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.transport.socket.nio;
21  
22  import java.net.InetSocketAddress;
23  
24  import junit.framework.Assert;
25  import junit.framework.TestCase;
26  
27  import org.apache.mina.common.ByteBuffer;
28  import org.apache.mina.common.ConnectFuture;
29  import org.apache.mina.common.ExpiringSessionRecycler;
30  import org.apache.mina.common.IdleStatus;
31  import org.apache.mina.common.IoAcceptor;
32  import org.apache.mina.common.IoConnector;
33  import org.apache.mina.common.IoHandlerAdapter;
34  import org.apache.mina.common.IoSession;
35  import org.apache.mina.util.AvailablePortFinder;
36  
37  /**
38   * Tests if datagram sessions are recycled properly.
39   * 
40   * @author The Apache Directory Project (mina-dev@directory.apache.org)
41   * @version $Rev: 436993 $, $Date: 2006-08-26 07:36:56 +0900 (토, 26  8월 2006) $ 
42   */
43  public class DatagramRecyclerTest extends TestCase {
44      private final IoAcceptor acceptor = new DatagramAcceptor();
45  
46      private final IoConnector connector = new DatagramConnector();
47  
48      public DatagramRecyclerTest() {
49      }
50  
51      public void testDatagramRecycler() throws Exception {
52          int port = AvailablePortFinder.getNextAvailable(1024);
53          DatagramAcceptorConfig config = new DatagramAcceptorConfig();
54          ExpiringSessionRecycler recycler = new ExpiringSessionRecycler(1, 1);
55          config.setSessionRecycler(recycler);
56  
57          MockHandler acceptorHandler = new MockHandler();
58          MockHandler connectorHandler = new MockHandler();
59  
60          acceptor.bind(new InetSocketAddress(port), acceptorHandler, config);
61  
62          try {
63              ConnectFuture future = connector.connect(new InetSocketAddress(
64                      "localhost", port), connectorHandler, config);
65              future.join();
66  
67              // Write whatever to trigger the acceptor.
68              future.getSession().write(ByteBuffer.allocate(1)).join();
69  
70              // Wait until the connection is closed.
71              future.getSession().getCloseFuture().join(3000);
72              Assert.assertTrue(future.getSession().getCloseFuture().isClosed());
73              acceptorHandler.session.getCloseFuture().join(3000);
74              Assert.assertTrue(acceptorHandler.session.getCloseFuture()
75                      .isClosed());
76  
77              Thread.sleep(1000);
78  
79              Assert.assertEquals("CROPSECL", connectorHandler.result.toString());
80              Assert.assertEquals("CROPRECL", acceptorHandler.result.toString());
81          } finally {
82              acceptor.unbind(new InetSocketAddress(port));
83          }
84      }
85  
86      public void testCloseRequest() throws Exception {
87          int port = AvailablePortFinder.getNextAvailable(1024);
88          DatagramAcceptorConfig config = new DatagramAcceptorConfig();
89          ExpiringSessionRecycler recycler = new ExpiringSessionRecycler(10, 1);
90          config.setSessionRecycler(recycler);
91  
92          MockHandler acceptorHandler = new MockHandler();
93          MockHandler connectorHandler = new MockHandler();
94  
95          acceptor.bind(new InetSocketAddress(port), acceptorHandler, config);
96  
97          try {
98              ConnectFuture future = connector.connect(new InetSocketAddress(
99                      "localhost", port), connectorHandler, config);
100             future.join();
101 
102             // Write whatever to trigger the acceptor.
103             future.getSession().write(ByteBuffer.allocate(1)).join();
104 
105             // Make sure the connection is closed before recycler closes it.
106             while (acceptorHandler.session == null) {
107                 Thread.yield();
108             }
109             acceptorHandler.session.close();
110             Assert.assertTrue(
111                     acceptorHandler.session.getCloseFuture().join(3000));
112             
113             IoSession oldSession = acceptorHandler.session;
114 
115             // Wait until all events are processed and clear the state.
116             long startTime = System.currentTimeMillis();
117             while (acceptorHandler.result.length() < 8) {
118                 Thread.yield();
119                 if (System.currentTimeMillis() - startTime > 5000) {
120                     throw new Exception();
121                 }
122             }
123             acceptorHandler.result.setLength(0);
124             acceptorHandler.session = null;
125             
126             // Write whatever to trigger the acceptor again.
127             future.getSession().write(ByteBuffer.allocate(1)).join();
128             
129             // Make sure the connection is closed before recycler closes it.
130             while (acceptorHandler.session == null) {
131                 Thread.yield();
132             }
133             acceptorHandler.session.close();
134             Assert.assertTrue(
135                     acceptorHandler.session.getCloseFuture().join(3000));
136 
137             future.getSession().close().join();
138             
139             Assert.assertNotSame(oldSession, acceptorHandler.session);
140         } finally {
141             acceptor.unbind(new InetSocketAddress(port));
142         }
143     }
144     
145     private class MockHandler extends IoHandlerAdapter {
146         public volatile IoSession session;
147         public final StringBuffer result = new StringBuffer();
148 
149         public void exceptionCaught(IoSession session, Throwable cause)
150                 throws Exception {
151             this.session = session;
152             result.append("CA");
153         }
154 
155         public void messageReceived(IoSession session, Object message)
156                 throws Exception {
157             this.session = session;
158             result.append("RE");
159         }
160 
161         public void messageSent(IoSession session, Object message)
162                 throws Exception {
163             this.session = session;
164             result.append("SE");
165         }
166 
167         public void sessionClosed(IoSession session) throws Exception {
168             this.session = session;
169             result.append("CL");
170         }
171 
172         public void sessionCreated(IoSession session) throws Exception {
173             this.session = session;
174             result.append("CR");
175         }
176 
177         public void sessionIdle(IoSession session, IdleStatus status)
178                 throws Exception {
179             this.session = session;
180             result.append("ID");
181         }
182 
183         public void sessionOpened(IoSession session) throws Exception {
184             this.session = session;
185             result.append("OP");
186         }
187     }
188 }