/*
    *  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.example.tcp.perf;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.util.concurrent.atomic.AtomicInteger;
  
  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.transport.socket.SocketSessionConfig;
  import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
  
  /**
   * An TCP server used for performance tests.
   * 
   * It does nothing fancy, except receiving the messages, and counting the number of
   * received messages.
   * 
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class TcpServer extends IoHandlerAdapter {
      /** The listening port (check that it's not already in use) */
      public static final int PORT = 18567;
  
      /** The number of message to receive */
      public static final int MAX_RECEIVED = 100000;
  
      /** The starting point, set when we receive the first message */
      private static long t0;
  
      /** A counter incremented for every recieved message */
      private AtomicInteger nbReceived = new AtomicInteger(0);
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void exceptionCaught(IoSession session, Throwable cause) throws Exception {
          cause.printStackTrace();
          session.close(true);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void messageReceived(IoSession session, Object message) throws Exception {
  
          int nb = nbReceived.incrementAndGet();
  
          if (nb == 1) {
              t0 = System.currentTimeMillis();
          }
  
          if (nb == MAX_RECEIVED) {
              long t1 = System.currentTimeMillis();
              System.out.println("-------------> end " + (t1 - t0));
          }
  
          if (nb % 10000 == 0) {
              System.out.println("Received " + nb + " messages");
          }
  
          //System.out.println("Message : " + ((IoBuffer) message).getInt());
  
          //((IoBuffer) message).flip();
  
          // If we want to test the write operation, uncomment this line
          session.write(message);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void sessionClosed(IoSession session) throws Exception {
          System.out.println("Session closed...");
  
          // Reinitialize the counter and expose the number of received messages
          System.out.println("Nb message received : " + nbReceived.get());
         nbReceived.set(0);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void sessionCreated(IoSession session) throws Exception {
         System.out.println("Session created...");
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void sessionIdle(IoSession session, IdleStatus status) throws Exception {
         System.out.println("Session idle...");
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void sessionOpened(IoSession session) throws Exception {
         System.out.println("Session Opened...");
     }
 
     /**
      * Create the TCP server
      */
     public TcpServer() throws IOException {
         NioSocketAcceptor acceptor = new NioSocketAcceptor();
         acceptor.setHandler(this);
 
         // The logger, if needed. Commented atm
         //DefaultIoFilterChainBuilder chain = acceptor.getFilterChain();
         //chain.addLast("logger", new LoggingFilter());
 
         SocketSessionConfig scfg = acceptor.getSessionConfig();
 
         acceptor.bind(new InetSocketAddress(PORT));
 
         System.out.println("Server started...");
     }
 
     /**
      * The entry point.
      */
     public static void main(String[] args) throws IOException {
         new TcpServer();
     }
 }