplyGlobalUpdatesCorrectlyInRecursiveTopologies() {
final Properties properties = new Properties();
properties.setProperty(StreamsConfig.APPLICATION_ID_CONFIG, "dummy");
properties.setProperty(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "dummy");
final Topology topology = new Topology();
topology.addSource("source", new StringDeserializer(), new StringDeserializer(), "input");
topology.addGlobalStore(
Stores.keyValueStoreBuilder(Stores.inMemoryKeyValueStore("globule-store"), Serdes.String(), Serdes.String()).withLoggingDisabled(),
"globuleSource",
new StringDeserializer(),
new StringDeserializer(),
"globule-topic",
"globuleProcessor",
() -> new Processor<String, String>() {
private KeyValueStore<String, String> stateStore;
@SuppressWarnings("unchecked")
@Override
public void init(final ProcessorContext context) {
stateStore = (KeyValueStore<String, String>) context.getStateStore("globule-store");
}
@Override
public void process(final String key, final String value) {
stateStore.put(key, value);
}
@Override
public void close() {
}
}
);
topology.addProcessor(
"recursiveProcessor",
() -> new AbstractProcessor<String, String>() {
@Override
public void process(final String key, final String value) {
if (!value.startsWith("recurse-")) {
context().forward(key, "recurse-" + value, To.child("recursiveSink"));
}
context().forward(key, value, To.child("sink"));
context().forward(key, value, To.child("globuleSink"));
}
},
"source"
);
topology.addSink("recursiveSink", "input", new StringSerializer(), new StringSerializer(), "recursiveProcessor");
topology.addSink("sink", "output", new StringSerializer(), new StringSerializer(), "recursiveProcessor");
topology.addSink("globuleSink", "globule-topic", new StringSerializer(), new StringSerializer(), "recursiveProcessor");
try (final TopologyTestDriver topologyTestDriver = new TopologyTestDriver(topology, properties)) {
final TestInputTopic<String, String> in = topologyTestDriver.createInputTopic("input", new StringSerializer(), new StringSerializer());
final TestOutputTopic<String, String> globalTopic = topologyTestDriver.createOutputTopic("globule-topic", new StringDeserializer(), new StringDeserializer());
in.pipeInput("A", "alpha");
// expect the global store to correctly reflect the last update
final KeyValueStore<String, String> keyValueStore = topologyTestDriver.getKeyValueStore("globule-store");
assertThat(keyValueStore, notNullValue());
assertThat(keyValueStore.get("A"), is("recurse-alpha"));
// and also just make sure the test really sent both events to the topic.
final List<KeyValue<String, String>> events = globalTopic.readKeyValuesToList();
assertThat(
events,
is(Arrays.asList(
new KeyValue<>("A", "alpha"),
new KeyValue<>("A", "recurse-alpha")
))
);
}
}
@Test
public void shouldRespectTaskIdling() {
final Properties properties = new Properties();
properties.setProperty(StreamsConfig.APPLICATION_ID_CONFIG, "dummy");
properties.setProperty(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "dummy");
// This is the key to this test. Wall-clock time doesn't advance automatically in TopologyTestDriver,
// so with an idle time specified, TTD can't just expect all enqueued records to be processable.
properties.setProperty(StreamsConfig.MAX_TASK_IDLE_MS_CONFIG, "1000");
final Topology topology = new Topology();
topology.addSource("source1", new StringDeserializer(), new StringDeserializer(), "input1");
topology.addSource("source2", new StringDeserializer(), new StringDeserializer(), "input2");
topology.addSink("sink", "output", new StringSerializer(), new StringSerializer(), "source1", "source2");
try (final TopologyTestDriver topologyTestDriver = new TopologyTestDriver(topology, properties)) {
final TestInputTopic<String, String> in1 = topologyTestDriver.createInputTopic("input1", new StringSerializer(), new StringSerializer());
final TestInputTopic<String, String> in2 = topologyTestDriver.createInputTopic("input2", new StringSerializer(), new StringSerializer());
final TestOutputTopic<String, String> out = topologyTestDriver.createOutputTopic("output", new StringDeserializer(), new StringDeserializer());
in1.pipeInput("A", "alpha");
topologyTestDriver.advanceWallClockTime(Duration.ofMillis(1));
// only one input has records, and it's only been one ms
assertThat(out.readKeyValuesToList(), is(Collections.emptyList()));
in2.pipeInput("B", "beta");
// because both topics have records, we can process (even though it's only been one ms)
// but after processing A (the earlier record), we now only have one input queued, so
// task idling takes effect again
assertThat(
out.readKeyValuesToList(),
is(Collections.singletonList(
new KeyValue<>("A", "alpha")
))
);
topologyTestDriver.advanceWallClockTime(Duration.ofSeconds(1));
// now that one second has elapsed, the idle time has expired, and we can process B
assertThat(
out.readKeyValuesToList(),
is(Collections.singletonList(
new KeyValue<>("B", "beta")
))
);
}
}
}

21
streams/test-utils/src/test/resources/log4j.properties Normal file
View File

@ -0,0 +1,21 @@
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c:%L)%n
log4j.logger.org.apache.kafka=INFO