/*
    *  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.core.service;
  
  import org.apache.mina.core.future.CloseFuture;
  import org.apache.mina.core.future.ConnectFuture;
  import org.apache.mina.core.future.IoFuture;
  import org.apache.mina.core.future.IoFutureListener;
  import org.apache.mina.core.session.IdleStatus;
  import org.apache.mina.core.session.IoSession;
  import org.apache.mina.filter.codec.ProtocolCodecFilter;
  import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
  import org.apache.mina.filter.logging.LoggingFilter;
  import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
  import org.apache.mina.transport.socket.nio.NioSocketConnector;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.nio.charset.StandardCharsets;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.CountDownLatch;
  
  /**
   * test the AbstractIoService
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class AbstractIoServiceTest {
  
      private static final int PORT = 9123;
  
      @Test
      public void testDispose() throws IOException, InterruptedException {
  
          List<String> threadsBefore = getThreadNames();
  
          final IoAcceptor acceptor = new NioSocketAcceptor();
  
          acceptor.getFilterChain().addLast("logger", new LoggingFilter());
          acceptor.getFilterChain().addLast("codec",
                  new ProtocolCodecFilter(new TextLineCodecFactory(StandardCharsets.UTF_8)));
  
          acceptor.setHandler(new ServerHandler());
  
          acceptor.getSessionConfig().setReadBufferSize(2048);
          acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 10);
          acceptor.bind(new InetSocketAddress(PORT));
          System.out.println("Server running ...");
  
          final NioSocketConnector connector = new NioSocketConnector();
  
          // Set connect timeout.
          connector.setConnectTimeoutMillis(30 * 1000L);
  
          connector.setHandler(new ClientHandler());
          connector.getFilterChain().addLast("logger", new LoggingFilter());
          connector.getFilterChain().addLast("codec",
                  new ProtocolCodecFilter(new TextLineCodecFactory(StandardCharsets.UTF_8)));
  
          // Start communication.
          ConnectFuture cf = connector.connect(new InetSocketAddress("localhost", 9123));
          cf.awaitUninterruptibly();
  
          IoSession session = cf.getSession();
  
          // send a message
          session.write("Hello World!\r");
  
          // wait until response is received
          CountDownLatch latch = (CountDownLatch) session.getAttribute("latch");
          latch.await();
  
          // close the session
          CloseFuture closeFuture = session.closeOnFlush();
  
          System.out.println("session.close called");
          //Thread.sleep(5);
  
         // wait for session close and then dispose the connector
         closeFuture.addListener(new IoFutureListener<IoFuture>() {
 
             public void operationComplete(IoFuture future) {
                 System.out.println("managed session count=" + connector.getManagedSessionCount());
                 System.out.println("Disposing connector ...");
                 connector.dispose(true);
                 System.out.println("Disposing connector ... *finished*");
 
             }
         });
 
         closeFuture.awaitUninterruptibly();
         acceptor.dispose(true);
 
         List<String> threadsAfter = getThreadNames();
 
         System.out.println("threadsBefore = " + threadsBefore);
         System.out.println("threadsAfter  = " + threadsAfter);
 
         // Assert.assertEquals(threadsBefore, threadsAfter);
 
     }
 
     public static class ClientHandler extends IoHandlerAdapter {
 
         private static final Logger LOGGER = LoggerFactory.getLogger("CLIENT");
 
         @Override
         public void sessionCreated(IoSession session) throws Exception {
             session.setAttribute("latch", new CountDownLatch(1));
         }
 
         @Override
         public void messageReceived(IoSession session, Object message) throws Exception {
             LOGGER.info("client: messageReceived(" + session + ", " + message + ")");
             CountDownLatch latch = (CountDownLatch) session.getAttribute("latch");
             latch.countDown();
         }
 
         @Override
         public void exceptionCaught(IoSession session, Throwable cause) throws Exception {
             LOGGER.warn("exceptionCaught:", cause);
         }
     }
 
     public static class ServerHandler extends IoHandlerAdapter {
 
         private static final Logger LOGGER = LoggerFactory.getLogger("SERVER");
 
         @Override
         public void messageReceived(IoSession session, Object message) throws Exception {
             LOGGER.info("server: messageReceived(" + session + ", " + message + ")");
             session.write(message.toString());
         }
 
         @Override
         public void exceptionCaught(IoSession session, Throwable cause) throws Exception {
             LOGGER.warn("exceptionCaught:", cause);
         }
 
     }
 
     public static void main(String[] args) throws IOException, InterruptedException {
         new AbstractIoServiceTest().testDispose();
     }
 
     private List<String> getThreadNames() {
         List<String> list = new ArrayList<String>();
         int active = Thread.activeCount();
         Thread[] threads = new Thread[active];
         Thread.enumerate(threads);
         for (Thread thread : threads) {
             try {
                 String name = thread.getName();
                 list.add(name);
             } catch (NullPointerException ignore) {
             }
         }
         return list;
     }
 
 }