cadonna commented on a change in pull request #11063: URL: https://github.com/apache/kafka/pull/11063#discussion_r671139543
########## File path: streams/src/test/java/org/apache/kafka/streams/integration/WindowedChangelogRetentionIntegrationTest.java ########## @@ -0,0 +1,365 @@ +/* + * 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. + */ +package org.apache.kafka.streams.integration; + +import org.apache.kafka.clients.consumer.ConsumerConfig; +import org.apache.kafka.common.config.TopicConfig; +import org.apache.kafka.common.serialization.Serde; +import org.apache.kafka.common.serialization.Serdes; +import org.apache.kafka.common.utils.Bytes; +import org.apache.kafka.streams.KafkaStreams; +import org.apache.kafka.streams.KafkaStreams.State; +import org.apache.kafka.streams.StreamsBuilder; +import org.apache.kafka.streams.StreamsConfig; +import org.apache.kafka.streams.Topology; +import org.apache.kafka.streams.integration.utils.EmbeddedKafkaCluster; +import org.apache.kafka.streams.integration.utils.IntegrationTestUtils; +import org.apache.kafka.streams.kstream.Consumed; +import org.apache.kafka.streams.kstream.Grouped; +import org.apache.kafka.streams.kstream.JoinWindows; +import org.apache.kafka.streams.kstream.KGroupedStream; +import org.apache.kafka.streams.kstream.KStream; +import org.apache.kafka.streams.kstream.KeyValueMapper; +import org.apache.kafka.streams.kstream.Materialized; +import org.apache.kafka.streams.kstream.Produced; +import org.apache.kafka.streams.kstream.SessionWindows; +import org.apache.kafka.streams.kstream.StreamJoined; +import org.apache.kafka.streams.kstream.TimeWindows; +import org.apache.kafka.streams.kstream.Windowed; +import org.apache.kafka.streams.kstream.WindowedSerdes; +import org.apache.kafka.streams.state.SessionStore; +import org.apache.kafka.streams.state.WindowStore; +import org.apache.kafka.test.IntegrationTest; +import org.apache.kafka.test.MockMapper; +import org.apache.kafka.test.TestUtils; +import org.junit.After; +import org.junit.AfterClass; +import org.junit.Before; +import org.junit.BeforeClass; +import org.junit.Rule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.junit.rules.TestName; + +import java.io.IOException; +import java.time.Duration; +import java.util.Collections; +import java.util.Properties; + +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.safeUniqueTestName; +import static org.hamcrest.MatcherAssert.assertThat; +import static org.hamcrest.core.Is.is; + +@SuppressWarnings("deprecation") +@Category({IntegrationTest.class}) +public class WindowedChangelogRetentionIntegrationTest { + private static final int NUM_BROKERS = 1; + private static final Duration DEFAULT_RETENTION = Duration.ofDays(1); + + public static final EmbeddedKafkaCluster CLUSTER = new EmbeddedKafkaCluster(NUM_BROKERS); + + private StreamsBuilder builder; + private Properties streamsConfiguration; + private KafkaStreams kafkaStreams; + private String streamOneInput; + private String streamTwoInput; + private String outputTopic; + private KGroupedStream<String, String> groupedStream; + private KStream<Integer, String> stream; + private KStream<Integer, String> stream1; + private KStream<Integer, String> stream2; + + @Rule + public TestName testName = new TestName(); + + @BeforeClass + public static void startCluster() throws IOException { + CLUSTER.start(); + } + + @AfterClass + public static void closeCluster() { + CLUSTER.stop(); + } + + @Before + public void before() throws InterruptedException { + builder = new StreamsBuilder(); + createTopics(); + streamsConfiguration = new Properties(); + final String safeTestName = safeUniqueTestName(getClass(), testName); + streamsConfiguration.put(StreamsConfig.APPLICATION_ID_CONFIG, "app-" + safeTestName); + streamsConfiguration.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, CLUSTER.bootstrapServers()); + streamsConfiguration.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest"); + streamsConfiguration.put(StreamsConfig.STATE_DIR_CONFIG, TestUtils.tempDirectory().getPath()); + streamsConfiguration.put(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG, 0); + streamsConfiguration.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 100); + streamsConfiguration.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass()); + streamsConfiguration.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.Integer().getClass()); + + final KeyValueMapper<Integer, String, String> mapper = MockMapper.selectValueMapper(); + stream = builder.stream(streamOneInput, Consumed.with(Serdes.Integer(), Serdes.String())); + groupedStream = stream.groupBy(mapper, Grouped.with(Serdes.String(), Serdes.String())); + } + + @After + public void whenShuttingDown() throws Exception { + if (kafkaStreams != null) { + kafkaStreams.close(); + } + IntegrationTestUtils.purgeLocalStreamsState(streamsConfiguration); + } + + @Test + public void timeWindowedChangelogShouldHaveRetentionOfWindowSize() throws Exception { + final Duration windowSize = Duration.ofDays(2); + final String storeName = "windowed-store"; + final Serde<Windowed<String>> windowedSerde = WindowedSerdes.timeWindowedSerdeFrom(String.class, windowSize.toMillis()); + groupedStream.windowedBy(TimeWindows.of(windowSize)) + .count(Materialized.as(storeName)) + .toStream() + .to(outputTopic, Produced.with(windowedSerde, Serdes.Long())); + + startStreams(); + + verifyChangelogRetentionOfWindowedStore(storeName, windowSize); + } + + @Test + public void timeWindowedChangelogShouldHaveDefaultRetentionWithoutGrace() throws Exception { + final Duration windowSize = Duration.ofMillis(500); + final String storeName = "windowed-store"; + final Serde<Windowed<String>> windowedSerde = WindowedSerdes.timeWindowedSerdeFrom(String.class, windowSize.toMillis()); + groupedStream.windowedBy(TimeWindows.of(Duration.ofMillis(500))) + .count(Materialized.as(storeName)) + .toStream() + .to(outputTopic, Produced.with(windowedSerde, Serdes.Long())); + + startStreams(); + + verifyChangelogRetentionOfWindowedStore(storeName, DEFAULT_RETENTION); + } + + @Test + public void timeWindowedChangelogShouldHaveDefaultRetentionWithGrace() throws Exception { + final Duration windowSize = Duration.ofMillis(500); + final Duration grace = Duration.ofMillis(1000); + final String storeName = "windowed-store"; + final Serde<Windowed<String>> windowedSerde = WindowedSerdes.timeWindowedSerdeFrom(String.class, windowSize.toMillis()); + groupedStream.windowedBy(TimeWindows.of(windowSize).grace(grace)) + .count(Materialized.as(storeName)) + .toStream() + .to(outputTopic, Produced.with(windowedSerde, Serdes.Long())); + + startStreams(); + + verifyChangelogRetentionOfWindowedStore(storeName, DEFAULT_RETENTION); + } + + @Test + public void timeWindowedChangelogShouldHaveRetentionOfWindowSizeAndGrace() throws Exception { + final Duration windowSize = Duration.ofDays(1); + final Duration grace = Duration.ofHours(12); + final String storeName = "windowed-store"; + final Serde<Windowed<String>> windowedSerde = WindowedSerdes.timeWindowedSerdeFrom(String.class, windowSize.toMillis()); + groupedStream.windowedBy(TimeWindows.of(windowSize).grace(grace)) + .count(Materialized.as(storeName)) + .toStream() + .to(outputTopic, Produced.with(windowedSerde, Serdes.Long())); + + startStreams(); + + verifyChangelogRetentionOfWindowedStore(storeName, windowSize.plus(grace)); + } + + @Test + public void timeWindowedChangelogShouldHaveUserSpecifiedRetention() throws Exception { + final Duration windowSize = Duration.ofDays(1); + final Duration grace = Duration.ofHours(12); + final String storeName = "windowed-store"; + final Serde<Windowed<String>> windowedSerde = WindowedSerdes.timeWindowedSerdeFrom(String.class, windowSize.toMillis()); + groupedStream.windowedBy(TimeWindows.of(windowSize).grace(grace)) + .count(Materialized.<String, Long, WindowStore<Bytes, byte[]>>as(storeName).withRetention(windowSize.multipliedBy(3))) Review comment: "times 3" is indeed not that comprehensible. I just chose a duration that was greater than window size + grace. The point is not that it must be greater than max(default, windowSize + grace). If users specify a retention via `Materialized`, the retention must be larger than window size + grace, otherwhise an exception is thrown. I will set window size + grace + 1 hour. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
