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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 1.13 by ajm, Thu Nov 30 02:18:51 2000 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.refman.*;
26	<	import uk.ac.ukc.iscream.core.*;
27	<	import uk.ac.ukc.iscream.filter.*;
28	<	import org.omg.CORBA.*;
9	<	import org.omg.CosNaming.*;
10	<	import org.omg.PortableServer.*;
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
32	+	* A filter is an iscream component.
33		*
34		* @author  $Author$
35		* @version $Id$
36		*/
37	<	class FilterMain {
37	>	public class FilterMain implements Component {
38
39		//---FINAL ATTRIBUTES---
40
#	Line 26 | Line 45 | class FilterMain {
45
46		//---STATIC METHODS---
47
48	<	public static void main(String[] args) {
49	<	// ***************************************
50	<	// VERY TEMPORARY - will find a better way
51	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
52	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
53	<	// ***************************************
48	>	//---CONSTRUCTORS---
49	>
50	>	/**
51	>	* Constructs a Filter with the name given
52	>	*
53	>	* @param givenName the name
54	>	*/
55	>	public FilterMain(String givenName) {
56	>	NAME = givenName;
57	>	}
58
59	<	// get our name from the command line
60	<	String ourName = "";
61	<	if (args.length == 1) {
62	<	ourName = args[0];
59	>	//---PUBLIC METHODS---
60	>
61	>	/**
62	>	* Starts the Filter component
63	>	*/
64	>	public void start() throws ComponentStartException {
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	<	else {
88	<	usage();
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	<	// can't have a real toString() :)
107	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
47	<
48	<	ReferenceManager refman = ReferenceManager.init(null, ourName);
106	>	// need to use the Queue later on
107	>	Queue queue;
108
109	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
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
53	<	int UDPListenPort = 0;
54	<	int TCPListenPort = 0;
55	<	String parentFilterName = null;
56	<
57	<	Configuration config = refman.getCM().getConfiguration(refman.getName());
58	<	if (config == null) {
59	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
60	<	"         Advise you check the i-scream log for more information.");
61	<	} 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	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
145	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
69	<	"         Advise you check the i-scream log for more information.");
70	<
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	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
154	<	// get parent
155	<	Filter parentFilter = FilterHelper.narrow(refman.getCORBARef("iscream.Filter." + parentFilterName));
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	<
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
79	–	// FilterServant start (for inbound child filter data)
80	–	refman.getLogger().write(toString, Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
81	–	FilterServant filterServant = new FilterServant(parentFilter, TCPListenPort, UDPListenPort);
82	–	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
83	–
84	–	// UDL Reader start (for inbound host data)
85	–	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter UDP listener");
86	–	UDPReader udpReader = new UDPReader(UDPListenPort, parentFilter);
87	–	udpReader.start();
88	–
163		// TCP Reader start (for heartbeats)
164	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter TCP listener");
165	<	TCPReader tcpReader = new TCPReader(TCPListenPort, parentFilter);
166	<	tcpReader.start();
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 the POA off
180	<	// now we are running, we just need to serve
181	<	// so we ask the orb to block for us until it has finished
182	<	refman.activatePOA();
183	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
184	<	refman.getORB().run();
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	>	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	<
211	<	/**
212	<	* A simple method to print the usage of this class.
213	<	* It never returns, but instead exits to the system
214	<	* with a value 1, to indicate the system did not start
215	<	* properly.
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 static void usage() {
219	<	System.out.println("USAGE: java FilterMain <name>");
220	<	System.out.println("WHERE <name>:");
221	<	System.out.println("      The unique identifier for the Filter in the system.");
222	<	System.exit(1);
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.org.iscream.cms.server.util.NameFormat class
244	+	* to format the toString()
245	+	*
246	+	* @return the name of this class and its CVS revision
247	+	*/
248	+	public String toString() {
249	+	return FormatName.getName(
250	+	NAME,
251	+	getClass().getName(),
252	+	REVISION);
253	+	}
254
115	–	//---CONSTRUCTORS---
116	–
117	–	//---PUBLIC METHODS---
118	–
255		//---PRIVATE METHODS---
256
257		//---ACCESSOR/MUTATOR METHODS---
258
259		//---ATTRIBUTES---
260
261	+	/**
262	+	* This holds a reference to the
263	+	* system logger that is being used.
264	+	*/
265	+	private Logger _logger;
266	+
267	+	/**
268	+	* A reference to the reference manager in use
269	+	*/
270	+	private ReferenceManager _refman = ReferenceManager.getInstance();
271	+
272		//---STATIC ATTRIBUTES---
273
274	<	}
274	>	/**
275	>	* The friendly name for this component, used by
276	>	* all related classes.
277	>	* This is set from the configuration.
278	>	*/
279	>	public static String NAME;
280	>
281	>	}

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