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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 1.35 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.refman.*;
25	<	import uk.ac.ukc.iscream.core.*;
26	<	import uk.ac.ukc.iscream.filter.*;
27	<	import org.omg.CORBA.*;
9	<	import org.omg.CosNaming.*;
10	<	import org.omg.PortableServer.*;
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
31	+	* A filter is an iscream component.
32		*
33		* @author  $Author$
34		* @version $Id$
35		*/
36	<	class FilterMain {
36	>	public class FilterMain implements Component {
37
38		//---FINAL ATTRIBUTES---
39
#	Line 26 | Line 44 | class FilterMain {
44
45		//---STATIC METHODS---
46
47	<	public static void main(String[] args) {
48	<	// ***************************************
49	<	// VERY TEMPORARY - will find a better way
50	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
51	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
52	<	// ***************************************
47	>	//---CONSTRUCTORS---
48	>
49	>	/**
50	>	* Constructs a Filter with the name given
51	>	*
52	>	* @param givenName the name
53	>	*/
54	>	public FilterMain(String givenName) {
55	>	NAME = givenName;
56	>	}
57
58	<	// get our name from the command line
59	<	String ourName = "";
60	<	if (args.length == 1) {
61	<	ourName = args[0];
58	>	//---PUBLIC METHODS---
59	>
60	>	/**
61	>	* Starts the Filter component
62	>	*/
63	>	public void start() throws ComponentStartException {
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	<	else {
87	<	usage();
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	<	// can't have a real toString() :)
106	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
47	<
48	<	ReferenceManager refman = ReferenceManager.init(null, ourName);
105	>	// need to use the Queue later on
106	>	Queue queue;
107
108	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
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
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 {
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	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
144	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
69	<	"         Advise you check the i-scream log for more information.");
70	<
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	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
153	<	// get parent
154	<	Filter parentFilter = FilterHelper.narrow(refman.getCORBARef("iscream.Filter." + parentFilterName));
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	<
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
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	–
162		// TCP Reader start (for heartbeats)
163	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter TCP listener");
164	<	TCPReader tcpReader = new TCPReader(TCPListenPort, parentFilter);
165	<	tcpReader.start();
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 the POA off
179	<	// now we are running, we just need to serve
180	<	// so we ask the orb to block for us until it has finished
181	<	refman.activatePOA();
182	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
183	<	refman.getORB().run();
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	>	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	<
210	<	/**
211	<	* A simple method to print the usage of this class.
212	<	* It never returns, but instead exits to the system
213	<	* with a value 1, to indicate the system did not start
214	<	* properly.
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 static void usage() {
218	<	System.out.println("USAGE: java FilterMain <name>");
219	<	System.out.println("WHERE <name>:");
220	<	System.out.println("      The unique identifier for the Filter in the system.");
221	<	System.exit(1);
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.org.iscream.cms.server.util.NameFormat class
243	+	* to format the toString()
244	+	*
245	+	* @return the name of this class and its CVS revision
246	+	*/
247	+	public String toString() {
248	+	return FormatName.getName(
249	+	NAME,
250	+	getClass().getName(),
251	+	REVISION);
252	+	}
253
115	–	//---CONSTRUCTORS---
116	–
117	–	//---PUBLIC METHODS---
118	–
254		//---PRIVATE METHODS---
255
256		//---ACCESSOR/MUTATOR METHODS---
257
258		//---ATTRIBUTES---
259
260	+	/**
261	+	* This holds a reference to the
262	+	* system logger that is being used.
263	+	*/
264	+	private Logger _logger;
265	+
266	+	/**
267	+	* A reference to the reference manager in use
268	+	*/
269	+	private ReferenceManager _refman = ReferenceManager.getInstance();
270	+
271		//---STATIC ATTRIBUTES---
272
273	<	}
273	>	/**
274	>	* The friendly name for this component, used by
275	>	* all related classes.
276	>	* This is set from the configuration.
277	>	*/
278	>	public static String NAME;
279	>
280	>	}

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