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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  package org.activeio.net;
19  
20  import java.io.IOException;
21  import java.net.DatagramSocket;
22  import java.net.InetAddress;
23  import java.net.URI;
24  
25  import org.activeio.SynchChannel;
26  import org.activeio.SynchChannelFactory;
27  import org.activeio.SynchChannelServer;
28  
29  /***
30   * A TcpSynchChannelFactory creates {@see org.activeio.net.TcpSynchChannel}
31   * and {@see org.activeio.net.TcpSynchChannelServer} objects.
32   * 
33   * @version $Revision$
34   */
35  public class DatagramSocketSynchChannelFactory implements SynchChannelFactory {
36  
37      /***
38       * Uses the {@param location}'s host and port to create a tcp connection to a remote host.
39       * 
40       * @see org.activeio.SynchChannelFactory#openSynchChannel(java.net.URI)
41       */
42      public SynchChannel openSynchChannel(URI location) throws IOException {
43          DatagramSocket socket=null;
44          socket = new DatagramSocket();
45          if( location != null ) {
46              InetAddress address = InetAddress.getByName(location.getHost());
47              socket.connect(address, location.getPort());
48          }
49          return createSynchChannel(socket);
50      }
51  
52      /***
53       * Uses the {@param location}'s host and port to create a tcp connection to a remote host.
54       * 
55       */
56      public SynchChannel openSynchChannel(URI location, URI localLocation) throws IOException {
57          DatagramSocket socket=null;
58          InetAddress address = InetAddress.getByName(localLocation.getHost());
59          socket = new DatagramSocket(localLocation.getPort(), address);
60  
61          if( location != null ) {
62              address = InetAddress.getByName(location.getHost());
63              socket.connect(address, location.getPort());
64          }
65          return createSynchChannel(socket);
66      }
67  
68      /***
69       * @param socket
70       * @return
71       * @throws IOException
72       */
73      protected SynchChannel createSynchChannel(DatagramSocket socket) throws IOException {
74          return new DatagramSocketSynchChannel(socket);
75      }
76  
77      /***
78       * @throws IOException allways thrown.
79       * @see org.activeio.SynchChannelFactory#bindSynchChannel(java.net.URI)
80       */
81      public SynchChannelServer bindSynchChannel(URI location) throws IOException {
82          throw new IOException("A SynchChannelServer is not available for this channel.");
83      }
84  
85  }