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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 1.11 by tdb, Thu Dec 7 00:02:17 2000 UTC vs.
Revision 1.31 by tdb, Mon May 20 11:38:14 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.filtermanager;
21	>	package uk.org.iscream.cms.server.filtermanager;
22
23		//---IMPORTS---
24	<	import uk.ac.ukc.iscream.core.*;
25	<	import uk.ac.ukc.iscream.filter.*;
26	<	import uk.ac.ukc.iscream.util.*;
27	<	import java.net.Socket;
24	>	import uk.org.iscream.cms.server.core.*;
25	>	import uk.org.iscream.cms.server.filter.*;
26	>	import uk.org.iscream.cms.server.util.*;
27	>	import uk.org.iscream.cms.server.componentmanager.*;
28	>	import java.net.*;
29		import java.io.*;
30	+	import java.util.*;
31
32		/**
33		* Handles setting up a host.
34	+	* This class provides a host with appropriate configuration
35	+	* and a reference to a Filter to which it should pass data.
36		*
37		* @author  $Author$
38		* @version $Id$
#	Line 27 | Line 50 | class HostInit extends Thread {
50
51		//---CONSTRUCTORS---
52
53	+	/**
54	+	* Construct a new HostInit.
55	+	*
56	+	* @param socket The socket to which the host is connected
57	+	*/
58		public HostInit(Socket socket) throws IOException {
59	+	// set the Thread name
60	+	setName("filtermanager.HostInit");
61	+
62		_socket = socket;
63	+	// setup reader & writer
64		_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
65	<	_socketOut = new PrintWriter(_socket.getOutputStream());
65	>	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
66		_logger.write(toString(), Logger.SYSINIT, "created");
67		}
68
69		//---PUBLIC METHODS---
70
71	+	/**
72	+	* Main method in this class, which handles communicating with
73	+	* the host to determine it's setup.
74	+	*/
75		public void run() {
76	+	// get a hook on the config proxy
77	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
78	+	// this is our config name
79	+	String configName = "Host." + _socket.getInetAddress().getHostName().toLowerCase();
80		try {
81	<	String inBound = _socketIn.readLine();
82	<	if (!inBound.equals("STARTCONFIG")) {
83	<	_socketOut.println("ERROR");
84	<	_socketOut.flush();
85	<	throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
86	<	}
87	<
88	<	Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase());
89	<	if (myConfig == null) {
90	<	_socketOut.println("ERROR");
91	<	throw new IOException("error in host configuration");
92	<	} else {
93	<	_socketOut.println("OK");
94	<	_socketOut.flush();
95	<
96	<	// get lastmodified
97	<	inBound = _socketIn.readLine();
98	<	if(!inBound.equals("LASTMODIFIED")) {
99	<	// protocol error
81	>	// try for STARTCONFIG
82	>	getInBound("STARTCONFIG");
83	>	_socketOut.println("OK");
84	>
85	>	// try for LASTMODIFIED
86	>	getInBound("LASTMODIFIED");
87	>	_socketOut.println(cp.getLastModified(configName));
88	>
89	>	// try for FILELIST
90	>	getInBound("FILELIST");
91	>	_socketOut.println(cp.getFileList(configName));
92	>
93	>	// try for FQDN
94	>	getInBound("FQDN");
95	>	_socketOut.println(_socket.getInetAddress().getHostName().toLowerCase());
96	>
97	>	// get properties
98	>	String reqProperty = getInBound();
99	>	while(!reqProperty.equals("ENDCONFIG")) {
100	>	// get the property
101	>	try {
102	>	String returnedProperty = cp.getProperty(configName, "Host."+reqProperty);
103	>	_socketOut.println(returnedProperty);
104	>	} catch (PropertyNotFoundException e) {
105		_socketOut.println("ERROR");
61	–	_socketOut.flush();
62	–	throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
106		}
107	<	else {
108	<	// send info
109	<	_socketOut.println(myConfig.getLastModified());
110	<	_socketOut.flush();
107	>	// get the next request
108	>	reqProperty = _socketIn.readLine();
109	>	}
110	>	_logger.write(toString(), Logger.SYSMSG, "configured host");
111	>	_socketOut.println("OK");
112	>
113	>	// get filter reference
114	>	getInBound("FILTER");
115	>	// send info
116	>	String filterList = cp.getProperty(configName, "Host.filter");
117	>	FilterInfo filterInfoRef = null;
118	>	String filter = null;
119	>	StringTokenizer st = new StringTokenizer(filterList, ";");
120	>	while (filterInfoRef==null && st.hasMoreTokens()) {
121	>	filter = st.nextToken();
122	>	_logger.write(toString(), Logger.DEBUG, " looking for filter- " + filter);
123	>	try {
124	>	filterInfoRef = FilterInfoHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.FilterInfo." + filter));
125	>	} catch (ComponentCORBAException e) {
126	>	_logger.write(toString(), Logger.DEBUG, " unable to find filter- " + filter);
127		}
69	–
70	–	// get config fileList
71	–	inBound = _socketIn.readLine();
72	–	if(!inBound.equals("FILELIST")) {
73	–	// protocol error
74	–	_socketOut.println("ERROR");
75	–	_socketOut.flush();
76	–	throw new IOException("protocol error - expected:FILELIST got:" + inBound);
77	–	}
78	–	else {
79	–	// send info
80	–	_socketOut.println(myConfig.getFileList());
81	–	_socketOut.flush();
82	–	}
83	–
84	–	// get properties
85	–	inBound = _socketIn.readLine();
86	–	while(!inBound.equals("ENDCONFIG")) {
87	–
88	–	// get the property
89	–	try {
90	–	String returnedProperty = myConfig.getProperty("Host."+inBound);
91	–
92	–	_socketOut.println(returnedProperty);
93	–	_socketOut.flush();
94	–
95	–	} catch (org.omg.CORBA.MARSHAL e) {
96	–	_socketOut.println("ERROR");
97	–	_socketOut.flush();
98	–	}
99	–	inBound = _socketIn.readLine();
100	–	}
101	–	_logger.write(toString(), Logger.SYSMSG, "configured host");
102	–	_socketOut.println("OK");
103	–	_socketOut.flush();
104	–
105	–	// get filter reference
106	–	inBound = _socketIn.readLine();
107	–	if(!inBound.equals("FILTER")) {
108	–	// protocol error
109	–	_socketOut.println("ERROR");
110	–	_socketOut.flush();
111	–	throw new IOException("protocol error - expected:FILTER got:" + inBound);
112	–	}
113	–	else {
114	–	// send info
115	–	String parentFilter =  myConfig.getProperty("Host.filter");
116	–	_logger.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
117	–	Filter filter = FilterHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.Filter." + parentFilter));
118	–	_socketOut.println(filter.getHostName() + ";"
119	–	+ filter.getUDPPort() + ";"
120	–	+ filter.getTCPPort());
121	–	_socketOut.flush();
122	–	}
123	–
124	–	// confirm that all is ok
125	–	inBound = _socketIn.readLine();
126	–	if(!inBound.equals("END")) {
127	–	// protocol error
128	–	_socketOut.println("ERROR");
129	–	_socketOut.flush();
130	–	throw new IOException("protocol error - expected:END got:" + inBound);
131	–	}
132	–	else {
133	–	// send ok
134	–	_socketOut.println("OK");
135	–	_socketOut.flush();
136	–	}
137	–
128		}
129	+
130	+	// hopefully we found a filter
131	+	if(filterInfoRef != null) {
132	+	_logger.write(toString(), Logger.DEBUG, " found filter- " + filter);
133	+	try {
134	+	// tell the host about it...
135	+	_socketOut.println(filterInfoRef.getHostName() + ";"
136	+	+ filterInfoRef.getUDPPort() + ";"
137	+	+ filterInfoRef.getTCPPort());
138	+	}
139	+	catch(org.omg.CORBA.COMM_FAILURE e) {
140	+	// failed to talk to filter, lets signal an error
141	+	_socketOut.println("ERROR");
142	+	throw new IOException("error communicating with filter - " + e);
143	+	}
144	+	}
145	+	else {
146	+	// ...or throw a wobbly (and tell the host!)
147	+	_socketOut.println("ERROR");
148	+	throw new IOException("unable to find filter for host");
149	+	}
150
151	+	// confirm ok with END
152	+	getInBound("END");
153	+	_socketOut.println("OK");
154	+
155		} catch (Exception e) {
156	<	_logger.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
156	>	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
157		}
158
144	–	_socketOut.flush();
159		// Disconnect streams & socket
160		try {
161		_socketIn.close();
#	Line 157 | Line 171 | class HostInit extends Thread {
171		* Overrides the {@link java.lang.Object#toString() Object.toString()}
172		* method to provide clean logging (every class should have this).
173		*
174	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
175	+	* to format the toString()
176	+	*
177		* @return the name of this class and its CVS revision
178		*/
179		public String toString() {
180	<	return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
181	<	+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
182	<
180	>	return FormatName.getName(
181	>	_name,
182	>	getClass().getName(),
183	>	REVISION);
184		}
185
186		//---PRIVATE METHODS---
187
188	+	private String getInBound(String expected) throws IOException {
189	+	// grab the input
190	+	String inBound = getInBound();
191	+	// check if it's what we're expecting
192	+	if(!inBound.equals(expected)) {
193	+	throw new IOException("protocol error - expected:"+expected+" got:" + inBound);
194	+	}
195	+	// it should be ok then
196	+	return inBound;
197	+	}
198	+
199	+	private String getInBound() throws IOException {
200	+	// grab the input
201	+	String inBound = _socketIn.readLine();
202	+	// check for null's, likely disconnection
203	+	if(inBound == null) {
204	+	throw new IOException("got null from host, maybe it died");
205	+	}
206	+	// it's a valid message it seems
207	+	return inBound;
208	+	}
209	+
210		//---ACCESSOR/MUTATOR METHODS---
211
212		//---ATTRIBUTES---
213
214		/**
215	<	* A reference to the logger the system is using
215	>	* This holds a reference to the
216	>	* system logger that is being used.
217		*/
218	<	Logger _logger = ReferenceManager.getInstance().getLogger();
218	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
219
220		/**
221		* A reference to the Configuration Manager the system is using
222		*/
223	<	ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
223	>	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
224
225	<	Socket _socket;
226	<	BufferedReader _socketIn;
227	<	PrintWriter _socketOut;
225	>	/**
226	>	* This is the friendly identifier of the
227	>	* component this class is running in.
228	>	* eg, a Filter may be called "filter1",
229	>	* If this class does not have an owning
230	>	* component,  a name from the configuration
231	>	* can be placed here.  This name could also
232	>	* be changed to null for utility classes.
233	>	*/
234	>	private String _name = FilterManager.NAME;
235	>
236	>	/**
237	>	* The socket this class uses
238	>	*/
239	>	private Socket _socket;
240	>
241	>	/**
242	>	* Used for the input stream of this socket
243	>	*/
244	>	private BufferedReader _socketIn;
245	>
246	>	/**
247	>	* Used for the output stream of this socket
248	>	*/
249	>	private PrintWriter _socketOut;
250
251		//---STATIC ATTRIBUTES---
252

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