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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 1.7 by tdb, Thu Nov 23 01:46:17 2000 UTC vs.
Revision 1.30 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.org.iscream.cms.server.filtermanager;
22
23		//---IMPORTS---
24	<	import uk.ac.ukc.iscream.core.*;
25	<	import uk.ac.ukc.iscream.filter.*;
26	<	import java.net.Socket;
27	<	import java.io.InputStream;
28	<	import java.io.OutputStream;
9	<	import java.io.IOException;
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 org.omg.CORBA.*;
12	<	import org.omg.CosNaming.*;
30	>	import java.util.*;
31
32		/**
33	<	* <ONE LINE DESCRIPTION>
34	<	* <DETAILED DESCRIPTION>
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 31 | Line 50 | class HostInit extends Thread {
50
51		//---CONSTRUCTORS---
52
53	<	public HostInit(Socket socket, ConfigurationManager configManager, Logger logRef, NamingContextExt ncRef) throws IOException {
54	<	_configManager = configManager;
55	<	_logRef = logRef;
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	<	_ncRef = ncRef;
63	>	// setup reader & writer
64		_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
65	<	_socketOut = new PrintWriter(_socket.getOutputStream());
66	<	_logRef.write(toString(), Logger.SYSINIT, "created");
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(_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");
68	–	_socketOut.flush();
69	–	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		}
76	–
77	–	// get config fileList
78	–	inBound = _socketIn.readLine();
79	–	if(!inBound.equals("FILELIST")) {
80	–	// protocol error
81	–	_socketOut.println("ERROR");
82	–	_socketOut.flush();
83	–	throw new IOException("protocol error - expected:FILELIST got:" + inBound);
84	–	}
85	–	else {
86	–	// send info
87	–	_socketOut.println(myConfig.getFileList());
88	–	_socketOut.flush();
89	–	}
90	–
91	–	// get properties
92	–	inBound = _socketIn.readLine();
93	–	while(!inBound.equals("ENDCONFIG")) {
94	–
95	–	// get the property
96	–	try {
97	–	String returnedProperty = myConfig.getProperty(inBound);
98	–
99	–	_socketOut.println(returnedProperty);
100	–	_socketOut.flush();
101	–
102	–	} catch (org.omg.CORBA.MARSHAL e) {
103	–	_socketOut.println("ERROR");
104	–	_socketOut.flush();
105	–	}
106	–	inBound = _socketIn.readLine();
107	–	}
108	–	_logRef.write(toString(), Logger.SYSMSG, "configured host");
109	–	_socketOut.println("OK");
110	–	_socketOut.flush();
111	–
112	–	// get filter reference
113	–	inBound = _socketIn.readLine();
114	–	if(!inBound.equals("FILTER")) {
115	–	// protocol error
116	–	_socketOut.println("ERROR");
117	–	_socketOut.flush();
118	–	throw new IOException("protocol error - expected:FILTER got:" + inBound);
119	–	}
120	–	else {
121	–	// send info
122	–	String parentFilter =  myConfig.getProperty("Host.filter");
123	–	_logRef.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
124	–	org.omg.CORBA.Object objRef = _ncRef.resolve(_ncRef.to_name("iscream.Filter." + parentFilter));
125	–	Filter filter = FilterHelper.narrow(objRef);
126	–	_socketOut.println(filter.getHostName() + ";"
127	–	+ filter.getUDPPort() + ";"
128	–	+ filter.getTCPPort());
129	–	_socketOut.flush();
130	–	}
131	–
132	–	// confirm that all is ok
133	–	inBound = _socketIn.readLine();
134	–	if(!inBound.equals("END")) {
135	–	// protocol error
136	–	_socketOut.println("ERROR");
137	–	_socketOut.flush();
138	–	throw new IOException("protocol error - expected:END got:" + inBound);
139	–	}
140	–	else {
141	–	// send ok
142	–	_socketOut.println("OK");
143	–	_socketOut.flush();
144	–	}
145	–
128		}
129	+
130	+	// hopefully we found a filter
131	+	if(filterInfoRef != null) {
132	+	_logger.write(toString(), Logger.DEBUG, " found filter- " + filter);
133	+	// tell the host about it...
134	+	_socketOut.println(filterInfoRef.getHostName() + ";"
135	+	+ filterInfoRef.getUDPPort() + ";"
136	+	+ filterInfoRef.getTCPPort());
137	+	}
138	+	else {
139	+	// ...or throw a wobbly (and tell the host!)
140	+	_socketOut.println("ERROR");
141	+	throw new IOException("unable to find filter for host");
142	+	}
143
144	+	// confirm ok with END
145	+	getInBound("END");
146	+	_socketOut.println("OK");
147	+
148		} catch (Exception e) {
149	<	_logRef.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
149	>	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
150		}
151
152	–	_socketOut.flush();
152		// Disconnect streams & socket
153		try {
154		_socketIn.close();
155		_socketOut.close();
156		_socket.close();
157		} catch (IOException e) {
158	<	_logRef.write(toString(), Logger.ERROR, "exception on socket close");
158	>	_logger.write(toString(), Logger.ERROR, "exception on socket close");
159		}
160	<	_logRef.write(toString(), Logger.SYSMSG, "finished");
160	>	_logger.write(toString(), Logger.SYSMSG, "finished");
161		}
162
163		/**
164		* Overrides the {@link java.lang.Object#toString() Object.toString()}
165		* method to provide clean logging (every class should have this).
166		*
167	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
168	+	* to format the toString()
169	+	*
170		* @return the name of this class and its CVS revision
171		*/
172		public String toString() {
173	<	return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
174	<	+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
175	<
173	>	return FormatName.getName(
174	>	_name,
175	>	getClass().getName(),
176	>	REVISION);
177		}
178
179		//---PRIVATE METHODS---
180
181	+	private String getInBound(String expected) throws IOException {
182	+	// grab the input
183	+	String inBound = getInBound();
184	+	// check if it's what we're expecting
185	+	if(!inBound.equals(expected)) {
186	+	throw new IOException("protocol error - expected:"+expected+" got:" + inBound);
187	+	}
188	+	// it should be ok then
189	+	return inBound;
190	+	}
191	+
192	+	private String getInBound() throws IOException {
193	+	// grab the input
194	+	String inBound = _socketIn.readLine();
195	+	// check for null's, likely disconnection
196	+	if(inBound == null) {
197	+	throw new IOException("got null from host, maybe it died");
198	+	}
199	+	// it's a valid message it seems
200	+	return inBound;
201	+	}
202	+
203		//---ACCESSOR/MUTATOR METHODS---
204
205		//---ATTRIBUTES---
206
207	<	ConfigurationManager _configManager;
208	<	Logger _logRef;
209	<	Socket _socket;
210	<	BufferedReader _socketIn;
211	<	PrintWriter _socketOut;
212	<	NamingContextExt _ncRef;
207	>	/**
208	>	* This holds a reference to the
209	>	* system logger that is being used.
210	>	*/
211	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
212	>
213	>	/**
214	>	* A reference to the Configuration Manager the system is using
215	>	*/
216	>	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
217	>
218	>	/**
219	>	* This is the friendly identifier of the
220	>	* component this class is running in.
221	>	* eg, a Filter may be called "filter1",
222	>	* If this class does not have an owning
223	>	* component,  a name from the configuration
224	>	* can be placed here.  This name could also
225	>	* be changed to null for utility classes.
226	>	*/
227	>	private String _name = FilterManager.NAME;
228	>
229	>	/**
230	>	* The socket this class uses
231	>	*/
232	>	private Socket _socket;
233	>
234	>	/**
235	>	* Used for the input stream of this socket
236	>	*/
237	>	private BufferedReader _socketIn;
238	>
239	>	/**
240	>	* Used for the output stream of this socket
241	>	*/
242	>	private PrintWriter _socketOut;
243	>
244		//---STATIC ATTRIBUTES---
245
246		}

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