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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 1.36 by tdb, Tue May 21 16:47:17 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.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.server.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 activateTCPReader = true;
75	+	boolean activateUDPReader = true;
76	+	boolean activateCORBAReader = true;
77	+
78	+	// check for TCP Reader
79	+	try {
80	+	int tcp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateTCPReader"));
81	+	activateTCPReader = (tcp == 1);
82	+	} catch (PropertyNotFoundException e) {
83	+	activateTCPReader = false;
84	+	} catch (NumberFormatException e) {
85	+	activateTCPReader = false;
86	+	}
87	+	// check for UDP Reader
88	+	try {
89	+	int udp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateUDPReader"));
90	+	activateUDPReader = (udp == 1);
91	+	} catch (PropertyNotFoundException e) {
92	+	activateUDPReader = false;
93	+	} catch (NumberFormatException e) {
94	+	activateUDPReader = false;
95	+	}
96	+	// check for CORBA Reader
97	+	try {
98	+	int corba = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateCORBAReader"));
99	+	activateCORBAReader = (corba == 1);
100	+	} catch (PropertyNotFoundException e) {
101	+	activateCORBAReader = false;
102	+	} catch (NumberFormatException e) {
103	+	activateCORBAReader = false;
104	+	}
105	+
106	+	// need to use the Queue later on
107	+	Queue queue;
108	+
109	+	// there's little point starting a Queue and a FilterThread
110	+	// if nothing is going to be giving us any data
111	+	if(activateTCPReader || activateUDPReader || activateCORBAReader) {
112	+	// see if this Queue needs a size limit
113	+	try {
114	+	int queueSizeLimit = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.SizeLimit"));
115	+	String queueRemoveAlgorithm = cp.getProperty("Filter." + FilterMain.NAME, "Queue.RemoveAlgorithm");
116	+	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
117	+	if(algorithm != -1) {
118	+	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
119	+	// we have valid values, so lets start it.
120	+	queue = new Queue(queueSizeLimit, algorithm);
121	+	}
122	+	else {
123	+	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
124	+	// just don't activate a limit
125	+	queue = new Queue();
126	+	}
127	+
128	+	} catch (PropertyNotFoundException e) {
129	+	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
130	+	// just don't activate a limit
131	+	queue = new Queue();
132	+	} catch (NumberFormatException e) {
133	+	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
134	+	// just don't activate a limit
135	+	queue = new Queue();
136	+	}
137
138	<	// 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 {
138	>	// startup a monitor on this queue
139		try {
140	<	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
141	<	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
142	<	parentFilterName = config.getProperty("Filter.parentFilter");
143	<	} catch (org.omg.CORBA.MARSHAL e) {
144	<	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
145	<	"\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);
140	>	// try to get the interval, if this fails, we won't start up the monitor
141	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.MonitorInterval"));
142	>	String queueName = NAME + " Filter";
143	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
144	>	} catch (PropertyNotFoundException e) {
145	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
146		}
147	+
148	+	// Start a filter thread
149	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
150	+	FilterThread filterThread = new FilterThread(queue);
151	+	filterThread.start();
152		}
153	<	_logger.write(toString(), Logger.SYSINIT, "configured");
153	>	else {
154	>	// it's pointless carrying on really...
155	>	throw new ComponentStartException("Can't start Filter without any inbound data feeds");
156	>	}
157
158	<	// get parent
159	<	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
158	>	// the corba listener needs these to be set, so lets
159	>	// make them something obviously invalid initially
160	>	int TCPListenPort = -1;
161	>	int UDPListenPort = -1;
162
163	<	// setup a queue
164	<	Queue queue = new Queue();
163	>	// TCP Reader start (for heartbeats)
164	>	if(activateTCPReader) {
165	>	try {
166	>	// get the port number from the configuration
167	>	TCPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.TCPListenPort"));
168	>	// start the TCPReader
169	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
170	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
171	>	tcpReader.start();
172	>	} catch (PropertyNotFoundException e) {
173	>	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to missing configuration: " + e);
174	>	} catch (NumberFormatException e) {
175	>	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to invalid configuration: " + e);
176	>	}
177	>	}
178
179	<	// Start a filter thread
180	<	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
181	<	FilterThread filterThread = new FilterThread(queue, parentFilter);
182	<	filterThread.start();
179	>	// UDP Reader start (for inbound host data)
180	>	if(activateUDPReader) {
181	>	try {
182	>	// get the port number from the configuration
183	>	UDPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.UDPListenPort"));
184	>	// start the UDPReader
185	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
186	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
187	>	udpReader.start();
188	>	} catch (PropertyNotFoundException e) {
189	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to missing configuration: " + e);
190	>	} catch (NumberFormatException e) {
191	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to invalid configuration: " + e);
192	>	}
193	>	}
194
195		// FilterServant start (for inbound child filter data)
196	<	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
197	<	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
198	<	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
199	<
200	<	// UDL Reader start (for inbound host data)
201	<	_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();
196	>	if(activateCORBAReader) {
197	>	// start the FilterServant
198	>	_logger.write(toString(), Logger.SYSINIT, "starting Servant to listen for downstream filters");
199	>	FilterServant filterServant = new FilterServant(queue);
200	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
201	>	}
202
203	+	// FilterInfoServant start (to provide filter information to the server)
204	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to provide filter information");
205	+	FilterInfoServant filterInfoServant = new FilterInfoServant(TCPListenPort, UDPListenPort);
206	+	_refman.bindToOrb(filterInfoServant, "iscream.FilterInfo." + FilterMain.NAME);
207	+
208		_logger.write(toString(), Logger.SYSINIT, "started");
209		}
210	<
210	>
211		/**
212	+	* Does a dependency check. Used mainly at startup to
213	+	* see if the required dependencies (components) are up
214	+	* and running.
215	+	*
216	+	* @return a boolean value, true if the depdencies are satisfied
217	+	*/
218	+	public boolean depCheck() {
219	+	try {
220	+	org.omg.CORBA.Object obj;
221	+	// first check the ConfigurationManager is alive
222	+	obj = _refman.getCORBARef("iscream.ConfigurationManager");
223	+	// then suss out our parent filter
224	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
225	+	String parentFilterName = cp.getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
226	+	// finally check the parent filter is alive
227	+	obj = _refman.getCORBARef("iscream.Filter." + parentFilterName);
228	+	} catch(ComponentCORBAException e) {
229	+	System.err.println(toString() + ": Dependency Failure: "+e);
230	+	return false;
231	+	} catch(PropertyNotFoundException e) {
232	+	System.err.println(toString() + ": Unable to obtain configuration: "+e);
233	+	return false;
234	+	}
235	+	// dependency check suceeded
236	+	return true;
237	+	}
238	+
239	+	/**
240		* Overrides the {@link java.lang.Object#toString() Object.toString()}
241		* method to provide clean logging (every class should have this).
242		*
243	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
243	>	* This uses the uk.org.iscream.cms.server.util.NameFormat class
244		* to format the toString()
245		*
246		* @return the name of this class and its CVS revision
#	Line 124 | Line 262 | public class FilterMain implements uk.ac.ukc.iscream.u
262		* This holds a reference to the
263		* system logger that is being used.
264		*/
265	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
265	>	private Logger _logger;
266
267		/**
268		* A reference to the reference manager in use
#	Line 140 | Line 278 | public class FilterMain implements uk.ac.ukc.iscream.u
278		*/
279		public static String NAME;
280
281	<	}
281	>	}

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