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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License.
18   *
19   */
20  
21  package org.apache.mina.examples.echoclient;
22  
23  import java.net.InetSocketAddress;
24  import java.nio.ByteBuffer;
25  import java.util.concurrent.ExecutionException;
26  
27  import org.apache.mina.api.AbstractIoHandler;
28  import org.apache.mina.api.IoFuture;
29  import org.apache.mina.api.IoSession;
30  import org.apache.mina.examples.echoserver.NioEchoServer;
31  import org.apache.mina.transport.nio.NioTcpClient;
32  import org.slf4j.Logger;
33  import org.slf4j.LoggerFactory;
34  
35  /**
36   * A simple TCP client, write back to the client every received messages.
37   * 
38   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
39   * 
40   */
41  public class NioEchoClient {
42  
43      static final private Logger LOG = LoggerFactory.getLogger(NioEchoServer.class);
44  
45      public static void main(String[] args) {
46          LOG.info("starting echo client");
47  
48          final NioTcpClient client = new NioTcpClient();
49          client.setFilters();
50          client.setIoHandler(new AbstractIoHandler() {
51              @Override
52              public void sessionOpened(final IoSession session) {
53                  LOG.info("session opened {}", session);
54              }
55  
56              @Override
57              public void messageReceived(IoSession session, Object message) {
58                  LOG.info("message received {}", message);
59                  if (message instanceof ByteBuffer) {
60                      LOG.info("echoing");
61                      session.write(message);
62                  }
63              }
64  
65              @Override
66              public void messageSent(IoSession session, Object message) {
67                  LOG.info("message sent {}", message);
68              }
69  
70              @Override
71              public void sessionClosed(IoSession session) {
72                  LOG.info("session closed {}", session);
73              }
74          });
75  
76          try {
77              IoFuture<IoSession> future = client.connect(new InetSocketAddress("localhost", 9999));
78  
79              try {
80                  IoSession session = future.get();
81                  LOG.info("session connected : {}", session);
82              } catch (ExecutionException e) {
83                  LOG.error("cannot connect : ", e);
84              }
85  
86              LOG.debug("Running the client for 25 sec");
87              Thread.sleep(25000);
88          } catch (InterruptedException e) {
89          }
90      }
91  }