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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  package org.apache.mina.transport.bio;
21  
22  import java.io.IOException;
23  import java.net.SocketAddress;
24  import java.nio.ByteBuffer;
25  
26  import org.apache.mina.api.IoFuture;
27  import org.apache.mina.api.IoSession;
28  import org.apache.mina.api.IoSessionConfig;
29  import org.apache.mina.service.idlechecker.IdleChecker;
30  import org.apache.mina.session.AbstractIoSession;
31  import org.apache.mina.session.DefaultWriteRequest;
32  import org.apache.mina.session.WriteRequest;
33  
34  /**
35   * A {@link IoSession} for {@link BioUdpServer}
36   * 
37   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
38   */
39  public class BioUdpSession extends AbstractIoSession {
40  
41      private SocketAddress remoteAddress;
42  
43      public BioUdpSession(SocketAddress remoteAddress, BioUdpServer service, IdleChecker idleChecker) {
44          super(service, idleChecker);
45          this.remoteAddress = remoteAddress;
46      }
47  
48      /**
49       * {@inheritDoc}
50       */
51      @Override
52      public SocketAddress getRemoteAddress() {
53          return remoteAddress;
54      }
55  
56      /**
57       * {@inheritDoc}
58       */
59      @Override
60      public SocketAddress getLocalAddress() {
61          return ((BioUdpServer) getService()).getBoundAddress();
62      }
63  
64      /**
65       * {@inheritDoc}
66       */
67      @Override
68      public IoFuture<Void> close(boolean immediately) {
69          processSessionClosed();
70          return null;
71      }
72  
73      /**
74       * {@inheritDoc}
75       */
76      @Override
77      public void suspendRead() {
78          throw new IllegalStateException("not supported");
79      }
80  
81      /**
82       * {@inheritDoc}
83       */
84      @Override
85      public void suspendWrite() {
86          throw new IllegalStateException("not supported");
87  
88      }
89  
90      /**
91       * {@inheritDoc}
92       */
93      @Override
94      public void resumeRead() {
95          throw new IllegalStateException("not supported");
96      }
97  
98      /**
99       * {@inheritDoc}
100      */
101     @Override
102     public void resumeWrite() {
103         throw new IllegalStateException("not supported");
104     }
105 
106     /**
107      * {@inheritDoc}
108      */
109     @Override
110     public boolean isReadSuspended() {
111         return false;
112     }
113 
114     /**
115      * {@inheritDoc}
116      */
117     @Override
118     public boolean isWriteSuspended() {
119         return false;
120     }
121 
122     /**
123      * {@inheritDoc}
124      */
125     @Override
126     public IoSessionConfig getConfig() {
127         return config;
128     }
129 
130     /**
131      * {@inheritDoc}
132      */
133     @Override
134     public WriteRequest enqueueWriteRequest(WriteRequest writeRequest) {
135 
136         try {
137             int written = ((BioUdpServer) getService()).channel.send((ByteBuffer) writeRequest.getMessage(),
138                     remoteAddress);
139             if (written > 0) {
140                 incrementWrittenBytes(written);
141 
142                 final Object highLevel = ((DefaultWriteRequest) writeRequest).getOriginalMessage();
143 
144                 if (highLevel != null) {
145                     processMessageSent(highLevel);
146                 }
147 
148             } else {
149                 processException(new RuntimeException("unable to write"));
150             }
151         } catch (IOException e) {
152             processException(e);
153         }
154 
155         return writeRequest;
156 
157     }
158 }