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.InetAddress;
22 import java.net.ServerSocket;
23 import java.net.Socket;
24 import java.net.URI;
25 import java.net.URISyntaxException;
26
27 import javax.net.ServerSocketFactory;
28 import javax.net.SocketFactory;
29
30 import org.activeio.SynchChannel;
31 import org.activeio.SynchChannelFactory;
32 import org.activeio.SynchChannelServer;
33
34 /***
35 * A TcpSynchChannelFactory creates {@see org.activeio.net.TcpSynchChannel}
36 * and {@see org.activeio.net.TcpSynchChannelServer} objects.
37 *
38 * @version $Revision$
39 */
40 public class SocketSynchChannelFactory implements SynchChannelFactory {
41
42 protected static final int DEFAULT_BACKLOG = 500;
43
44 private final SocketFactory socketFactory;
45 private final ServerSocketFactory serverSocketFactory;
46 private int backlog = DEFAULT_BACKLOG;
47
48 public SocketSynchChannelFactory() {
49 this(SocketFactory.getDefault(), ServerSocketFactory.getDefault());
50 }
51
52 public SocketSynchChannelFactory(SocketFactory socketFactory, ServerSocketFactory serverSocketFactory) {
53 this.socketFactory = socketFactory;
54 this.serverSocketFactory = serverSocketFactory;
55 }
56
57 /***
58 * Uses the {@param location}'s host and port to create a tcp connection to a remote host.
59 *
60 * @see org.activeio.SynchChannelFactory#openSynchChannel(java.net.URI)
61 */
62 public SynchChannel openSynchChannel(URI location) throws IOException {
63 Socket socket=null;
64 socket = socketFactory.createSocket(location.getHost(), location.getPort());
65 return createSynchChannel(socket);
66 }
67
68 /***
69 * @param socket
70 * @return
71 * @throws IOException
72 */
73 protected SynchChannel createSynchChannel(Socket socket) throws IOException {
74 return new SocketSynchChannel(socket);
75 }
76
77 /***
78 * Binds a server socket a the {@param location}'s port.
79 *
80 * @see org.activeio.SynchChannelFactory#bindSynchChannel(java.net.URI)
81 */
82 public SynchChannelServer bindSynchChannel(URI bindURI) throws IOException {
83
84 String host = bindURI.getHost();
85 InetAddress addr;
86 if( (host == null || host.length() == 0 || host.equals("localhost") ) ) {
87 addr = InetAddress.getLocalHost();
88 } else {
89 addr = InetAddress.getByName(host);
90 }
91 ServerSocket serverSocket;
92
93 if (addr.equals(InetAddress.getLocalHost())) {
94 serverSocket = serverSocketFactory.createServerSocket(bindURI.getPort(), backlog);
95 } else {
96 serverSocket = serverSocketFactory.createServerSocket(bindURI.getPort(), backlog, addr);
97 }
98
99 URI connectURI=bindURI;
100 try {
101 connectURI = URISupport.changeHost(connectURI, addr.getHostName());
102 connectURI = URISupport.changePort(connectURI, serverSocket.getLocalPort());
103 } catch (URISyntaxException e) {
104 throw (IOException)new IOException("Could build connect URI: "+e).initCause(e);
105 }
106
107 return new SocketSynchChannelServer(serverSocket, bindURI, connectURI);
108 }
109
110 /***
111 * @return Returns the backlog.
112 */
113 public int getBacklog() {
114 return backlog;
115 }
116
117 /***
118 * @param backlog
119 * The backlog to set.
120 */
121 public void setBacklog(int backlog) {
122 this.backlog = backlog;
123 }
124
125
126 }