helix-core/src/test/java/org/apache/helix/integration/TestStartMultipleControllersWithSameName.java

package org.apache.helix.integration;

/*
 * 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.
 */

import java.util.Date;

import org.apache.helix.PropertyPathBuilder;
import org.apache.helix.TestHelper;
import org.apache.helix.ZkTestHelper;
import org.apache.helix.common.ZkTestBase;
import org.apache.helix.integration.manager.ClusterControllerManager;
import org.apache.helix.model.IdealState.RebalanceMode;
import org.testng.Assert;
import org.testng.annotations.Test;

public class TestStartMultipleControllersWithSameName extends ZkTestBase {
  @Test
  public void test() throws Exception {
    String className = TestHelper.getTestClassName();
    String methodName = TestHelper.getTestMethodName();
    String clusterName = className + "_" + methodName;
    final int n = 3;

    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));

    TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
        "localhost", // participant name prefix
        "TestDB", // resource name prefix
        1, // resources
        10, // partitions per resource
        n, // number of nodes
        1, // replicas
        "OnlineOffline", RebalanceMode.FULL_AUTO, true); // do
    // rebalance

    // start controller
    ClusterControllerManager[] controllers = new ClusterControllerManager[4];
    for (int i = 0; i < 4; i++) {
      controllers[i] = new ClusterControllerManager(ZK_ADDR, clusterName, "controller_0");
      controllers[i].syncStart();
    }

    Thread.sleep(500); // wait leader election finishes
    String liPath = PropertyPathBuilder.liveInstance(clusterName);
    int listenerNb = ZkTestHelper.numberOfListeners(ZK_ADDR, liPath);
    // System.out.println("listenerNb: " + listenerNb);
    Assert.assertEquals(listenerNb, 1, "Only one controller should succeed in becoming leader");

    // clean up
    for (int i = 0; i < 4; i++) {
      controllers[i].syncStop();
    }
    deleteCluster(clusterName);

    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));

  }

}