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

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filter/FilterMain.java (file contents):
Revision 1.18 by tdb, Fri Jan 12 00:45:25 2001 UTC vs.
Revision 1.35 by tdb, Sat May 18 18:16:01 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.util.*;
25	<	import uk.ac.ukc.iscream.core.*;
26	<	import uk.ac.ukc.iscream.filter.*;
24	>	import uk.org.iscream.cms.server.util.*;
25	>	import uk.org.iscream.cms.server.core.*;
26	>	import uk.org.iscream.cms.server.componentmanager.*;
27	>	import uk.org.iscream.cms.server.filter.*;
28
29		/**
30		* A Filter Startup Class
#	Line 13 | Line 33 | import uk.ac.ukc.iscream.filter.*;
33		* @author  $Author$
34		* @version $Id$
35		*/
36	<	public class FilterMain implements uk.ac.ukc.iscream.util.Component {
36	>	public class FilterMain implements Component {
37
38		//---FINAL ATTRIBUTES---
39
#	Line 41 | Line 61 | public class FilterMain implements uk.ac.ukc.iscream.u
61		* Starts the Filter component
62		*/
63		public void start() throws ComponentStartException {
64	<
64	>	// get references to key objects
65	>	_logger = _refman.getLogger();
66	>
67		_logger.write(toString(), Logger.SYSINIT, "coming up");
68	+
69	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
70	+
71	+	// which input methods do we need to activate?
72	+	// default to activating them
73	+	boolean activateTCPReader = true;
74	+	boolean activateUDPReader = true;
75	+	boolean activateCORBAReader = true;
76	+
77	+	// check for TCP Reader
78	+	try {
79	+	int tcp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateTCPReader"));
80	+	activateTCPReader = (tcp == 1);
81	+	} catch (PropertyNotFoundException e) {
82	+	activateTCPReader = false;
83	+	} catch (NumberFormatException e) {
84	+	activateTCPReader = false;
85	+	}
86	+	// check for UDP Reader
87	+	try {
88	+	int udp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateUDPReader"));
89	+	activateUDPReader = (udp == 1);
90	+	} catch (PropertyNotFoundException e) {
91	+	activateUDPReader = false;
92	+	} catch (NumberFormatException e) {
93	+	activateUDPReader = false;
94	+	}
95	+	// check for CORBA Reader
96	+	try {
97	+	int corba = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateCORBAReader"));
98	+	activateCORBAReader = (corba == 1);
99	+	} catch (PropertyNotFoundException e) {
100	+	activateCORBAReader = false;
101	+	} catch (NumberFormatException e) {
102	+	activateCORBAReader = false;
103	+	}
104	+
105	+	// need to use the Queue later on
106	+	Queue queue;
107	+
108	+	// there's little point starting a Queue and a FilterThread
109	+	// if nothing is going to be giving us any data
110	+	if(activateTCPReader || activateUDPReader || activateCORBAReader) {
111	+	// see if this Queue needs a size limit
112	+	try {
113	+	int queueSizeLimit = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.SizeLimit"));
114	+	String queueRemoveAlgorithm = cp.getProperty("Filter." + FilterMain.NAME, "Queue.RemoveAlgorithm");
115	+	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
116	+	if(algorithm != -1) {
117	+	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
118	+	// we have valid values, so lets start it.
119	+	queue = new Queue(queueSizeLimit, algorithm);
120	+	}
121	+	else {
122	+	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
123	+	// just don't activate a limit
124	+	queue = new Queue();
125	+	}
126	+
127	+	} catch (PropertyNotFoundException e) {
128	+	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
129	+	// just don't activate a limit
130	+	queue = new Queue();
131	+	} catch (NumberFormatException e) {
132	+	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
133	+	// just don't activate a limit
134	+	queue = new Queue();
135	+	}
136
137	<	// configuration variables we require
48	<	int UDPListenPort = 0;
49	<	int TCPListenPort = 0;
50	<	String parentFilterName = null;
51	<
52	<	Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME);
53	<	if (config == null) {
54	<	System.err.println("CRITICAL:Unable to obtain configuration" +
55	<	"\n         Advise you check the i-scream log for more information.");
56	<	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
57	<	System.exit(1);
58	<	} else {
137	>	// startup a monitor on this queue
138		try {
139	<	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
140	<	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
141	<	parentFilterName = config.getProperty("Filter.parentFilter");
142	<	} catch (org.omg.CORBA.MARSHAL e) {
143	<	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
144	<	"\n         Advise you check the i-scream log for more information.");
66	<	_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
67	<	System.exit(1);
139	>	// try to get the interval, if this fails, we won't start up the monitor
140	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.MonitorInterval"));
141	>	String queueName = NAME + " Filter";
142	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
143	>	} catch (PropertyNotFoundException e) {
144	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
145		}
146	+
147	+	// Start a filter thread
148	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
149	+	FilterThread filterThread = new FilterThread(queue);
150	+	filterThread.start();
151		}
152	<	_logger.write(toString(), Logger.SYSINIT, "configured");
152	>	else {
153	>	// it's pointless carrying on really...
154	>	throw new ComponentStartException("Can't start Filter without any inbound data feeds");
155	>	}
156
157	<	// get parent
158	<	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
157	>	// the corba listener needs these to be set, so lets
158	>	// make them something obviously invalid initially
159	>	int TCPListenPort = -1;
160	>	int UDPListenPort = -1;
161
162	<	// setup a queue
163	<	Queue queue = new Queue();
162	>	// TCP Reader start (for heartbeats)
163	>	if(activateTCPReader) {
164	>	try {
165	>	// get the port number from the configuration
166	>	TCPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.TCPListenPort"));
167	>	// start the TCPReader
168	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
169	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
170	>	tcpReader.start();
171	>	} catch (PropertyNotFoundException e) {
172	>	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to missing configuration: " + e);
173	>	} catch (NumberFormatException e) {
174	>	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to invalid configuration: " + e);
175	>	}
176	>	}
177
178	<	// Start a filter thread
179	<	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
180	<	FilterThread filterThread = new FilterThread(queue, parentFilter);
181	<	filterThread.start();
178	>	// UDP Reader start (for inbound host data)
179	>	if(activateUDPReader) {
180	>	try {
181	>	// get the port number from the configuration
182	>	UDPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.UDPListenPort"));
183	>	// start the UDPReader
184	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
185	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
186	>	udpReader.start();
187	>	} catch (PropertyNotFoundException e) {
188	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to missing configuration: " + e);
189	>	} catch (NumberFormatException e) {
190	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to invalid configuration: " + e);
191	>	}
192	>	}
193
194		// FilterServant start (for inbound child filter data)
195	<	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
196	<	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
197	<	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
198	<
199	<	// UDL Reader start (for inbound host data)
200	<	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
90	<	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
91	<	udpReader.start();
92	<
93	<	// TCP Reader start (for heartbeats)
94	<	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
95	<	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
96	<	tcpReader.start();
195	>	if(activateCORBAReader) {
196	>	// start the FilterServant
197	>	_logger.write(toString(), Logger.SYSINIT, "starting Servant to listen for downstream filters");
198	>	FilterServant filterServant = new FilterServant(queue);
199	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
200	>	}
201
202	+	// FilterInfoServant start (to provide filter information to the server)
203	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to provide filter information");
204	+	FilterInfoServant filterInfoServant = new FilterInfoServant(TCPListenPort, UDPListenPort);
205	+	_refman.bindToOrb(filterInfoServant, "iscream.FilterInfo." + FilterMain.NAME);
206	+
207		_logger.write(toString(), Logger.SYSINIT, "started");
208		}
209	<
209	>
210		/**
211	+	* Does a dependency check. Used mainly at startup to
212	+	* see if the required dependencies (components) are up
213	+	* and running.
214	+	*
215	+	* @return a boolean value, true if the depdencies are satisfied
216	+	*/
217	+	public boolean depCheck() {
218	+	try {
219	+	org.omg.CORBA.Object obj;
220	+	// first check the ConfigurationManager is alive
221	+	obj = _refman.getCORBARef("iscream.ConfigurationManager");
222	+	// then suss out our parent filter
223	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
224	+	String parentFilterName = cp.getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
225	+	// finally check the parent filter is alive
226	+	obj = _refman.getCORBARef("iscream.Filter." + parentFilterName);
227	+	} catch(ComponentCORBAException e) {
228	+	System.err.println(toString() + ": Dependency Failure: "+e);
229	+	return false;
230	+	} catch(PropertyNotFoundException e) {
231	+	System.err.println(toString() + ": Unable to obtain configuration: "+e);
232	+	return false;
233	+	}
234	+	// dependency check suceeded
235	+	return true;
236	+	}
237	+
238	+	/**
239		* Overrides the {@link java.lang.Object#toString() Object.toString()}
240		* method to provide clean logging (every class should have this).
241		*
242	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
242	>	* This uses the uk.org.iscream.cms.server.util.NameFormat class
243		* to format the toString()
244		*
245		* @return the name of this class and its CVS revision
#	Line 124 | Line 261 | public class FilterMain implements uk.ac.ukc.iscream.u
261		* This holds a reference to the
262		* system logger that is being used.
263		*/
264	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
264	>	private Logger _logger;
265
266		/**
267		* A reference to the reference manager in use
#	Line 140 | Line 277 | public class FilterMain implements uk.ac.ukc.iscream.u
277		*/
278		public static String NAME;
279
280	<	}
280	>	}

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