View Javadoc
1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package org.jboss.netty.example.echo;
17  
18  import org.jboss.netty.buffer.ChannelBuffer;
19  import org.jboss.netty.channel.ChannelHandlerContext;
20  import org.jboss.netty.channel.ExceptionEvent;
21  import org.jboss.netty.channel.MessageEvent;
22  import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
23  
24  import java.util.concurrent.atomic.AtomicLong;
25  
26  /**
27   * Handler implementation for the echo server.
28   */
29  public class EchoServerHandler extends SimpleChannelUpstreamHandler {
30  
31      private final AtomicLong transferredBytes = new AtomicLong();
32  
33      public long getTransferredBytes() {
34          return transferredBytes.get();
35      }
36  
37      @Override
38      public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
39          // Send back the received message to the remote peer.
40          transferredBytes.addAndGet(((ChannelBuffer) e.getMessage()).readableBytes());
41          e.getChannel().write(e.getMessage());
42      }
43  
44      @Override
45      public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
46          // Close the connection when an exception is raised.
47          e.getCause().printStackTrace();
48          e.getChannel().close();
49      }
50  }