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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/filter/TCPReader.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filter/TCPReader.java (file contents):
Revision 1.4 by ajm, Thu Nov 30 02:38:09 2000 UTC vs.
Revision 1.17 by tdb, Sat May 18 18:16:02 2002 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream central monitoring system
3	+	* Copyright (C) 2000-2002 i-scream
4	+	*
5	+	* This program is free software; you can redistribute it and/or
6	+	* modify it under the terms of the GNU General Public License
7	+	* as published by the Free Software Foundation; either version 2
8	+	* of the License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful,
11	+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13	+	* GNU General Public License for more details.
14	+	*
15	+	* You should have received a copy of the GNU General Public License
16	+	* along with this program; if not, write to the Free Software
17	+	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18	+	*/
19	+
20		//---PACKAGE DECLARATION---
21	<	package uk.ac.ukc.iscream.filter;
21	>	package uk.org.iscream.cms.server.filter;
22
23		//---IMPORTS---
24	<	import uk.ac.ukc.iscream.core.*;
25	<	import uk.ac.ukc.iscream.filter.*;
24	>	import uk.org.iscream.cms.server.core.*;
25	>	import uk.org.iscream.cms.server.componentmanager.*;
26	>	import uk.org.iscream.cms.server.filter.*;
27		import java.net.Socket;
28		import java.net.ServerSocket;
29		import java.io.OutputStream;
30		import java.io.IOException;
31		import java.net.InetAddress;
32		import java.net.UnknownHostException;
33	<	import org.omg.CORBA.*;
14	<	import org.omg.CosNaming.*;
15	<	import uk.ac.ukc.iscream.util.*;
33	>	import uk.org.iscream.cms.server.util.*;
34
35		/**
36	<	* A socket listener to listen for new hosts registering with the system.
19	<	* When a host makes a connection, the connecton is past to an instance
20	<	* of the HostInit class, which handles further communication.
36	>	* Reads TCP Heartbeats from the host applications.
37		*
38		* @author  $Author$
39		* @version $Id$
#	Line 35 | Line 51 | class TCPReader extends Thread {
51
52		//---CONSTRUCTORS---
53
54	<	/**
55	<	* Constructs a new listener
54	>	/**
55	>	* Constructs a new TCPReader
56		*
57	<	* @param logger a reference to the logger we are using
58	<	* @param configManager a reference to the ConfigurationManager we are using
59	<	* @param port The port that the server will listen on.
60	<	*/
61	<	public TCPReader(int port, Filter parent) {
57	>	* @param queue A reference to our Queue
58	>	* @param port The port that the TCPReader will listen on
59	>	*/
60	>	public TCPReader(int port, Queue queue) {
61	>	// set the Thread name
62	>	setName("filter.TCPReader");
63	>
64		_port = port;
65	<	_parent = parent;
65	>	_queue = queue;
66		_logger.write(toString(), Logger.SYSINIT, "started");
67		}
68
#	Line 52 | Line 70 | class TCPReader extends Thread {
70
71		//---PUBLIC METHODS---
72
73	<	/**
74	<	* The run() method is the main loop for this thread, and we
75	<	* will remain in here until such a point as something goes
76	<	* wrong with the listening. After initially setting up the
77	<	* ServerSocket we go round a while loop receiving connections
78	<	* and then passing them off to other processes to deal with.
79	<	*/
73	>	/**
74	>	* The run() method is the main loop for this thread, and we
75	>	* will remain in here until such a point as something goes
76	>	* wrong with the listening. After initially setting up the
77	>	* ServerSocket we go round a while loop receiving connections
78	>	* and then passing them off to other processes to deal with.
79	>	*/
80		public void run(){
81	+	// setup an empty ACL defaulting to ALLOW
82	+	ACL acl = new ACL(ACL.ALLOW);
83	+
84	+	// Setup the ServerSocket so that clients can connect
85		ServerSocket listenPort=null;
64	–	// We use this boolean so we can break out of the while loop if we want
65	–	boolean run = true;
86		try{
87	<	// Setup the ServerSocket so that clients can connect
68	<	listenPort = new ServerSocket(_port);
87	>	listenPort = new ACLServerSocket(acl, _port);
88		}
89		catch(IOException e){
90	+	_logger.write(toString(), Logger.FATAL, "Failed to setup ServerSocket: " + e);
91	+	return;
92		}
93	<	// Log what machine/port we're listening on
94	<	try{
95	<	_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on "
96	<	+InetAddress.getLocalHost().getHostName()
97	<	+"/"+InetAddress.getLocalHost().getHostAddress()
98	<	+" port "+listenPort.getLocalPort());
99	<	}
100	<	catch(UnknownHostException e){
101	<	_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on UnknownHost "
102	<	+"port "+listenPort.getLocalPort());
103	<	}
104	<	// Loop round constantly until we decide to stop
93	>
94	>	// Log what machine/port we're listening on
95	>	try{
96	>	_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on "
97	>	+InetAddress.getLocalHost().getHostName()
98	>	+"/"+InetAddress.getLocalHost().getHostAddress()
99	>	+" port "+listenPort.getLocalPort());
100	>	}
101	>	catch(UnknownHostException e){
102	>	_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on UnknownHost "
103	>	+"port "+listenPort.getLocalPort());
104	>	}
105	>
106	>	// We use this boolean so we can break out of the while loop if we want
107	>	boolean run = true;
108	>
109	>	// Loop round constantly until we decide to stop
110	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
111	>	String stringACL = "";
112	>	String newStringACL = "";
113		while(run){
114	<	Socket hostSocket=null;
114	>	// get hold of the ACL in the configuration
115	>	try {
116	>	newStringACL = cp.getProperty("Filter." + FilterMain.NAME, "Filter.TCPACL");
117	>	}
118	>	catch(PropertyNotFoundException e) {
119	>	// if we can't find it, we'll just use a null ACL
120	>	newStringACL = "";
121	>	_logger.write(toString(), Logger.WARNING, "No ACL found for TCPReader, using empty ACL instead: " + e);
122	>	}
123	>	// check to see if the ACL has changed
124	>	if(!newStringACL.equals(stringACL)) {
125	>	_logger.write(toString(), Logger.SYSMSG, "Reloading Access Control List");
126	>	// clear the ACL
127	>	acl.clear();
128	>	// set the default to something sane
129	>	acl.setDefaultMode(ACL.ALLOW);
130	>	// add the new ACL (this may change the default)
131	>	acl.add(newStringACL);
132	>	stringACL = newStringACL;
133	>	}
134	>	Socket hostSocket=null;
135		try{
136	<	_logger.write(toString(), Logger.SYSMSG, "Waiting for Connection");
137	<	// This will block until a host connects - at which point we get a Socket
136	>	_logger.write(toString(), Logger.DEBUG, "Waiting for Connection");
137	>	// This will block until a host connects - at which point we get a Socket
138		hostSocket = listenPort.accept();
139	<	_logger.write(toString(), Logger.SYSMSG, "Connection accepted from: " + hostSocket.toString());
139	>	_logger.write(toString(), Logger.DEBUG, "Connection accepted from: " + hostSocket.toString());
140		}
141		catch(IOException e){
142	<	// Something went wrong with the ServerSocket, so we'll stop listening
142	>	// Something went wrong with the ServerSocket, so we'll stop listening
143		run=false;
144		}
145	<	// If we've stopped on the line above we won't want to try this !
145	>	// If we've stopped on the line above we won't want to try this !
146		if(run){
147	<	try {
148	<	// Setup the HostInit so it can carry on communications with the host
149	<	TCPReaderInit init = new TCPReaderInit(hostSocket, _parent);
150	<	// and start it
147	>	try {
148	>	// Setup the TCPReaderInit and start it
149	>	TCPReaderInit init = new TCPReaderInit(hostSocket, _queue);
150	>	// and start it
151		init.start();
152		} catch (IOException e) {
153		_logger.write(toString(), Logger.ERROR, e.toString());
154		}
155		}
156		}
157	<	// Best log the fact that we're stopping
157	>	// Best log the fact that we're stopping
158		_logger.write(toString(), Logger.FATAL, "Fatal error, shutdown pending");
159		}
160
#	Line 113 | Line 162 | class TCPReader extends Thread {
162		* Overrides the {@link java.lang.Object#toString() Object.toString()}
163		* method to provide clean logging (every class should have this).
164		*
165	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
166	+	* to format the toString()
167	+	*
168		* @return the name of this class and its CVS revision
169		*/
170		public String toString() {
171	<	return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
171	>	return FormatName.getName(
172	>	_name,
173	>	getClass().getName(),
174	>	REVISION);
175		}
176
177		//---PRIVATE METHODS---
#	Line 126 | Line 181 | class TCPReader extends Thread {
181		//---ATTRIBUTES---
182
183		/**
184	<	* A reference to the logger the system is using
184	>	* This is the friendly identifier of the
185	>	* component this class is running in.
186	>	* eg, a Filter may be called "filter1",
187	>	* If this class does not have an owning
188	>	* component,  a name from the configuration
189	>	* can be placed here.  This name could also
190	>	* be changed to null for utility classes.
191		*/
192	<	Logger _logger = ReferenceManager.getInstance().getLogger();
192	>	private String _name = FilterMain.NAME;
193	>
194	>	/**
195	>	* This holds a reference to the
196	>	* system logger that is being used.
197	>	*/
198	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
199
200		/**
201	<	* The port on which the server should listen.
202	<	*/
201	>	* The port on which the server should listen.
202	>	*/
203		private int _port;
204
205	<	private Filter _parent;
205	>	/**
206	>	* A reference to our Queue
207	>	*/
208	>	private Queue _queue;
209
210		//---STATIC ATTRIBUTES---
211

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