cadonna commented on a change in pull request #9191: URL: https://github.com/apache/kafka/pull/9191#discussion_r482791614
########## File path: streams/src/test/java/org/apache/kafka/streams/processor/internals/HandlingSourceTopicDeletionTest.java ########## @@ -0,0 +1,109 @@ +/* + * 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.processor.internals; + +import org.apache.kafka.common.serialization.Serdes; +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.kstream.Consumed; +import org.apache.kafka.streams.kstream.Produced; +import org.apache.kafka.test.IntegrationTest; +import org.apache.kafka.test.TestUtils; +import org.junit.After; +import org.junit.Before; +import org.junit.ClassRule; +import org.junit.Rule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.junit.rules.TestName; + +import java.util.Properties; +import java.util.concurrent.atomic.AtomicBoolean; + +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.safeUniqueTestName; +import static org.hamcrest.CoreMatchers.is; +import static org.hamcrest.MatcherAssert.assertThat; + +@Category({IntegrationTest.class}) +public class HandlingSourceTopicDeletionTest { + + private static final int NUM_BROKERS = 1; + private static final int NUM_THREADS = 2; + private static final long TIMEOUT = 60000; + private static final String INPUT_TOPIC = "inputTopic"; + private static final String OUTPUT_TOPIC = "outputTopic"; + + @ClassRule + public static final EmbeddedKafkaCluster CLUSTER = new EmbeddedKafkaCluster(NUM_BROKERS); + + @Rule + public TestName testName = new TestName(); + + @Before + public void before() throws InterruptedException { + CLUSTER.createTopics(INPUT_TOPIC, OUTPUT_TOPIC); + } + + @After + public void after() throws InterruptedException { + CLUSTER.deleteTopics(INPUT_TOPIC, OUTPUT_TOPIC); + } + + @Test + public void shouldThrowErrorAfterSourceTopicDeleted() throws InterruptedException { + final StreamsBuilder builder = new StreamsBuilder(); + builder.stream(INPUT_TOPIC, Consumed.with(Serdes.Integer(), Serdes.String())) + .to(OUTPUT_TOPIC, Produced.with(Serdes.Integer(), Serdes.String())); + + final String safeTestName = safeUniqueTestName(getClass(), testName); + final String appId = "app-" + safeTestName; + + final Properties streamsConfiguration = new Properties(); + streamsConfiguration.put(StreamsConfig.APPLICATION_ID_CONFIG, appId); + streamsConfiguration.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, CLUSTER.bootstrapServers()); + streamsConfiguration.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.Integer().getClass()); + streamsConfiguration.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass()); + streamsConfiguration.put(StreamsConfig.NUM_STREAM_THREADS_CONFIG, NUM_THREADS); + streamsConfiguration.put(StreamsConfig.METADATA_MAX_AGE_CONFIG, 2000); + + final Topology topology = builder.build(); + final KafkaStreams kafkaStreams = new KafkaStreams(topology, streamsConfiguration); + + final AtomicBoolean calledUncaughtExceptionHandler = new AtomicBoolean(false); + kafkaStreams.setUncaughtExceptionHandler((thread, exception) -> calledUncaughtExceptionHandler.set(true)); + kafkaStreams.start(); + TestUtils.waitForCondition( + () -> kafkaStreams.state() == State.RUNNING, + TIMEOUT, + () -> "Kafka Streams application did not reach state RUNNING" + ); + + CLUSTER.deleteTopicAndWait(INPUT_TOPIC); + + TestUtils.waitForCondition( + () -> kafkaStreams.state() == State.ERROR, + TIMEOUT, + () -> "Kafka Streams application did not reach state ERROR" + ); Review comment: I had that thought, too. But then I thought it is not required to test the code added in this PR. On the other hand, it does not harm to use two Streams clients and broaden the test scope. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
