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 java.util.List;
  import java.util.Map;
  import java.util.TreeMap;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.I0Itec.zkclient.IZkChildListener;
  import org.apache.helix.HelixAdmin;
  import org.apache.helix.PropertyPathConfig;
  import org.apache.helix.PropertyType;
  import org.apache.helix.TestHelper;
  import org.apache.helix.ZNRecord;
  import org.apache.helix.PropertyKey.Builder;
  import org.apache.helix.controller.HelixControllerMain;
  import org.apache.helix.manager.zk.ZKHelixAdmin;
  import org.apache.helix.manager.zk.ZKHelixDataAccessor;
  import org.apache.helix.manager.zk.ZkBaseDataAccessor;
  import org.apache.helix.mock.participant.MockParticipant;
  import org.apache.helix.model.ClusterConstraints;
  import org.apache.helix.model.ConstraintItem;
  import org.apache.helix.model.Message;
  import org.apache.helix.model.ClusterConstraints.ConstraintType;
  import org.apache.helix.model.builder.ClusterConstraintsBuilder;
  import org.apache.helix.model.builder.ConstraintItemBuilder;
  import org.apache.helix.tools.ClusterStateVerifier;
  import org.apache.helix.tools.ClusterStateVerifier.BestPossAndExtViewZkVerifier;
  import org.apache.helix.tools.ClusterStateVerifier.MasterNbInExtViewVerifier;
  import org.testng.Assert;
  import org.testng.annotations.Test;
  
  
  public class TestMessageThrottle extends ZkIntegrationTestBase
  {
    @Test()
    public void testMessageThrottle() throws Exception
    {
      // Logger.getRootLogger().setLevel(Level.INFO);
  
      String clusterName = getShortClassName();
      MockParticipant[] participants = new MockParticipant[5];
      // ClusterSetup setupTool = new ClusterSetup(ZK_ADDR);
  
      System.out.println("START " + clusterName + " at "
          + new Date(System.currentTimeMillis()));
  
      TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant start
                                                           // 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
  
      // setup message constraint
      // "MESSAGE_TYPE=STATE_TRANSITION,TRANSITION=OFFLINE-SLAVE,INSTANCE=.*,CONSTRAINT_VALUE=1";
      HelixAdmin admin = new ZKHelixAdmin(_gZkClient);
      ConstraintItemBuilder builder = new ConstraintItemBuilder();
      builder.addConstraintAttribute("MESSAGE_TYPE", "STATE_TRANSITION")
             .addConstraintAttribute("INSTANCE", ".*")
             .addConstraintAttribute("CONSTRAINT_VALUE", "1");
      
  //    Map<String, String> constraints = new TreeMap<String, String>();
  //    constraints.put("MESSAGE_TYPE", "STATE_TRANSITION");
  //    // constraints.put("TRANSITION", "OFFLINE-SLAVE");
  //    constraints.put("CONSTRAINT_VALUE", "1");
  //    constraints.put("INSTANCE", ".*");
      admin.setConstraint(clusterName, ConstraintType.MESSAGE_CONSTRAINT, "constraint1", builder.build());
      
  
      final ZKHelixDataAccessor accessor =
          new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
  
      // make sure we never see more than 1 state transition message for each participant
      final AtomicBoolean success = new AtomicBoolean(true);
      for (int i = 0; i < 5; i++)
     {
       String instanceName = "localhost_" + (12918 + i);
       String msgPath =
           PropertyPathConfig.getPath(PropertyType.MESSAGES, clusterName, instanceName);
 
       _gZkClient.subscribeChildChanges(msgPath, new IZkChildListener()
       {
 
         @Override
         public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception
         {
           if (currentChilds != null && currentChilds.size() > 1)
           {
             List<ZNRecord> records = accessor.getBaseDataAccessor().getChildren(parentPath, null, 0);
             int transitionMsgCount = 0;
             for (ZNRecord record : records)
             {
               Message msg = new Message(record);
               if(msg.getMsgType().equals(Message.MessageType.STATE_TRANSITION.toString()))
               {
                 transitionMsgCount++;
               }
             }
 
             if (transitionMsgCount > 1)
             {
               success.set(false);
               Assert.fail("Should not see more than 1 message");
             }
           }
           
           
         }
       });
     }
 
     TestHelper.startController(clusterName,
                                "controller_0",
                                ZK_ADDR,
                                HelixControllerMain.STANDALONE);
     // start participants
     for (int i = 0; i < 5; i++)
     {
       String instanceName = "localhost_" + (12918 + i);
 
       participants[i] = new MockParticipant(clusterName, instanceName, ZK_ADDR);
       participants[i].syncStart();
     }
 
     boolean result =
         ClusterStateVerifier.verifyByZkCallback(new MasterNbInExtViewVerifier(ZK_ADDR,
                                                                               clusterName));
     Assert.assertTrue(result);
 
     result =
         ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
                                                                                  clusterName));
     Assert.assertTrue(result);
 
     Assert.assertTrue(success.get());
     
 
     // clean up
     for (int i = 0; i < 5; i++)
     {
       participants[i].syncStop();
     }
 
     System.out.println("END " + clusterName + " at "
         + new Date(System.currentTimeMillis()));
   }
 }