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.zookeeper.cluster.integration;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.Executors;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.ThreadLocalRandom;
  import java.util.concurrent.TimeUnit;
  import java.util.stream.IntStream;
  
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.zookeeper.cluster.ZooKeeperClusterService;
  import org.apache.camel.impl.DefaultCamelContext;
  import org.apache.camel.test.infra.zookeeper.services.ZooKeeperService;
  import org.apache.camel.test.infra.zookeeper.services.ZooKeeperServiceFactory;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.RegisterExtension;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public final class ZooKeeperMasterIT {
      @RegisterExtension
      static ZooKeeperService service = ZooKeeperServiceFactory.createService();
  
      private static final Logger LOGGER = LoggerFactory.getLogger(ZooKeeperMasterIT.class);
      private static final List<String> CLIENTS = IntStream.range(0, 3).mapToObj(Integer::toString).toList();
      private static final List<String> RESULTS = new ArrayList<>();
      private static final ScheduledExecutorService SCHEDULER = Executors.newScheduledThreadPool(CLIENTS.size());
      private static final CountDownLatch LATCH = new CountDownLatch(CLIENTS.size());
  
      // ************************************
      // Test
      // ************************************
  
      @Test
      public void test() throws Exception {
          String connectString = service.getConnectionString();
          for (String id : CLIENTS) {
              SCHEDULER.submit(() -> run(connectString, id));
          }
  
          LATCH.await(1, TimeUnit.MINUTES);
          SCHEDULER.shutdownNow();
  
          assertEquals(CLIENTS.size(), RESULTS.size());
          assertTrue(RESULTS.containsAll(CLIENTS));
      }
  
      // ************************************
      // Run a Camel node
      // ************************************
  
      private static void run(String connectString, String id) {
          try {
              int events = ThreadLocalRandom.current().nextInt(2, 6);
              CountDownLatch contextLatch = new CountDownLatch(events);
  
              ZooKeeperClusterService service = new ZooKeeperClusterService();
              service.setId("node-" + id);
              service.setNodes(connectString);
              service.setBasePath("/camel/master");
  
              DefaultCamelContext context = new DefaultCamelContext();
              context.disableJMX();
              context.getCamelContextExtension().setName("context-" + id);
              context.addService(service);
              context.addRoutes(new RouteBuilder() {
                  @Override
                  public void configure() {
                      from("master:zk:timer:master?delay=1000&period=1000")
                              .routeId("route-" + id)
                              .log("From ${routeId}")
                              .process(e -> contextLatch.countDown());
                  }
              });
  
              // Start the context after some random time so the startup order
              // changes for each test.
              Thread.sleep(ThreadLocalRandom.current().nextInt(500));
              context.start();
  
              contextLatch.await();
  
              LOGGER.debug("Shutting down node {}", id);
              RESULTS.add(id);
  
              context.stop();
  
              LATCH.countDown();
          } catch (Exception e) {
              LOGGER.warn("{}", e.getMessage(), e);
          }
      }
  }
  