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    * 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.
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  package org.apache.hadoop.chukwa.datacollection.agent;
  
  
  import java.util.ArrayList;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.chukwa.conf.ChukwaConfiguration;
  import org.apache.hadoop.chukwa.datacollection.agent.ChukwaAgent;
  import org.apache.hadoop.chukwa.datacollection.controller.ChukwaAgentController;
  import org.apache.hadoop.chukwa.datacollection.test.ConsoleOutConnector;
  import junit.framework.TestCase;
  //Note this test takes a minimum of 
  // 20 * 2 + 6* 20 = 160 seconds. 
  public class TestAgent extends TestCase {
  
    public void testStopAndStart() {
  
      try {
        Configuration conf = new Configuration();
        conf.setInt("chukwaAgent.control.port", 0);
        ChukwaAgent agent = new ChukwaAgent(conf);
        ConsoleOutConnector conn = new ConsoleOutConnector(agent, true);
        conn.start();
  
        int portno = agent.getControllerPort();
        ChukwaAgentController cli = new ChukwaAgentController("localhost", portno);
  
        for (int i = 1; i < 20; ++i) {
          String adaptorId = cli.add(
              "org.apache.hadoop.chukwa.util.ConstRateAdaptor", "raw" + i, "2000"
                  + i, 0);
          assertNotNull(adaptorId);
          Thread.sleep(2000);
          cli.removeAll();
        }
        agent.shutdown();
        conn.shutdown();
        Thread.sleep(2000);
      } catch (Exception e) {
        e.printStackTrace();
        fail(e.toString());
      }
    }
  
    public void testMultiStopAndStart() {
  
      try {
        Configuration conf = new Configuration();
        conf.setInt("chukwaAgent.control.port", 0);
        ChukwaAgent agent = new ChukwaAgent(conf);
        ConsoleOutConnector conn = new ConsoleOutConnector(agent, true);
        conn.start();
        int count = agent.adaptorCount();
        for (int trial = 0; trial < 20; ++trial) {
          ArrayList<String> runningAdaptors = new ArrayList<String>();
  
          for (int i = 1; i < 7; ++i) {
            String l = agent
                .processAddCommand("add  org.apache.hadoop.chukwa.util.ConstRateAdaptor  raw"
                    + i + " 2000" + i + " 0");
            assertTrue(l != null);
            runningAdaptors.add(l);
          }
          Thread.sleep(1000);
          for (String l : runningAdaptors)
            agent.stopAdaptor(l, false);
          Thread.sleep(5000);
          assertTrue(agent.adaptorCount() == count);
        }
        agent.shutdown();
        Thread.sleep(2000);
      } catch (Exception e) {
        e.printStackTrace();
        fail(e.toString());
      }
    }
  
    public void testLogRotate() {
  
    }
  
  }