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   * 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.serialization.Serdes;
  import org.apache.kafka.common.serialization.StringDeserializer;
  import org.apache.kafka.common.serialization.StringSerializer;
  import org.apache.kafka.streams.KafkaStreams;
  import org.apache.kafka.streams.KeyValue;
  import org.apache.kafka.streams.KeyValueTimestamp;
  import org.apache.kafka.streams.StreamsBuilder;
  import org.apache.kafka.streams.StreamsConfig;
  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.JoinWindows;
  import org.apache.kafka.streams.kstream.KStream;
  import org.apache.kafka.streams.kstream.Produced;
  import org.apache.kafka.streams.kstream.TimeWindowedDeserializer;
  import org.apache.kafka.streams.kstream.ValueJoiner;
  import org.apache.kafka.test.TestUtils;
  
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Tag;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.TestInfo;
  
  import java.io.IOException;
  import java.time.Duration;
  import java.util.List;
  import java.util.Properties;
  
  import static java.time.Duration.ofMinutes;
  import static java.util.Arrays.asList;
  import static java.util.Collections.singletonList;
  import static org.apache.kafka.streams.utils.TestUtils.safeUniqueTestName;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.core.Is.is;
  
  @Tag("integration")
  public class SelfJoinUpgradeIntegrationTest {
      public static final String INPUT_TOPIC = "selfjoin-input";
      public static final String OUTPUT_TOPIC = "selfjoin-output";
      private String inputTopic;
      private String outputTopic;
  
      private KafkaStreams kafkaStreams;
  
      public static final EmbeddedKafkaCluster CLUSTER = new EmbeddedKafkaCluster(1);
  
      @BeforeAll
      public static void startCluster() throws IOException {
          CLUSTER.start();
      }
  
      @AfterAll
      public static void closeCluster() {
          CLUSTER.stop();
      }
  
      private String safeTestName;
  
      @BeforeEach
      public void createTopics(final TestInfo testInfo) throws Exception {
          safeTestName = safeUniqueTestName(testInfo);
          inputTopic = INPUT_TOPIC + safeTestName;
          outputTopic = OUTPUT_TOPIC + safeTestName;
          CLUSTER.createTopic(inputTopic);
          CLUSTER.createTopic(outputTopic);
      }
  
      private Properties props() {
          final Properties streamsConfiguration = new Properties();
          streamsConfiguration.put(StreamsConfig.APPLICATION_ID_CONFIG, "app-" + safeTestName);
          streamsConfiguration.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, CLUSTER.bootstrapServers());
          streamsConfiguration.put(StreamsConfig.STATESTORE_CACHE_MAX_BYTES_CONFIG, 0);
          streamsConfiguration.put(StreamsConfig.STATE_DIR_CONFIG, TestUtils.tempDirectory().getPath());
          streamsConfiguration.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG,
                                   Serdes.String().getClass());
          streamsConfiguration.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG,
                                   Serdes.String().getClass());
          streamsConfiguration.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 1000L);
          streamsConfiguration.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
          return streamsConfiguration;
      }
  
      @AfterEach
      public void shutdown() {
          if (kafkaStreams != null) {
              kafkaStreams.close(Duration.ofSeconds(30L));
              kafkaStreams.cleanUp();
          }
      }
  
  
      @Test
      public void shouldUpgradeWithTopologyOptimizationOff() throws Exception {
  
          final StreamsBuilder streamsBuilderOld = new StreamsBuilder();
          final KStream<String, String> leftOld = streamsBuilderOld.stream(
              inputTopic, Consumed.with(Serdes.String(), Serdes.String()));
          final ValueJoiner<String, String, String> valueJoiner = (v, v2) -> v + v2;
          final KStream<String, String> joinedOld = leftOld.join(
              leftOld,
              valueJoiner,
              JoinWindows.ofTimeDifferenceWithNoGrace(ofMinutes(100))
          );
          joinedOld.to(outputTopic, Produced.with(Serdes.String(), Serdes.String()));
  
          final Properties props = props();
          props.put(StreamsConfig.TOPOLOGY_OPTIMIZATION_CONFIG, StreamsConfig.NO_OPTIMIZATION);
          kafkaStreams = new KafkaStreams(streamsBuilderOld.build(), props);
          kafkaStreams.start();
  
          final long currentTime = CLUSTER.time.milliseconds();
          processKeyValueAndVerifyCount(
              "1",
              "A",
              currentTime + 42L,
              singletonList(new KeyValueTimestamp<>("1", "AA", currentTime + 42L))
          );
  
          processKeyValueAndVerifyCount(
              "1",
              "B",
              currentTime + 43L,
              asList(
                  new KeyValueTimestamp<>("1", "BA", currentTime + 43L),
                  new KeyValueTimestamp<>("1", "AB", currentTime + 43L),
                  new KeyValueTimestamp<>("1", "BB", currentTime + 43L)
              )
          );
  
  
          kafkaStreams.close();
          kafkaStreams = null;
  
          props.put(StreamsConfig.TOPOLOGY_OPTIMIZATION_CONFIG, StreamsConfig.OPTIMIZE);
          kafkaStreams = new KafkaStreams(streamsBuilderOld.build(), props);
          kafkaStreams.start();
  
          final long currentTimeNew = CLUSTER.time.milliseconds();
  
          processKeyValueAndVerifyCount(
              "1",
              "C",
              currentTimeNew + 44L,
              asList(
                  new KeyValueTimestamp<>("1", "CA", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "CB", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "AC", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "BC", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "CC", currentTimeNew + 44L)
              )
          );
  
          kafkaStreams.close();
      }
  
      @Test
      public void shouldRestartWithTopologyOptimizationOn() throws Exception {
  
          final StreamsBuilder streamsBuilderOld = new StreamsBuilder();
          final KStream<String, String> leftOld = streamsBuilderOld.stream(
              inputTopic, Consumed.with(Serdes.String(), Serdes.String()));
          final ValueJoiner<String, String, String> valueJoiner = (v, v2) -> v + v2;
          final KStream<String, String> joinedOld = leftOld.join(
              leftOld,
              valueJoiner,
              JoinWindows.ofTimeDifferenceWithNoGrace(ofMinutes(100))
          );
          joinedOld.to(outputTopic, Produced.with(Serdes.String(), Serdes.String()));
  
  
          final Properties props = props();
          props.put(StreamsConfig.TOPOLOGY_OPTIMIZATION_CONFIG, StreamsConfig.OPTIMIZE);
          kafkaStreams = new KafkaStreams(streamsBuilderOld.build(), props);
          kafkaStreams.start();
  
          final long currentTime = CLUSTER.time.milliseconds();
          processKeyValueAndVerifyCount(
              "1",
              "A",
              currentTime + 42L,
              singletonList(new KeyValueTimestamp<>("1", "AA", currentTime + 42L))
          );
  
          processKeyValueAndVerifyCount(
              "1",
              "B",
              currentTime + 43L,
              asList(
                  new KeyValueTimestamp<>("1", "BA", currentTime + 43L),
                  new KeyValueTimestamp<>("1", "AB", currentTime + 43L),
                  new KeyValueTimestamp<>("1", "BB", currentTime + 43L)
              )
          );
  
          kafkaStreams.close();
          kafkaStreams = null;
  
          props.put(StreamsConfig.TOPOLOGY_OPTIMIZATION_CONFIG, StreamsConfig.OPTIMIZE);
          kafkaStreams = new KafkaStreams(streamsBuilderOld.build(), props);
          kafkaStreams.start();
  
          final long currentTimeNew = CLUSTER.time.milliseconds();
  
          processKeyValueAndVerifyCount(
              "1",
              "C",
              currentTimeNew + 44L,
              asList(
                  new KeyValueTimestamp<>("1", "CA", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "CB", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "AC", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "BC", currentTimeNew + 44L),
                  new KeyValueTimestamp<>("1", "CC", currentTimeNew + 44L)
              )
          );
  
          kafkaStreams.close();
      }
  
  
      private <K, V> boolean processKeyValueAndVerifyCount(
          final K key,
          final V value,
          final long timestamp,
          final List<KeyValueTimestamp<K, V>> expected)
          throws Exception {
  
          IntegrationTestUtils.produceKeyValuesSynchronouslyWithTimestamp(
              inputTopic,
              singletonList(KeyValue.pair(key, value)),
              TestUtils.producerConfig(CLUSTER.bootstrapServers(),
                                       StringSerializer.class,
                                       StringSerializer.class),
              timestamp);
  
  
          final Properties consumerProperties = new Properties();
          consumerProperties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, CLUSTER.bootstrapServers());
          consumerProperties.setProperty(ConsumerConfig.GROUP_ID_CONFIG, "group-" + safeTestName);
          consumerProperties.setProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
          consumerProperties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
          consumerProperties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
          consumerProperties.put(TimeWindowedDeserializer.WINDOW_SIZE_MS_CONFIG, 500L);
  
  
          final List<KeyValueTimestamp<K, V>> actual =
              IntegrationTestUtils.waitUntilMinKeyValueWithTimestampRecordsReceived(
              consumerProperties,
              outputTopic,
              expected.size(),
              60 * 1000);
  
          assertThat(actual, is(expected));
  
          return actual.equals(expected);
      }
  }
  