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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 1.1 by tdb, Mon Nov 13 20:40:40 2000 UTC vs.
Revision 1.33 by tdb, Fri Sep 6 15:10:48 2002 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.server.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());
67	<	_logger.write(toString(), "created");
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");
82	>	// try for STARTCONFIG
83	>	getInBound("STARTCONFIG");
84	>	_socketOut.println("OK");
85	>
86	>	// try for LASTMODIFIED
87	>	getInBound("LASTMODIFIED");
88	>	_socketOut.println(cp.getLastModified(configName));
89	>
90	>	// try for FILELIST
91	>	getInBound("FILELIST");
92	>	_socketOut.println(cp.getFileList(configName));
93	>
94	>	// try for FQDN
95	>	getInBound("FQDN");
96	>	_socketOut.println(_socket.getInetAddress().getHostName().toLowerCase());
97	>
98	>	// get properties
99	>	String reqProperty = getInBound();
100	>	while(!reqProperty.equals("ENDCONFIG")) {
101	>	// get the property
102	>	try {
103	>	String returnedProperty = cp.getProperty(configName, "Host."+reqProperty);
104	>	_socketOut.println(returnedProperty);
105	>	} catch (PropertyNotFoundException e) {
106	>	_socketOut.println("ERROR");
107	>	}
108	>	// get the next request
109	>	reqProperty = _socketIn.readLine();
110		}
111	<
112	<	Configuration myConfig = _configurator.getConfiguration(_socket.getInetAddress().getHostName().toLowerCase());
113	<	if (myConfig == null) {
114	<	_socketOut.println("ERROR");
115	<	throw new IOException("No Configuration File For Host");
116	<	} else {
117	<	_socketOut.println("OK");
118	<	_socketOut.flush();
119	<
120	<	inBound = _socketIn.readLine();
121	<	while(!inBound.equals("ENDCONFIG")) {
122	<
123	<	// get the property
124	<	try {
125	<	String returnedProperty = myConfig.getProperty(inBound);
126	<
127	<	_socketOut.println(returnedProperty);
67	<	_socketOut.flush();
68	<
69	<	} catch (org.omg.CORBA.MARSHAL e) {
70	<	_socketOut.println("ERROR");
71	<	_socketOut.flush();
72	<	}
73	<	inBound = _socketIn.readLine();
111	>	_logger.write(toString(), Logger.SYSMSG, "configured host");
112	>	_socketOut.println("OK");
113	>
114	>	// get filter reference
115	>	getInBound("FILTER");
116	>	// send info
117	>	String filterList = cp.getProperty(configName, "Host.filter");
118	>	FilterInfo filterInfoRef = null;
119	>	String filter = null;
120	>	StringTokenizer st = new StringTokenizer(filterList, ";");
121	>	while (filterInfoRef==null && st.hasMoreTokens()) {
122	>	filter = st.nextToken();
123	>	_logger.write(toString(), Logger.DEBUG, " looking for filter- " + filter);
124	>	try {
125	>	filterInfoRef = FilterInfoHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.FilterInfo\\." + filter));
126	>	} catch (ComponentCORBAException e) {
127	>	_logger.write(toString(), Logger.DEBUG, " unable to find filter- " + filter);
128		}
75	–	_logger.write(toString(), "configured host");
76	–	_socketOut.println("OK");
77	–	_socketOut.flush();
129		}
130	+
131	+	// hopefully we found a filter
132	+	if(filterInfoRef != null) {
133	+	_logger.write(toString(), Logger.DEBUG, " found filter- " + filter);
134	+	try {
135	+	// tell the host about it...
136	+	_socketOut.println(filterInfoRef.getHostName() + ";"
137	+	+ filterInfoRef.getUDPPort() + ";"
138	+	+ filterInfoRef.getTCPPort());
139	+	}
140	+	catch(org.omg.CORBA.COMM_FAILURE e) {
141	+	// failed to talk to filter, lets signal an error
142	+	_socketOut.println("ERROR");
143	+	throw new IOException("error communicating with filter - " + e);
144	+	}
145	+	}
146	+	else {
147	+	// ...or throw a wobbly (and tell the host!)
148	+	_socketOut.println("ERROR");
149	+	throw new IOException("unable to find filter for host");
150	+	}
151
152	+	// confirm ok with END
153	+	getInBound("END");
154	+	_socketOut.println("OK");
155	+
156		} catch (Exception e) {
157	<	_logger.write(toString(), e.toString());
157	>	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
158		}
159
84	–	_socketOut.flush();
160		// Disconnect streams & socket
161		try {
162		_socketIn.close();
163		_socketOut.close();
164		_socket.close();
165		} catch (IOException e) {
166	<	_logger.write(toString(), "exception on socket close");
166	>	_logger.write(toString(), Logger.ERROR, "exception on socket close");
167		}
168	<	_logger.write(toString(), "finished");
168	>	_logger.write(toString(), Logger.SYSMSG, "finished");
169		}
170
171		/**
172		* Overrides the {@link java.lang.Object#toString() Object.toString()}
173		* method to provide clean logging (every class should have this).
174		*
175	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
176	+	* to format the toString()
177	+	*
178		* @return the name of this class and its CVS revision
179		*/
180		public String toString() {
181	<	return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
182	<	+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
183	<
181	>	return FormatName.getName(
182	>	_name,
183	>	getClass().getName(),
184	>	REVISION);
185		}
186
187		//---PRIVATE METHODS---
188
189	+	private String getInBound(String expected) throws IOException {
190	+	// grab the input
191	+	String inBound = getInBound();
192	+	// check if it's what we're expecting
193	+	if(!inBound.equals(expected)) {
194	+	throw new IOException("protocol error - expected:"+expected+" got:" + inBound);
195	+	}
196	+	// it should be ok then
197	+	return inBound;
198	+	}
199	+
200	+	private String getInBound() throws IOException {
201	+	// grab the input
202	+	String inBound = _socketIn.readLine();
203	+	// check for null's, likely disconnection
204	+	if(inBound == null) {
205	+	throw new IOException("got null from host, maybe it died");
206	+	}
207	+	// it's a valid message it seems
208	+	return inBound;
209	+	}
210	+
211		//---ACCESSOR/MUTATOR METHODS---
212
213		//---ATTRIBUTES---
214
215	<	Configurator _configurator;
216	<	Logger _logger;
217	<	Socket _socket;
218	<	BufferedReader _socketIn;
219	<	PrintWriter _socketOut;
215	>	/**
216	>	* This holds a reference to the
217	>	* system logger that is being used.
218	>	*/
219	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
220	>
221	>	/**
222	>	* A reference to the Configuration Manager the system is using
223	>	*/
224	>	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
225	>
226	>	/**
227	>	* This is the friendly identifier of the
228	>	* component this class is running in.
229	>	* eg, a Filter may be called "filter1",
230	>	* If this class does not have an owning
231	>	* component,  a name from the configuration
232	>	* can be placed here.  This name could also
233	>	* be changed to null for utility classes.
234	>	*/
235	>	private String _name = FilterManager.NAME;
236	>
237	>	/**
238	>	* The socket this class uses
239	>	*/
240	>	private Socket _socket;
241	>
242	>	/**
243	>	* Used for the input stream of this socket
244	>	*/
245	>	private BufferedReader _socketIn;
246	>
247	>	/**
248	>	* Used for the output stream of this socket
249	>	*/
250	>	private PrintWriter _socketOut;
251
252		//---STATIC ATTRIBUTES---
253

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