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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 1.39 by tdb, Mon Feb 24 20:18:49 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.ac.ukc.iscream.filter;
22	>	package uk.org.iscream.cms.server.filter;
23
24		//---IMPORTS---
25	<	import uk.ac.ukc.iscream.util.*;
26	<	import uk.ac.ukc.iscream.core.*;
27	<	import uk.ac.ukc.iscream.filter.*;
25	>	import uk.org.iscream.cms.util.*;
26	>	import uk.org.iscream.cms.server.core.*;
27	>	import uk.org.iscream.cms.server.componentmanager.*;
28	>	import uk.org.iscream.cms.server.filter.*;
29
30		/**
31		* A Filter Startup Class
#	Line 13 | Line 34 | import uk.ac.ukc.iscream.filter.*;
34		* @author  $Author$
35		* @version $Id$
36		*/
37	<	public class FilterMain implements uk.ac.ukc.iscream.util.Component {
37	>	public class FilterMain implements Component {
38
39		//---FINAL ATTRIBUTES---
40
#	Line 41 | Line 62 | public class FilterMain implements uk.ac.ukc.iscream.u
62		* Starts the Filter component
63		*/
64		public void start() throws ComponentStartException {
65	<
65	>	// get references to key objects
66	>	_logger = _refman.getLogger();
67	>
68		_logger.write(toString(), Logger.SYSINIT, "coming up");
69	+
70	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
71	+
72	+	// which input methods do we need to activate?
73	+	// default to activating them
74	+	boolean activateUDPReader = true;
75	+	boolean activateCORBAReader = true;
76	+
77	+	// check for UDP Reader
78	+	try {
79	+	int udp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateUDPReader"));
80	+	activateUDPReader = (udp == 1);
81	+	} catch (PropertyNotFoundException e) {
82	+	activateUDPReader = false;
83	+	} catch (NumberFormatException e) {
84	+	activateUDPReader = false;
85	+	}
86	+	// check for CORBA Reader
87	+	try {
88	+	int corba = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateCORBAReader"));
89	+	activateCORBAReader = (corba == 1);
90	+	} catch (PropertyNotFoundException e) {
91	+	activateCORBAReader = false;
92	+	} catch (NumberFormatException e) {
93	+	activateCORBAReader = false;
94	+	}
95	+
96	+	// need to use the Queue later on
97	+	Queue queue;
98	+
99	+	// there's little point starting a Queue and a FilterThread
100	+	// if nothing is going to be giving us any data
101	+	if(activateUDPReader || activateCORBAReader) {
102	+	// see if this Queue needs a size limit
103	+	try {
104	+	int queueSizeLimit = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.SizeLimit"));
105	+	String queueRemoveAlgorithm = cp.getProperty("Filter." + FilterMain.NAME, "Queue.RemoveAlgorithm");
106	+	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
107	+	if(algorithm != -1) {
108	+	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
109	+	// we have valid values, so lets start it.
110	+	queue = new Queue(queueSizeLimit, algorithm);
111	+	}
112	+	else {
113	+	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
114	+	// just don't activate a limit
115	+	queue = new Queue();
116	+	}
117	+
118	+	} catch (PropertyNotFoundException e) {
119	+	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
120	+	// just don't activate a limit
121	+	queue = new Queue();
122	+	} catch (NumberFormatException e) {
123	+	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
124	+	// just don't activate a limit
125	+	queue = new Queue();
126	+	}
127
128	<	// 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 {
128	>	// startup a monitor on this queue
129		try {
130	<	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
131	<	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
132	<	parentFilterName = config.getProperty("Filter.parentFilter");
133	<	} catch (org.omg.CORBA.MARSHAL e) {
134	<	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
135	<	"\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);
130	>	// try to get the interval, if this fails, we won't start up the monitor
131	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.MonitorInterval"));
132	>	String queueName = NAME + " Filter";
133	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
134	>	} catch (PropertyNotFoundException e) {
135	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
136		}
137	+
138	+	// Start a filter thread
139	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
140	+	FilterThread filterThread = new FilterThread(queue);
141	+	filterThread.start();
142		}
143	<	_logger.write(toString(), Logger.SYSINIT, "configured");
143	>	else {
144	>	// it's pointless carrying on really...
145	>	throw new ComponentStartException("Can't start Filter without any inbound data feeds");
146	>	}
147
148	<	// get parent
149	<	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
148	>	// the corba listener needs these to be set, so lets
149	>	// make them something obviously invalid initially
150	>	int UDPListenPort = -1;
151
152	<	// setup a queue
153	<	Queue queue = new Queue();
152	>	// UDP Reader start (for inbound host data)
153	>	if(activateUDPReader) {
154	>	try {
155	>	// get the port number from the configuration
156	>	UDPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.UDPListenPort"));
157	>	// start the UDPReader
158	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
159	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
160	>	udpReader.start();
161	>	} catch (PropertyNotFoundException e) {
162	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to missing configuration: " + e);
163	>	} catch (NumberFormatException e) {
164	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to invalid configuration: " + e);
165	>	}
166	>	}
167
78	–	// Start a filter thread
79	–	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
80	–	FilterThread filterThread = new FilterThread(queue, parentFilter);
81	–	filterThread.start();
82	–
168		// FilterServant start (for inbound child filter data)
169	<	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
170	<	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
171	<	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
172	<
173	<	// UDL Reader start (for inbound host data)
174	<	_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();
169	>	if(activateCORBAReader) {
170	>	// start the FilterServant
171	>	_logger.write(toString(), Logger.SYSINIT, "starting Servant to listen for downstream filters");
172	>	FilterServant filterServant = new FilterServant(queue);
173	>	_refman.bindToOrb(filterServant, "iscream.Filter\\." + FilterMain.NAME);
174	>	}
175
176	+	// FilterInfoServant start (to provide filter information to the server)
177	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to provide filter information");
178	+	FilterInfoServant filterInfoServant = new FilterInfoServant(UDPListenPort);
179	+	_refman.bindToOrb(filterInfoServant, "iscream.FilterInfo\\." + FilterMain.NAME);
180	+
181		_logger.write(toString(), Logger.SYSINIT, "started");
182		}
183	<
183	>
184		/**
185	+	* Does a dependency check. Used mainly at startup to
186	+	* see if the required dependencies (components) are up
187	+	* and running.
188	+	*
189	+	* @return a boolean value, true if the depdencies are satisfied
190	+	*/
191	+	public boolean depCheck() {
192	+	try {
193	+	org.omg.CORBA.Object obj;
194	+	// first check the ConfigurationManager is alive
195	+	obj = _refman.getCORBARef("iscream.ConfigurationManager");
196	+	// then suss out our parent filter
197	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
198	+	String parentFilterName = cp.getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
199	+	// finally check the parent filter is alive
200	+	obj = _refman.getCORBARef("iscream.Filter\\." + parentFilterName);
201	+	} catch(ComponentCORBAException e) {
202	+	System.err.println(toString() + ": Dependency Failure: "+e);
203	+	return false;
204	+	} catch(PropertyNotFoundException e) {
205	+	System.err.println(toString() + ": Unable to obtain configuration: "+e);
206	+	return false;
207	+	}
208	+	// dependency check suceeded
209	+	return true;
210	+	}
211	+
212	+	/**
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.ac.ukc.iscream.util.NameFormat class
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
#	Line 124 | Line 235 | public class FilterMain implements uk.ac.ukc.iscream.u
235		* This holds a reference to the
236		* system logger that is being used.
237		*/
238	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
238	>	private Logger _logger;
239
240		/**
241		* A reference to the reference manager in use
#	Line 140 | Line 251 | public class FilterMain implements uk.ac.ukc.iscream.u
251		*/
252		public static String NAME;
253
254	<	}
254	>	}

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