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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/rootfilter/RootFilter.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/rootfilter/RootFilter.java (file contents):
Revision 1.8 by ajm, Mon Dec 4 18:12:13 2000 UTC vs.
Revision 1.43 by tdb, Mon May 5 22:05:14 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	+
22		//---PACKAGE DECLARATION---
23	<	package uk.ac.ukc.iscream.rootfilter;
23	>	package uk.org.iscream.cms.server.rootfilter;
24
25		//---IMPORTS---
26	<	import uk.ac.ukc.iscream.util.*;
27	<	import uk.ac.ukc.iscream.core.*;
28	<	import uk.ac.ukc.iscream.clientinterface.*;
26	>	import uk.org.iscream.cms.util.*;
27	>	import uk.org.iscream.cms.server.core.*;
28	>	import uk.org.iscream.cms.server.componentmanager.*;
29	>	import uk.org.iscream.cms.server.clientinterface.*;
30
31		/**
32	<	* A Filter Startup Class
32	>	* The root filter is what all filters talk to
33	>	* Hosts cannot talk to this implementation of a filter.
34	>	* It provides hooks to all data interfaces for the system
35	>	* namely the client interface and the db interface.
36	>	* This is an i-scream component that starts the
37	>	* RootFilter services.
38		*
39		* @author  $Author$
40		* @version $Id$
41		*/
42	<	class RootFilterMain {
42	>	public class RootFilter implements Component {
43
44		//---FINAL ATTRIBUTES---
45
#	Line 20 | Line 47 | class RootFilterMain {
47		* The current CVS revision of this class
48		*/
49		public static final String REVISION = "$Revision$";
50	<
50	>
51		//---STATIC METHODS---
52
53	<	public static void main(String[] args) {
27	<	// ***************************************
28	<	// VERY TEMPORARY - will find a better way
29	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
30	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
31	<	// ***************************************
53	>	//---CONSTRUCTORS---
54
55	<	ReferenceManager refman = ReferenceManager.init(null, null);
34	<
35	<	// can't have a real toString() :)
36	<	String toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
55	>	//---PUBLIC METHODS---
56
57	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
58	<
59	<	// configuration variables we require
60	<	String ourName = null;
61	<	String realInterface = null;
62	<	String dbInterface = null;
57	>	/**
58	>	* This starts the Root Filter for the system
59	>	*/
60	>	public void start() throws ComponentStartException {
61	>	// get references to key objects
62	>	_logger = _refman.getLogger();
63
64	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
65	<	if (config == null) {
66	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
67	<	"         Advise you check the i-scream log for more information.");
68	<	} else {
69	<	try {
70	<	ourName = config.getProperty("RootFilter.name");
71	<	realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
72	<	dbInterface = config.getProperty("RootFilter.dbInterfaceName");
73	<	} catch (org.omg.CORBA.MARSHAL e) {
74	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
75	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
76	<	"         Advise you check the i-scream log for more information.");
77	<
64	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
65	>
66	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
67	>	String configName = "RootFilter";
68	>
69	>	// set the name of the root filter
70	>	try {
71	>	NAME = cp.getProperty(configName, "RootFilter.name");
72	>	} catch (PropertyNotFoundException e) {
73	>	NAME = null;
74	>	_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e);
75	>	}
76	>
77	>	// setup a queue
78	>	Queue queue;
79	>	// see if this Queue needs a size limit
80	>	try {
81	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
82	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
83	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
84	>	if(algorithm != -1) {
85	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
86	>	// we have valid values, so lets start it.
87	>	queue = new Queue(queueSizeLimit, algorithm);
88		}
89	+	else {
90	+	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
91	+	// just don't activate a limit
92	+	queue = new Queue();
93	+	}
94	+
95	+	} catch (PropertyNotFoundException e) {
96	+	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
97	+	// just don't activate a limit
98	+	queue = new Queue();
99	+	} catch (NumberFormatException e) {
100	+	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
101	+	// just don't activate a limit
102	+	queue = new Queue();
103		}
61	–	// now we have the name of the Root Filter we set it
62	–	refman.setName(ourName);
63	–	toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
64	–	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
65	–
66	–	// get reference to the client interfaces - the real time one
67	–	ClientInterface ciReal = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + realInterface));
68	–	// - the db one ... but it's not done yet
69	–	//ClientInterface ciDB = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + dbInterface));
70	–	// so for the time being we null it.
71	–	ClientInterface ciDB = null;
72	–	refman.getLogger().write(toString, Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
104
105	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
105	>	// startup a monitor on this queue
106	>	try {
107	>	// try to get the interval, if this fails, we won't start up the monitor
108	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
109	>	String queueName = NAME + " RootFilter";
110	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
111	>	} catch (PropertyNotFoundException e) {
112	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
113	>	}
114
115		// RootFilterServant start (for inbound child filter data)
116	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
117	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
116	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
117	>	RootFilterServant filterServant = new RootFilterServant(queue);
118		// bind to the naming service as a filter
119	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
119	>	_refman.bindToOrb(filterServant, "iscream.Filter\\." + RootFilter.NAME);
120
121	<	// start the POA off
122	<	// now we are running, we just need to serve
123	<	// so we ask the orb to block for us until it has finished
124	<	refman.activatePOA();
125	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
126	<	refman.getORB().run();
121	>	// Startup the CORBA Listener
122	>	_logger.write(toString(), Logger.DEBUG, "starting servant for inbound clients");
123	>	CorbaClientListenerServant corbaServant = new CorbaClientListenerServant(queue);
124	>	_refman.bindToOrb(corbaServant, "iscream.ClientInterface\\." + RootFilter.NAME);
125	>
126	>	_logger.write(toString(), Logger.SYSINIT, "started");
127	>
128		}
129	<
130	<	/**
131	<	* A simple method to print the usage of this class.
132	<	* It never returns, but instead exits to the system
133	<	* with a value 1, to indicate the system did not start
134	<	* properly.
129	>
130	>	/**
131	>	* Does a dependency check. Used mainly at startup to
132	>	* see if the required dependencies (components) are up
133	>	* and running.
134	>	*
135	>	* @return a boolean value, true if the depdencies are satisfied
136		*/
137	<	public static void usage() {
138	<	System.out.println("USAGE: java FilterMain <name>");
139	<	System.out.println("WHERE <name>:");
140	<	System.out.println("      The unique identifier for the Filter in the system.");
141	<	System.exit(1);
137	>	public boolean depCheck() {
138	>	org.omg.CORBA.Object obj;
139	>
140	>	// first we need to check the Configuration system is available
141	>	try {
142	>	// first check the ConfigurationManager is alive
143	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
144	>	} catch(ComponentCORBAException e) {
145	>	System.err.println(toString() + ": Dependency Failure: "+e);
146	>	return false;
147	>	}
148	>
149	>	// dependency check suceeded
150	>	return true;
151		}
152	+
153	+	/**
154	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
155	+	* method to provide clean logging (every class should have this).
156	+	*
157	+	* This uses the uk.org.iscream.cms.util.NameFormat class
158	+	* to format the toString()
159	+	*
160	+	* @return the name of this class and its CVS revision
161	+	*/
162	+	public String toString() {
163	+	return FormatName.getName(
164	+	NAME,
165	+	getClass().getName(),
166	+	REVISION);
167	+	}
168
103	–	//---CONSTRUCTORS---
104	–
105	–	//---PUBLIC METHODS---
106	–
169		//---PRIVATE METHODS---
170
171		//---ACCESSOR/MUTATOR METHODS---
172
173		//---ATTRIBUTES---
174
175	+	/**
176	+	* This holds a reference to the
177	+	* system logger that is being used.
178	+	*/
179	+	private Logger _logger;
180	+
181	+	/**
182	+	* A reference to the reference manager in use
183	+	*/
184	+	private ReferenceManager _refman = ReferenceManager.getInstance();
185	+
186		//---STATIC ATTRIBUTES---
187
188	<	}
188	>	/**
189	>	* The friendly name for this component, used by
190	>	* all related classes.
191	>	* This is set from the configuration.
192	>	*/
193	>	public static String NAME;
194	>
195	>	}

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