Source Code Cross Referenced for TimedSocketFactory.java in  » EJB-Server-JBoss-4.2.1 » naming » org » jnp » interfaces » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » naming » org.jnp.interfaces 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * JBoss, Home of Professional Open Source.
003:         * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004:         * as indicated by the @author tags. See the copyright.txt file in the
005:         * distribution for a full listing of individual contributors.
006:         *
007:         * This is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU Lesser General Public License as
009:         * published by the Free Software Foundation; either version 2.1 of
010:         * the License, or (at your option) any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this software; if not, write to the Free
019:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021:         */
022:        package org.jnp.interfaces;
023:
024:        import java.io.IOException;
025:        import java.net.ConnectException;
026:        import java.net.InetAddress;
027:        import java.net.Socket;
028:        import java.net.UnknownHostException;
029:        import java.util.Hashtable;
030:        import javax.net.SocketFactory;
031:
032:        /** A concrete implementation of the SocketFactory that supports a configurable
033:         timeout for the initial socket connection as well as the SO_TIMEOUT used to
034:         determine how long a read will block waiting for data.
035:
036:         @author Scott.Stark@jboss.org
037:         @version $Revision: 57199 $
038:         */
039:        public class TimedSocketFactory extends SocketFactory {
040:            public static final String JNP_TIMEOUT = "jnp.timeout";
041:            public static final String JNP_SO_TIMEOUT = "jnp.sotimeout";
042:
043:            /** The connection timeout in milliseconds */
044:            protected int timeout = 0;
045:            /** The SO_TIMEOUT in milliseconds */
046:            protected int soTimeout = 0;
047:
048:            /** Creates a new instance of TimedSocketFactory */
049:            public TimedSocketFactory() {
050:            }
051:
052:            public TimedSocketFactory(Hashtable env) {
053:                String value = (String) env.get(JNP_TIMEOUT);
054:                if (value != null)
055:                    timeout = Integer.parseInt(value);
056:                value = (String) env.get(JNP_SO_TIMEOUT);
057:                if (value != null)
058:                    soTimeout = Integer.parseInt(value);
059:            }
060:
061:            public Socket createSocket(String host, int port)
062:                    throws IOException, UnknownHostException {
063:                InetAddress hostAddr = InetAddress.getByName(host);
064:                return this .createSocket(hostAddr, port, null, 0);
065:            }
066:
067:            public Socket createSocket(InetAddress hostAddr, int port)
068:                    throws IOException {
069:                return this .createSocket(hostAddr, port, null, 0);
070:            }
071:
072:            public Socket createSocket(String host, int port,
073:                    InetAddress localAddr, int localPort) throws IOException,
074:                    UnknownHostException {
075:                InetAddress hostAddr = InetAddress.getByName(host);
076:                return this .createSocket(hostAddr, port, localAddr, localPort);
077:            }
078:
079:            public Socket createSocket(InetAddress hostAddr, int port,
080:                    InetAddress localAddr, int localPort) throws IOException {
081:                Socket socket = null;
082:                if (timeout <= 0)
083:                    socket = new Socket(hostAddr, port, localAddr, localPort);
084:                else
085:                    socket = createSocket(hostAddr, port, localAddr, localPort,
086:                            timeout);
087:
088:                socket.setSoTimeout(soTimeout);
089:                return socket;
090:            }
091:
092:            protected Socket createSocket(InetAddress hostAddr, int port,
093:                    InetAddress localAddr, int localPort, int connectTimeout)
094:                    throws IOException {
095:                ConnectThread t = new ConnectThread();
096:                Socket socket = t.createSocket(hostAddr, port, localAddr,
097:                        localPort, connectTimeout);
098:                return socket;
099:            }
100:
101:            /** A subclass of Thread used to time the blocking connect operation
102:             and notify the thread attempting the socket connect of a timeout.
103:             */
104:            class ConnectThread extends Thread {
105:                IOException ex;
106:                InetAddress hostAddr;
107:                InetAddress localAddr;
108:                int port;
109:                int localPort;
110:                int connectTimeout;
111:                Socket socket;
112:
113:                ConnectThread() {
114:                    super ("JNP ConnectThread");
115:                    super .setDaemon(true);
116:                }
117:
118:                /** Perform the connection in a background thread and wait upto
119:                 connectTimeout milliseconds for it to complete before throwing
120:                 a ConnectionException
121:                 */
122:                Socket createSocket(InetAddress hostAddr, int port,
123:                        InetAddress localAddr, int localPort, int connectTimeout)
124:                        throws IOException {
125:                    this .hostAddr = hostAddr;
126:                    this .port = port;
127:                    this .localAddr = localAddr;
128:                    this .localPort = localPort;
129:                    this .connectTimeout = connectTimeout;
130:
131:                    try {
132:                        synchronized (this ) {
133:                            // Perform the socket connection in a background thread
134:                            this .start();
135:                            // Wait for upto connectTimeout milliseconds for the connection
136:                            this .wait(connectTimeout);
137:                        }
138:                    } catch (InterruptedException e) {
139:                        throw new ConnectException("Connect attempt timed out");
140:                    }
141:
142:                    // See if the connect thread exited due to an exception
143:                    if (ex != null)
144:                        throw ex;
145:                    // If socket is null we timed out while waiting
146:                    if (socket == null)
147:                        throw new ConnectException("Connect attempt timed out");
148:
149:                    return socket;
150:                }
151:
152:                public void run() {
153:                    try {
154:                        socket = new Socket(hostAddr, port, localAddr,
155:                                localPort);
156:                        synchronized (this ) {
157:                            this .notify();
158:                        }
159:                    } catch (IOException e) {
160:                        this.ex = e;
161:                    }
162:                }
163:            }
164:        }
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