content: /*
   * 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.camel.component.kafka.integration;
  
  import java.util.Collections;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  import org.apache.camel.EndpointInject;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.mock.MockEndpoint;
  import org.apache.camel.spi.StateRepository;
  import org.apache.camel.spring.boot.CamelAutoConfiguration;
  import org.apache.camel.test.spring.junit5.CamelSpringBootTest;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.condition.DisabledIfSystemProperty;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.test.annotation.DirtiesContext;
  
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  @DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS)
  @CamelSpringBootTest
  @SpringBootTest(classes = { CamelAutoConfiguration.class, BaseEmbeddedKafkaTestSupport.DefaulKafkaComponent.class,
          KafkaConsumerRebalanceIT.class, OffsetStateRepositoryConfiguration.class,
          KafkaConsumerRebalanceIT.TestConfiguration.class, })
  @DisabledIfSystemProperty(named = "ci.env.name", matches = "github.com", disabledReason = "Disabled on GH Action due to Docker limit")
  public class KafkaConsumerRebalanceIT extends BaseEmbeddedKafkaTestSupport {
      private static final String TOPIC = "offset-rebalance";
  
      @EndpointInject("mock:result")
      private MockEndpoint result;
  
      @Autowired
      private CountDownLatch messagesLatch;
  
      @Test
      public void offsetGetStateMustHaveBeenCalledTwice() throws Exception {
          boolean offsetGetStateCalled = messagesLatch.await(30000, TimeUnit.MILLISECONDS);
          // The getState should most likely be called during the partition assignment
          assertTrue(offsetGetStateCalled, "StateRepository.getState should have been called for topic " + TOPIC
                  + ". Remaining count : " + messagesLatch.getCount());
      }
  
      @AfterEach
      public void after() {
          // clean all test topics
          kafkaAdminClient.deleteTopics(Collections.singletonList(TOPIC));
      }
  
      @Configuration
      public class TestConfiguration {
          @Bean
          public RouteBuilder routeBuilder() {
              return new RouteBuilder() {
                  @Override
                  public void configure() {
                      from("kafka:" + TOPIC + "?groupId=" + TOPIC + "_GROUP" + "&autoCommitIntervalMs=1000"
                              + "&autoOffsetReset=latest" + "&consumersCount=1" + "&offsetRepository=#offset")
                                      .routeId("consumer-rebalance-route").to("mock:result");
                  }
              };
          }
      }
  
      public static class OffsetStateRepository implements StateRepository<String, String> {
          private static final Logger LOG = LoggerFactory.getLogger(OffsetStateRepository.class);
          CountDownLatch messagesLatch;
  
          public OffsetStateRepository(CountDownLatch messagesLatch) {
              this.messagesLatch = messagesLatch;
          }
  
          @Override
          public void start() {
          }
  
          @Override
          public void stop() {
          }
  
          @Override
          public String getState(String key) {
              LOG.debug("Getting the state for {} from topic {}", key, TOPIC);
              if (key.contains(TOPIC)) {
                  LOG.trace("Topic matches, counting down");
                  messagesLatch.countDown();
              }
  
              return "-1";
          }
  
          @Override
          public void setState(String key, String value) {
          }
      }
  }
  