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Java > Open Source Codes > org > apache > mina > example > sumup > ClientSessionHandler


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 package org.apache.mina.example.sumup;
21
22 import org.apache.mina.common.IoHandler;
23 import org.apache.mina.common.IoHandlerAdapter;
24 import org.apache.mina.common.IoSession;
25 import org.apache.mina.example.sumup.message.AddMessage;
26 import org.apache.mina.example.sumup.message.ResultMessage;
27 import org.apache.mina.util.SessionLog;
28
29 /**
30  * {@link IoHandler} for SumUp client.
31  *
32  * @author The Apache Directory Project (mina-dev@directory.apache.org)
33  * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (금, 13 7월 2007) $
34  */
35 public class ClientSessionHandler extends IoHandlerAdapter {
36     private final int[] values;
37
38     private boolean finished;
39
40     public ClientSessionHandler(int[] values) {
41         this.values = values;
42     }
43
44     public boolean isFinished() {
45         return finished;
46     }
47
48     public void sessionOpened(IoSession session) {
49         // send summation requests
50 for (int i = 0; i < values.length; i++) {
51             AddMessage m = new AddMessage();
52             m.setSequence(i);
53             m.setValue(values[i]);
54             session.write(m);
55         }
56     }
57
58     public void messageReceived(IoSession session, Object JavaDoc message) {
59         // server only sends ResultMessage. otherwise, we will have to identify
60 // its type using instanceof operator.
61 ResultMessage rm = (ResultMessage) message;
62         if (rm.isOk()) {
63             // server returned OK code.
64 // if received the result message which has the last sequence
65 // number,
66 // it is time to disconnect.
67 if (rm.getSequence() == values.length - 1) {
68                 // print the sum and disconnect.
69 SessionLog.info(session, "The sum: " + rm.getValue());
70                 session.close();
71                 finished = true;
72             }
73         } else {
74             // seever returned error code because of overflow, etc.
75 SessionLog.warn(session, "Server error, disconnecting...");
76             session.close();
77             finished = true;
78         }
79     }
80
81     public void exceptionCaught(IoSession session, Throwable JavaDoc cause) {
82         session.close();
83     }
84 }
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