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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.
   *
   */
  package org.apache.mina.transport.socket.nio;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.net.InetSocketAddress;
  
  import org.apache.mina.core.service.IoHandlerAdapter;
  import org.apache.mina.core.session.IdleStatus;
  import org.apache.mina.core.session.IoSession;
  import org.apache.mina.util.AvailablePortFinder;
  import org.junit.Test;
  
  /**
   * Test for DIRMINA-732
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class DatagramSessionIdleTest {
  
      private boolean readerIdleReceived;
  
      private boolean writerIdleReceived;
  
      private boolean bothIdleReceived;
  
      private Object mutex = new Object();
  
      private class TestHandler extends IoHandlerAdapter {
  
          @Override
          public void sessionIdle(IoSession session, IdleStatus status)
                  throws Exception {
              if (status == IdleStatus.BOTH_IDLE) {
                  bothIdleReceived = true;
              } else if (status == IdleStatus.READER_IDLE) {
                  readerIdleReceived = true;
              } else if (status == IdleStatus.WRITER_IDLE) {
                  writerIdleReceived = true;
              }
              
              synchronized (mutex) {
                  mutex.notifyAll();
              }
              
              super.sessionIdle(session, status);
          }
      }
  
      @Test
      public void testSessionIdle() throws Exception {
          final int READER_IDLE_TIME = 3;//seconds
          final int WRITER_IDLE_TIME = READER_IDLE_TIME + 2;//seconds
          final int BOTH_IDLE_TIME = WRITER_IDLE_TIME + 2;//seconds
          
          NioDatagramAcceptor acceptor = new NioDatagramAcceptor();
          acceptor.getSessionConfig().setBothIdleTime(BOTH_IDLE_TIME);
          acceptor.getSessionConfig().setReaderIdleTime(READER_IDLE_TIME);
          acceptor.getSessionConfig().setWriterIdleTime(WRITER_IDLE_TIME);
          InetSocketAddress bindAddress = new InetSocketAddress(  AvailablePortFinder.getNextAvailable());
          acceptor.setHandler(new TestHandler());
          acceptor.bind(bindAddress);
          IoSession session = acceptor.newSession(new InetSocketAddress(
                  "127.0.0.1", AvailablePortFinder.getNextAvailable()), bindAddress);
          
          //check properties to be copied from acceptor to session
          assertEquals(BOTH_IDLE_TIME, session.getConfig().getBothIdleTime());
          assertEquals(READER_IDLE_TIME, session.getConfig().getReaderIdleTime());
          assertEquals(WRITER_IDLE_TIME, session.getConfig().getWriterIdleTime());
          
          //verify that IDLE events really received by handler
          long startTime = System.currentTimeMillis();
          
          synchronized (mutex) {
              while (!readerIdleReceived
                      && (System.currentTimeMillis() - startTime) < (READER_IDLE_TIME + 1) * 1000)
                  try {
                      mutex.wait(READER_IDLE_TIME * 1000);
                  } catch (Exception e) {
                      e.printStackTrace();
                 }
         }
         
         assertTrue(readerIdleReceived);
         
         synchronized (mutex) {
             while (!writerIdleReceived
                     && (System.currentTimeMillis() - startTime) < (WRITER_IDLE_TIME + 1) * 1000)
                 try {
                     mutex.wait((WRITER_IDLE_TIME - READER_IDLE_TIME) * 1000);
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
         }
         
         assertTrue(writerIdleReceived);
         
         synchronized (mutex) {
             while (!bothIdleReceived
                     && (System.currentTimeMillis() - startTime) < (BOTH_IDLE_TIME + 1) * 1000)
                 try {
                     mutex.wait((BOTH_IDLE_TIME - WRITER_IDLE_TIME) * 1000);
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
         }
         
         assertTrue(bothIdleReceived);
     }
 }