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1   /***
2    * 
3    * Copyright 2004 Hiram Chirino
4    * 
5    * Licensed under the Apache License, Version 2.0 (the "License"); 
6    * you may not use this file except in compliance with the License. 
7    * You may obtain a copy of the License at 
8    * 
9    * http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS, 
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
14   * See the License for the specific language governing permissions and 
15   * limitations under the License. 
16   * 
17   **/
18  
19  package org.activeio.net;
20  
21  import java.io.IOException;
22  import java.net.ServerSocket;
23  import java.net.Socket;
24  import java.net.SocketException;
25  import java.net.SocketTimeoutException;
26  import java.net.URI;
27  
28  import org.activeio.Channel;
29  import org.activeio.SynchChannelServer;
30  
31  /***
32   * A SynchChannelServer that creates
33   * {@see org.activeio.net.TcpSynchChannel}objects from accepted
34   * tcp socket connections.
35   * 
36   * @version $Revision$
37   */
38  public class SocketSynchChannelServer implements SynchChannelServer {
39  
40      private ServerSocket serverSocket;
41      private int curentSoTimeout = 0;
42      private final URI bindURI;
43      private final URI connectURI;
44  
45  
46      /***
47       * @param serverSocket2
48       * @param bindURI2
49       * @param connectURI2
50       */
51      public SocketSynchChannelServer(ServerSocket serverSocket, URI bindURI, URI connectURI) {
52          this.serverSocket=serverSocket;
53          this.bindURI=bindURI;
54          this.connectURI=connectURI;
55      }
56  
57      public Channel accept(long timeout) throws IOException {
58          try {
59              if (timeout == SynchChannelServer.WAIT_FOREVER_TIMEOUT)
60                  setSoTimeout(0);
61              else if (timeout == SynchChannelServer.NO_WAIT_TIMEOUT)
62                  setSoTimeout(1);
63              else
64                  setSoTimeout((int) timeout);
65  
66              Socket socket = serverSocket.accept();
67              return createChannel(socket);
68  
69          } catch (SocketTimeoutException ignore) {
70          }
71          return null;
72      }
73  
74      protected Channel createChannel(Socket socket) throws IOException {
75          return new SocketSynchChannel(socket);
76      }
77  
78      private void setSoTimeout(int i) throws SocketException {
79          if (curentSoTimeout != i) {
80              serverSocket.setSoTimeout(i);
81              curentSoTimeout = i;
82          }
83      }
84  
85      /***
86       * @see org.activeio.Disposable#dispose()
87       */
88      public void dispose() {
89          if (serverSocket == null)
90              return;
91          try {
92              serverSocket.close();
93          } catch (IOException ignore) {
94          }
95          serverSocket = null;
96      }
97  
98      /***
99       * @return Returns the bindURI.
100      */
101     public URI getBindURI() {
102         return bindURI;
103     }
104 
105     /***
106      * @return Returns the connectURI.
107      */
108     public URI getConnectURI() {
109         return connectURI;
110     }
111 
112     public void start() throws IOException {
113     }
114 
115     public void stop(long timeout) throws IOException {
116     }
117     
118     public Object narrow(Class target) {
119         if( target.isAssignableFrom(getClass()) ) {
120             return this;
121         }
122         return null;
123     }    
124     
125     public String toString() {
126         return "Socket Server: "+getConnectURI();
127     }    
128 }