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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/filtermanager/HostInit.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filtermanager/HostInit.java (file contents):
Revision 1.5 by tdb, Thu Nov 16 18:14:05 2000 UTC vs.
Revision 1.37 by tdb, Thu Feb 27 17:04:24 2003 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream central monitoring system
3	+	* http://www.i-scream.org.uk
4	+	* Copyright (C) 2000-2002 i-scream
5	+	*
6	+	* This program is free software; you can redistribute it and/or
7	+	* modify it under the terms of the GNU General Public License
8	+	* as published by the Free Software Foundation; either version 2
9	+	* of the License, or (at your option) any later version.
10	+	*
11	+	* This program is distributed in the hope that it will be useful,
12	+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14	+	* GNU General Public License for more details.
15	+	*
16	+	* You should have received a copy of the GNU General Public License
17	+	* along with this program; if not, write to the Free Software
18	+	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19	+	*/
20	+
21		//---PACKAGE DECLARATION---
22	+	package uk.org.iscream.cms.server.filtermanager;
23
24		//---IMPORTS---
25	<	import uk.ac.ukc.iscream.core.*;
26	<	import java.net.Socket;
27	<	import java.io.InputStream;
28	<	import java.io.OutputStream;
29	<	import java.io.IOException;
25	>	import uk.org.iscream.cms.server.core.*;
26	>	import uk.org.iscream.cms.server.filter.*;
27	>	import uk.org.iscream.cms.util.*;
28	>	import uk.org.iscream.cms.server.componentmanager.*;
29	>	import java.net.*;
30		import java.io.*;
31	+	import java.util.*;
32
33		/**
34	<	* <ONE LINE DESCRIPTION>
35	<	* <DETAILED DESCRIPTION>
34	>	* Handles setting up a host.
35	>	* This class provides a host with appropriate configuration
36	>	* and a reference to a Filter to which it should pass data.
37		*
38		* @author  $Author$
39		* @version $Id$
#	Line 28 | Line 51 | class HostInit extends Thread {
51
52		//---CONSTRUCTORS---
53
54	<	public HostInit(Socket socket, Configurator configurator, Logger logger) throws IOException {
55	<	_configurator = configurator;
56	<	_logger = logger;
54	>	/**
55	>	* Construct a new HostInit.
56	>	*
57	>	* @param socket The socket to which the host is connected
58	>	*/
59	>	public HostInit(Socket socket) throws IOException {
60	>	// set the Thread name
61	>	setName("filtermanager.HostInit");
62	>
63		_socket = socket;
64	+	// setup reader & writer
65		_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
66	<	_socketOut = new PrintWriter(_socket.getOutputStream());
66	>	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
67		_logger.write(toString(), Logger.SYSINIT, "created");
68		}
69
70		//---PUBLIC METHODS---
71
72	+	/**
73	+	* Main method in this class, which handles communicating with
74	+	* the host to determine it's setup.
75	+	*/
76		public void run() {
77	+	// get a hook on the config proxy
78	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
79	+	// this is our config name
80	+	String configName = "Host." + _socket.getInetAddress().getHostName().toLowerCase();
81		try {
82	<	String inBound = _socketIn.readLine();
83	<	if (!inBound.equals("STARTCONFIG")) {
84	<	_socketOut.println("ERROR");
85	<	_socketOut.flush();
86	<	throw new IOException("Protocol Error");
87	<	}
88	<
89	<	Configuration myConfig = _configurator.getConfiguration(_socket.getInetAddress().getHostName().toLowerCase());
90	<	if (myConfig == null) {
91	<	_socketOut.println("ERROR");
92	<	throw new IOException("No Configuration File For Host");
93	<	} else {
94	<	_socketOut.println("OK");
95	<	_socketOut.flush();
96	<
97	<	// get lastmodified
98	<	inBound = _socketIn.readLine();
99	<	if(!inBound.equals("LASTMODIFIED")) {
100	<	// protocol error
101	<	_socketOut.println("ERROR");
102	<	_socketOut.flush();
103	<	throw new IOException("Protocol Error");
82	>	// look for a command:
83	>	// STARTCONFIG - to get a configuration
84	>	// CHECKCONFIG - to check a configuration
85	>	// END - to finish
86	>	String cmd = getInBound();
87	>	while(!cmd.equals("END")) {
88	>	if(cmd.equals("STARTCONFIG")) {
89	>	// respond to STARTCONFIG
90	>	_socketOut.println("OK");
91	>
92	>	// try for LASTMODIFIED
93	>	getInBound("LASTMODIFIED");
94	>	_socketOut.println(cp.getLastModified(configName));
95	>
96	>	// try for FILELIST
97	>	getInBound("FILELIST");
98	>	_socketOut.println(cp.getFileList(configName));
99	>
100	>	// try for FQDN
101	>	getInBound("FQDN");
102	>	_socketOut.println(_socket.getInetAddress().getHostName().toLowerCase());
103	>
104	>	// get properties
105	>	String reqProperty = getInBound();
106	>	while(!reqProperty.equals("ENDCONFIG")) {
107	>	// get the property
108	>	try {
109	>	String returnedProperty = cp.getProperty(configName, "Host."+reqProperty);
110	>	_socketOut.println(returnedProperty);
111	>	} catch (PropertyNotFoundException e) {
112	>	_socketOut.println("ERROR");
113	>	}
114	>	// get the next request
115	>	reqProperty = _socketIn.readLine();
116	>	}
117	>	_logger.write(toString(), Logger.SYSMSG, "configured host");
118	>	_socketOut.println("OK");
119	>
120	>	// get filter reference
121	>	getInBound("FILTER");
122	>	// send info
123	>	String filterList = cp.getProperty(configName, "Host.filter");
124	>	FilterInfo filterInfoRef = null;
125	>	String filter = null;
126	>	StringTokenizer st = new StringTokenizer(filterList, ";");
127	>	while (filterInfoRef==null && st.hasMoreTokens()) {
128	>	filter = st.nextToken();
129	>	_logger.write(toString(), Logger.DEBUG, " looking for filter- " + filter);
130	>	try {
131	>	filterInfoRef = FilterInfoHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.FilterInfo\\." + filter));
132	>	} catch (ComponentCORBAException e) {
133	>	_logger.write(toString(), Logger.DEBUG, " unable to find filter- " + filter);
134	>	}
135	>	}
136	>
137	>	// hopefully we found a filter
138	>	if(filterInfoRef != null) {
139	>	_logger.write(toString(), Logger.DEBUG, " found filter- " + filter);
140	>	try {
141	>	// tell the host about it...
142	>	_socketOut.println(filterInfoRef.getHostName() + ";"
143	>	+ filterInfoRef.getUDPPort());
144	>	}
145	>	catch(org.omg.CORBA.COMM_FAILURE e) {
146	>	// failed to talk to filter, lets signal an error
147	>	_socketOut.println("ERROR");
148	>	throw new IOException("error communicating with filter - " + e);
149	>	}
150	>	}
151	>	else {
152	>	// ...or throw a wobbly (and tell the host!)
153	>	_socketOut.println("ERROR");
154	>	throw new IOException("unable to find filter for host");
155	>	}
156	>
157		}
158	<	else {
159	<	// send info
160	<	_socketOut.println(myConfig.getLastModified());
161	<	_socketOut.flush();
162	<	}
163	<
164	<	// get properties
165	<	inBound = _socketIn.readLine();
166	<	while(!inBound.equals("ENDCONFIG")) {
167	<
168	<	// get the property
158	>	else if(cmd.equals("CHECKCONFIG")) {
159	>	// respond to CHECKCONFIG
160	>	_socketOut.println("OK");
161	>
162	>	// try for {filelist}
163	>	String filelist = getInBound();
164	>	_socketOut.println("OK");
165	>
166	>	// try for {lastModified}
167	>	String lastModified = getInBound();
168	>	long lastmod;
169		try {
170	<	String returnedProperty = myConfig.getProperty(inBound);
171	<
172	<	_socketOut.println(returnedProperty);
82	<	_socketOut.flush();
83	<
84	<	} catch (org.omg.CORBA.MARSHAL e) {
170	>	lastmod = Long.parseLong(lastModified);
171	>	}
172	>	catch(NumberFormatException e) {
173		_socketOut.println("ERROR");
174	<	_socketOut.flush();
174	>	throw new IOException("Last Modified invalid: " + e);
175		}
176	<	inBound = _socketIn.readLine();
176	>
177	>	// check to see if a config update has happen
178	>	boolean newConfig = _configManager.isModified(filelist, lastmod);
179	>	if(newConfig) {
180	>	// new config !
181	>	_socketOut.println("EXPIRED");
182	>	}
183	>	else {
184	>	// nothing has changed
185	>	_socketOut.println("OK");
186	>	}
187		}
188	<	_logger.write(toString(), Logger.SYSMSG, "configured host");
189	<	_socketOut.println("OK");
190	<	_socketOut.flush();
188	>	else {
189	>	_socketOut.println("ERROR");
190	>	}
191	>	// get the next command
192	>	cmd = getInBound();
193		}
194	+	// respond to END
195	+	_socketOut.println("OK");
196
197		} catch (Exception e) {
198	<	_logger.write(toString(), Logger.ERROR, e.toString());
198	>	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
199		}
200
99	–	_socketOut.flush();
201		// Disconnect streams & socket
202		try {
203		_socketIn.close();
#	Line 112 | Line 213 | class HostInit extends Thread {
213		* Overrides the {@link java.lang.Object#toString() Object.toString()}
214		* method to provide clean logging (every class should have this).
215		*
216	+	* This uses the uk.org.iscream.cms.util.NameFormat class
217	+	* to format the toString()
218	+	*
219		* @return the name of this class and its CVS revision
220		*/
221		public String toString() {
222	<	return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
223	<	+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
224	<
222	>	return FormatName.getName(
223	>	_name,
224	>	getClass().getName(),
225	>	REVISION);
226		}
227
228		//---PRIVATE METHODS---
229
230	+	private String getInBound(String expected) throws IOException {
231	+	// grab the input
232	+	String inBound = getInBound();
233	+	// check if it's what we're expecting
234	+	if(!inBound.equals(expected)) {
235	+	throw new IOException("protocol error - expected:"+expected+" got:" + inBound);
236	+	}
237	+	// it should be ok then
238	+	return inBound;
239	+	}
240	+
241	+	private String getInBound() throws IOException {
242	+	// grab the input
243	+	String inBound = _socketIn.readLine();
244	+	// check for null's, likely disconnection
245	+	if(inBound == null) {
246	+	throw new IOException("got null from host, maybe it died");
247	+	}
248	+	// it's a valid message it seems
249	+	return inBound;
250	+	}
251	+
252		//---ACCESSOR/MUTATOR METHODS---
253
254		//---ATTRIBUTES---
255
256	<	Configurator _configurator;
257	<	Logger _logger;
258	<	Socket _socket;
259	<	BufferedReader _socketIn;
260	<	PrintWriter _socketOut;
256	>	/**
257	>	* This holds a reference to the
258	>	* system logger that is being used.
259	>	*/
260	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
261	>
262	>	/**
263	>	* A reference to the Configuration Manager the system is using
264	>	*/
265	>	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
266	>
267	>	/**
268	>	* This is the friendly identifier of the
269	>	* component this class is running in.
270	>	* eg, a Filter may be called "filter1",
271	>	* If this class does not have an owning
272	>	* component,  a name from the configuration
273	>	* can be placed here.  This name could also
274	>	* be changed to null for utility classes.
275	>	*/
276	>	private String _name = FilterManager.NAME;
277	>
278	>	/**
279	>	* The socket this class uses
280	>	*/
281	>	private Socket _socket;
282	>
283	>	/**
284	>	* Used for the input stream of this socket
285	>	*/
286	>	private BufferedReader _socketIn;
287	>
288	>	/**
289	>	* Used for the output stream of this socket
290	>	*/
291	>	private PrintWriter _socketOut;
292
293		//---STATIC ATTRIBUTES---
294

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