package org.apache.helix.manager.zk;
   
   /*
    * 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.UUID;
  
  import org.apache.helix.InstanceType;
  import org.apache.helix.TestHelper;
  import org.apache.helix.ZkHelixTestManager;
  import org.apache.helix.ZkTestHelper;
  import org.apache.helix.integration.ZkIntegrationTestBase;
  import org.testng.Assert;
  import org.testng.annotations.Test;
  
  public class TestZkManagerFlappingDetection extends ZkIntegrationTestBase
  {
    @Test
    public void testDisconnectHistory() throws Exception
    {
      String className = TestHelper.getTestClassName();
      String methodName = TestHelper.getTestMethodName();
      final String clusterName = className + "_" + methodName;
  
      TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
                              "localhost", // participant name prefix
                              "TestDB", // resource name prefix
                              1, // resources
                              10, // partitions per resource
                              5, // number of nodes
                              3, // replicas
                              "MasterSlave",
                              true); // do rebalance
      
      
        String instanceName = "localhost_" + (12918 + 0);
        ZkHelixTestManager manager =
            new ZkHelixTestManager(clusterName,
                                   instanceName,
                                   InstanceType.PARTICIPANT,
                                   ZK_ADDR);
        manager.connect();
        ZkClient zkClient = manager.getZkClient();
        ZkTestHelper.expireSession(zkClient);
        for(int i = 0;i < 4; i++)
        {
          ZkTestHelper.expireSession(zkClient);
          Thread.sleep(1000);
          if(i < 5)
          {
            //System.out.println(i);
            Assert.assertTrue(manager.isConnected());
          }
        }
        ZkTestHelper.disconnectSession(zkClient);
        for(int i = 0; i < 20; i++)
        {
          Thread.sleep(500);
          System.out.println(i);
          if(!manager.isConnected()) break;
        }
        Assert.assertFalse(manager.isConnected());
    }
    
    @Test(enabled=false)
    public void testDisconnectFlappingWindow() throws Exception
    {
      String className = TestHelper.getTestClassName();
      String methodName = TestHelper.getTestMethodName();
      String instanceName = "localhost_" + (12918 + 1);
      final String clusterName = className + "_" + methodName + UUID.randomUUID();
  
      testDisconnectFlappingWindow2(instanceName, InstanceType.PARTICIPANT);
      testDisconnectFlappingWindow2("admin", InstanceType.ADMINISTRATOR);
    }
    
    public void testDisconnectFlappingWindow2(String instanceName, InstanceType type) throws Exception
    {
      String className = TestHelper.getTestClassName();
      String methodName = TestHelper.getTestMethodName();
      final String clusterName = className + "_" + methodName + UUID.randomUUID();
  
      TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
                             "localhost", // participant name prefix
                             "TestDB", // resource name prefix
                             1, // resources
                             10, // partitions per resource
                             5, // number of nodes
                             3, // replicas
                             "MasterSlave",
                             true); // do rebalance
     
     
       // flapping time window to 5 sec
       System.setProperty("helixmanager.flappingTimeWindow", "15000");
       System.setProperty("helixmanager.maxDisconnectThreshold", "7");
       ZkHelixTestManager manager2 =
           new ZkHelixTestManager(clusterName,
                                  instanceName,
                                  type,
                                  ZK_ADDR);
       manager2.connect();
       ZkClient zkClient = manager2.getZkClient();
       for(int i = 0;i < 3; i++)
       {
         ZkTestHelper.expireSession(zkClient);
         Thread.sleep(500);
         Assert.assertTrue(manager2.isConnected());
       }
       Thread.sleep(15000);
       // Old entries should be cleaned up
       for(int i = 0;i < 7; i++)
       {
         ZkTestHelper.expireSession(zkClient);
         Thread.sleep(1000);
         Assert.assertTrue(manager2.isConnected());
       }
       ZkTestHelper.disconnectSession(zkClient);
       for(int i = 0; i < 20; i++)
       {
         Thread.sleep(500);
         if(!manager2.isConnected()) break;
       }
       Assert.assertFalse(manager2.isConnected());
   }
   
   //@Test
   public void testDisconnectFlappingWindowController() throws Exception
   {
     String className = TestHelper.getTestClassName();
     String methodName = TestHelper.getTestMethodName();
     final String clusterName = className + "_" + methodName;
 
     TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
                             "localhost", // participant name prefix
                             "TestDB", // resource name prefix
                             1, // resources
                             10, // partitions per resource
                             5, // number of nodes
                             3, // replicas
                             "MasterSlave",
                             true); // do rebalance
     
     
       // flapping time window to 5 sec
       System.setProperty("helixmanager.flappingTimeWindow", "5000");
       System.setProperty("helixmanager.maxDisconnectThreshold", "3");
       ZkHelixTestManager manager2 =
           new ZkHelixTestManager(clusterName,
                                  null,
                                  InstanceType.CONTROLLER,
                                  ZK_ADDR);
       manager2.connect();
       Thread.sleep(100);
       ZkClient zkClient = manager2.getZkClient();
       for(int i = 0;i < 2; i++)
       {
         ZkTestHelper.expireSession(zkClient);
         Thread.sleep(500);
         Assert.assertTrue(manager2.isConnected());
       }
       Thread.sleep(5000);
       // Old entries should be cleaned up
       for(int i = 0;i < 3; i++)
       {
         ZkTestHelper.expireSession(zkClient);
         Thread.sleep(500);
         Assert.assertTrue(manager2.isConnected());
       }
       ZkTestHelper.disconnectSession(zkClient);
       for(int i = 0; i < 20; i++)
       {
         Thread.sleep(500);
         if(!manager2.isConnected()) break;
       }
       Assert.assertFalse(manager2.isConnected());
   }
 }