Coverage Report

 /*
 The contents of this file are subject to the Mozilla Public License Version 1.1 
 (the "License"); you may not use this file except in compliance with the License. 
 You may obtain a copy of the License at http://www.mozilla.org/MPL/ 
 Software distributed under the License is distributed on an "AS IS" basis, 
 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the 
 specific language governing rights and limitations under the License. 
 
 The Original Code is "ServerSocketStreamSource.java".  Description: 
 "A StreamSource that gets streams from ServerSockets." 
 
 The Initial Developer of the Original Code is University Health Network. Copyright (C) 
 2004.  All Rights Reserved. 
 
 Contributor(s): ______________________________________. 
 
 Alternatively, the contents of this file may be used under the terms of the 
 GNU General Public License (the  �GPL�), in which case the provisions of the GPL are 
 applicable instead of those above.  If you wish to allow use of your version of this 
 file only under the terms of the GPL and not to allow others to use your version 
 of this file under the MPL, indicate your decision by deleting  the provisions above 
 and replace  them with the notice and other provisions required by the GPL License.  
 If you do not delete the provisions above, a recipient may use your version of 
 this file under either the MPL or the GPL. 
 */
 
 package ca.uhn.hl7v2.protocol.impl;
 
 import java.io.IOException;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.net.SocketTimeoutException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import ca.uhn.hl7v2.protocol.TransportException;
 
 /**
  * A <code>StreamSource</code> that gets streams from ServerSockets.  This 
  * allows you to communicate over sockets that are established by the remote 
  * party (ie as a TCP/IP server).
  * 
  * @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
  * @version $Revision: 1.4 $ updated on $Date: 2009-12-19 20:01:20 $ by $Author: jamesagnew $
  */
 public class ServerSocketStreamSource extends SocketStreamSource {
 
         /** The default SO_TIMEOUT value for sockets returned by this class */
         public static final int TIMEOUT = 500;
         
     private ServerSocket myServerSocket;
     private String myExpectedAddress;
     private Socket mySocket;
     
     /**
      * @param theServerSocket a ServerSocket at which to listen for incoming connections  
      * @param theExpectedAddress the IP address from which to accept connections (null means 
      *      accept from any address) 
      * @throws TransportException
      */
     public ServerSocketStreamSource(ServerSocket theServerSocket, String theExpectedAddress) throws TransportException {
         myServerSocket = theServerSocket;
         myExpectedAddress = theExpectedAddress;
     }
 
     /** 
      * @see ca.uhn.hl7v2.protocol.impl.SocketStreamSource#getSocket()
      */
     public Socket getSocket() {
         return mySocket;
     }
 
     /** 
      * Accepts new connections on underlying ServerSocket, replacing 
      * any existing socket with the new one, blocking until a connection 
      * is available.  See {@link DualTransportConnector} for a method of 
      * connecting two <code>TransportLayer</code>s in a way that avoids deadlock.    
      * 
      * @see ca.uhn.hl7v2.protocol.StreamSource#connect()
      */
     public void connect() throws TransportException {
         Acceptor a = new Acceptor(myServerSocket, myExpectedAddress);                
         mySocket = a.waitForSocket();
     }
     
     /**
      * A thing with which waiting for inbound socket connections can 
      * be done in a separate thread.  This is needed because we may have to 
      * start waiting at two ports before pending on either.  Otherwise if 
      * we accept() in a different order than the remote system connects, 
      * we will deadlock.  
      * 
      * @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
      * @version $Revision: 1.4 $ updated on $Date: 2009-12-19 20:01:20 $ by $Author: jamesagnew $
      */
     private static class Acceptor {
         
         private static final Logger log = LoggerFactory.getLogger(Acceptor.class);
         
         private Socket mySocket;
         
         /**
          * Starts waiting in a separate thread for connections to the given 
          * ServerSocket from the given IP address.  
          * @param theServer 
          * @param theAddress IP address from which to accept connections (null
          *      means any) 
          */
         public Acceptor(final ServerSocket theServer, final String theAddress) {
             final Acceptor a = this;
             if (theAddress != null) {
                 log.info("Server socket is about to try to accept a connection from {}", theAddress);
             } else {
                 log.info("Server socket is about to try to accept a connection from any addess");
             }
 
             Runnable r = new Runnable() {
                 public void run() {
                     while (true) {
 
                         Socket s;
                         try {
 
                                 if (!theServer.isClosed()) {
                                     s = theServer.accept();
                                     s.setSoTimeout(TIMEOUT);
                                     String address = s.getInetAddress().getHostAddress();
                                     if (theAddress == null || address.equals(theAddress)) {
                                         a.setSocket(s);
                                         synchronized (a) {
                                             a.notifyAll();
                                         }
                                     } else {
                                         log.info("Ignoring connection from {}: expecting ", address, theAddress);
                                     }
                                 }
                                 
                         } catch (SocketTimeoutException e) {
                             log.debug("Socket timed out without receiving a connection");
                         } catch (IOException e) {
                             log.error("Error accepting remote connection", e); 
                         } // try-catch
 
                         if (a.getSocket() != null) {
                             log.info("Accepted connection from address: {}", a.getSocket().getInetAddress());
                             return;
                         }
 
                         if (theServer.isClosed()) {
                             log.warn("Server socket closed, aborting");
                             return;
                         }
 
                         //if there's a problem, don't fill up the log at lightning speed
                         try {
                             Thread.sleep(1000);
                         } catch (InterruptedException e2) {}
 
                     }
                 }
             };
             
             Thread thd = new Thread(r);
             thd.start();
         }
         
         public void setSocket(Socket theSocket) {
             mySocket = theSocket;
         }
         
         public Socket getSocket() {
             return mySocket;
         }
         
         /**
          * @return as getSocket(), but doesn't return until getSocket() returns 
          *  non-null.  
          */
         public Socket waitForSocket() {
             while (getSocket() == null) {
                 try {
                     synchronized (this) {
                         this.wait(100);
                     }
                 } catch (InterruptedException e) {}
             }
             return getSocket();
         }
         
     }
 
 
 }

1		/*
2		The contents of this file are subject to the Mozilla Public License Version 1.1
3		(the "License"); you may not use this file except in compliance with the License.
4		You may obtain a copy of the License at http://www.mozilla.org/MPL/
5		Software distributed under the License is distributed on an "AS IS" basis,
6		WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
7		specific language governing rights and limitations under the License.
8
9		The Original Code is "ServerSocketStreamSource.java". Description:
10		"A StreamSource that gets streams from ServerSockets."
11
12		The Initial Developer of the Original Code is University Health Network. Copyright (C)
13		2004. All Rights Reserved.
14
15		Contributor(s): ______________________________________.
16
17		Alternatively, the contents of this file may be used under the terms of the
18		GNU General Public License (the �GPL�), in which case the provisions of the GPL are
19		applicable instead of those above. If you wish to allow use of your version of this
20		file only under the terms of the GPL and not to allow others to use your version
21		of this file under the MPL, indicate your decision by deleting the provisions above
22		and replace them with the notice and other provisions required by the GPL License.
23		If you do not delete the provisions above, a recipient may use your version of
24		this file under either the MPL or the GPL.
25		*/
26
27		package ca.uhn.hl7v2.protocol.impl;
28
29		import java.io.IOException;
30		import java.net.ServerSocket;
31		import java.net.Socket;
32		import java.net.SocketTimeoutException;
33
34		import org.slf4j.Logger;
35		import org.slf4j.LoggerFactory;
36
37		import ca.uhn.hl7v2.protocol.TransportException;
38
39		/**
40		* A <code>StreamSource</code> that gets streams from ServerSockets. This
41		* allows you to communicate over sockets that are established by the remote
42		* party (ie as a TCP/IP server).
43		*
44		* @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
45		* @version $Revision: 1.4 $ updated on $Date: 2009-12-19 20:01:20 $ by $Author: jamesagnew $
46		*/
47		public class ServerSocketStreamSource extends SocketStreamSource {
48
49		/** The default SO_TIMEOUT value for sockets returned by this class */
50		public static final int TIMEOUT = 500;
51
52		private ServerSocket myServerSocket;
53		private String myExpectedAddress;
54		private Socket mySocket;
55
56		/**
57		* @param theServerSocket a ServerSocket at which to listen for incoming connections
58		* @param theExpectedAddress the IP address from which to accept connections (null means
59		* accept from any address)
60		* @throws TransportException
61		*/
62	50	public ServerSocketStreamSource(ServerSocket theServerSocket, String theExpectedAddress) throws TransportException {
63	50	myServerSocket = theServerSocket;
64	50	myExpectedAddress = theExpectedAddress;
65	50	}
66
67		/**
68		* @see ca.uhn.hl7v2.protocol.impl.SocketStreamSource#getSocket()
69		*/
70		public Socket getSocket() {
71	420	return mySocket;
72		}
73
74		/**
75		* Accepts new connections on underlying ServerSocket, replacing
76		* any existing socket with the new one, blocking until a connection
77		* is available. See {@link DualTransportConnector} for a method of
78		* connecting two <code>TransportLayer</code>s in a way that avoids deadlock.
79		*
80		* @see ca.uhn.hl7v2.protocol.StreamSource#connect()
81		*/
82		public void connect() throws TransportException {
83	60	Acceptor a = new Acceptor(myServerSocket, myExpectedAddress);
84	60	mySocket = a.waitForSocket();
85	40	}
86
87		/**
88		* A thing with which waiting for inbound socket connections can
89		* be done in a separate thread. This is needed because we may have to
90		* start waiting at two ports before pending on either. Otherwise if
91		* we accept() in a different order than the remote system connects,
92		* we will deadlock.
93		*
94		* @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
95		* @version $Revision: 1.4 $ updated on $Date: 2009-12-19 20:01:20 $ by $Author: jamesagnew $
96		*/
97	55	private static class Acceptor {
98
99	5	private static final Logger log = LoggerFactory.getLogger(Acceptor.class);
100
101		private Socket mySocket;
102
103		/**
104		* Starts waiting in a separate thread for connections to the given
105		* ServerSocket from the given IP address.
106		* @param theServer
107		* @param theAddress IP address from which to accept connections (null
108		* means any)
109		*/
110	60	public Acceptor(final ServerSocket theServer, final String theAddress) {
111	60	final Acceptor a = this;
112	60	if (theAddress != null) {
113	60	log.info("Server socket is about to try to accept a connection from {}", theAddress);
114		} else {
115	0	log.info("Server socket is about to try to accept a connection from any addess");
116		}
117
118	60	Runnable r = new Runnable() {
119		public void run() {
120		while (true) {
121
122		Socket s;
123		try {
124
125	60	if (!theServer.isClosed()) {
126	55	s = theServer.accept();
127	40	s.setSoTimeout(TIMEOUT);
128	40	String address = s.getInetAddress().getHostAddress();
129	40	if (theAddress == null \|\| address.equals(theAddress)) {
130	40	a.setSocket(s);
131	40	synchronized (a) {
132	40	a.notifyAll();
133	40	}
134		} else {
135	0	log.info("Ignoring connection from {}: expecting ", address, theAddress);
136		}
137		}
138
139	0	} catch (SocketTimeoutException e) {
140	0	log.debug("Socket timed out without receiving a connection");
141	5	} catch (IOException e) {
142	5	log.error("Error accepting remote connection", e);
143	45	} // try-catch
144
145	50	if (a.getSocket() != null) {
146	40	log.info("Accepted connection from address: {}", a.getSocket().getInetAddress());
147	40	return;
148		}
149
150	10	if (theServer.isClosed()) {
151	10	log.warn("Server socket closed, aborting");
152	10	return;
153		}
154
155		//if there's a problem, don't fill up the log at lightning speed
156		try {
157	0	Thread.sleep(1000);
158	0	} catch (InterruptedException e2) {}
159
160		}
161		}
162		};
163
164	60	Thread thd = new Thread(r);
165	60	thd.start();
166	60	}
167
168		public void setSocket(Socket theSocket) {
169	40	mySocket = theSocket;
170	40	}
171
172		public Socket getSocket() {
173	4000	return mySocket;
174		}
175
176		/**
177		* @return as getSocket(), but doesn't return until getSocket() returns
178		* non-null.
179		*/
180		public Socket waitForSocket() {
181	3870	while (getSocket() == null) {
182		try {
183	3830	synchronized (this) {
184	3830	this.wait(100);
185	3810	}
186	3810	} catch (InterruptedException e) {}
187		}
188	40	return getSocket();
189		}
190
191		}
192
193
194		}