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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 1.5 by ajm, Thu Nov 30 03:06:39 2000 UTC vs.
Revision 1.42 by tdb, Wed Feb 5 16:43:48 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.*;
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 FilterMain {
42	>	public class RootFilter implements Component {
43
44		//---FINAL ATTRIBUTES---
45
#	Line 19 | Line 47 | class FilterMain {
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) {
26	<	// ***************************************
27	<	// VERY TEMPORARY - will find a better way
28	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
29	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
30	<	// ***************************************
53	>	//---CONSTRUCTORS---
54
55	<	ReferenceManager refman = ReferenceManager.init(null, null);
33	<
34	<	// can't have a real toString() :)
35	<	String toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
55	>	//---PUBLIC METHODS---
56
57	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
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	>	_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	>	// try and get the names of the ciReal and ciDB
78	>	String realInterface, dbInterface;
79	>	// first realtime
80	>	try {
81	>	realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName");
82	>	} catch (PropertyNotFoundException e) {
83	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
84	>	realInterface = null;
85	>	}
86	>	// next dbi
87	>	try {
88	>	dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName");
89	>	} catch (PropertyNotFoundException e) {
90	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
91	>	dbInterface = null;
92	>	}
93	>
94	>	ClientInterface ciReal = null, ciDB = null;
95	>	// get reference to the client interfaces - the real time one
96	>	if (realInterface != null) {
97	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface\\." + realInterface));
98	>	}
99	>	// get reference to the client interfaces - and the db one
100	>	if (dbInterface != null) {
101	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface\\." + dbInterface));
102	>	}
103	>
104	>	// setup a queue
105	>	Queue queue;
106	>	// see if this Queue needs a size limit
107	>	try {
108	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
109	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
110	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
111	>	if(algorithm != -1) {
112	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
113	>	// we have valid values, so lets start it.
114	>	queue = new Queue(queueSizeLimit, algorithm);
115	>	}
116	>	else {
117	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
118	>	// just don't activate a limit
119	>	queue = new Queue();
120	>	}
121
122	<	// configuration variables we require
123	<	String ourName = null;
122	>	} catch (PropertyNotFoundException e) {
123	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
124	>	// just don't activate a limit
125	>	queue = new Queue();
126	>	} catch (NumberFormatException e) {
127	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
128	>	// just don't activate a limit
129	>	queue = new Queue();
130	>	}
131
132	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
133	<	if (config == null) {
134	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
135	<	"         Advise you check the i-scream log for more information.");
132	>	// startup a monitor on this queue
133	>	try {
134	>	// try to get the interval, if this fails, we won't start up the monitor
135	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
136	>	String queueName = NAME + " RootFilter";
137	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
138	>	} catch (PropertyNotFoundException e) {
139	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
140	>	}
141	>
142	>	if (realInterface != null && dbInterface != null) {
143	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
144	>	CIWrapper c = new CIWrapper(ciReal, queue);
145	>	c.start();
146	>	c = new CIWrapper(ciDB, queue);
147	>	c.start();
148	>	} else if (realInterface == null) {
149	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
150	>	CIWrapper c = new CIWrapper(ciDB, queue);
151	>	c.start();
152	>	} else if (dbInterface == null) {
153	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
154	>	CIWrapper c = new CIWrapper(ciReal, queue);
155	>	c.start();
156		} else {
157	<	try {
48	<	ourName = config.getProperty("Filter.rootFilter");
49	<	} catch (org.omg.CORBA.MARSHAL e) {
50	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
51	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
52	<	"         Advise you check the i-scream log for more information.");
53	<
54	<	}
157	>	_logger.write(toString(), Logger.WARNING, "not hooked to any client interfaces, this is probably not intentional!");
158		}
159	<	// now we have the name of the Root Filter we set it
160	<	refman.setName(ourName);
161	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
159	>
160	>	// RootFilterServant start (for inbound child filter data)
161	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
162	>	RootFilterServant filterServant = new RootFilterServant(queue);
163	>	// bind to the naming service as a filter
164	>	_refman.bindToOrb(filterServant, "iscream.Filter\\." + RootFilter.NAME);
165
166	<	// FilterServant start (for inbound child filter data)
61	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
62	<	RootFilterServant filterServant = new RootFilterServant();
63	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
166	>	_logger.write(toString(), Logger.SYSINIT, "started");
167
65	–	// start the POA off
66	–	// now we are running, we just need to serve
67	–	// so we ask the orb to block for us until it has finished
68	–	refman.activatePOA();
69	–	refman.getLogger().write(toString, Logger.SYSINIT, "started");
70	–	refman.getORB().run();
168		}
169	<
170	<	/**
171	<	* A simple method to print the usage of this class.
172	<	* It never returns, but instead exits to the system
173	<	* with a value 1, to indicate the system did not start
174	<	* properly.
169	>
170	>	/**
171	>	* Does a dependency check. Used mainly at startup to
172	>	* see if the required dependencies (components) are up
173	>	* and running.
174	>	*
175	>	* @return a boolean value, true if the depdencies are satisfied
176		*/
177	<	public static void usage() {
178	<	System.out.println("USAGE: java FilterMain <name>");
179	<	System.out.println("WHERE <name>:");
180	<	System.out.println("      The unique identifier for the Filter in the system.");
181	<	System.exit(1);
177	>	public boolean depCheck() {
178	>	org.omg.CORBA.Object obj;
179	>
180	>	// first we need to check the Configuration system is available
181	>	try {
182	>	// first check the ConfigurationManager is alive
183	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
184	>	} catch(ComponentCORBAException e) {
185	>	System.err.println(toString() + ": Dependency Failure: "+e);
186	>	return false;
187	>	}
188	>
189	>	// next we need to check which client interfaces *should*
190	>	// be active, and check them. Note they do not have to
191	>	// be enabled, and we should check this.
192	>	// -- each check only forces a dependency if it's configured
193	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
194	>	// first check the client interface
195	>	try {
196	>	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
197	>	obj = _refman.getCORBARef("iscream.ClientInterface\\." + cli);
198	>	} catch(ComponentCORBAException e) {
199	>	System.err.println(toString() + ": Dependency Failure: "+e);
200	>	return false;
201	>	} catch(PropertyNotFoundException e) {
202	>	System.err.println(toString() + ": Client interface not configured and thus not enabled.");
203	>	}
204	>	// second check the database interface
205	>	try {
206	>	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
207	>	obj = _refman.getCORBARef("iscream.ClientInterface\\." + dbi);
208	>	} catch(ComponentCORBAException e) {
209	>	System.err.println(toString() + ": Dependency Failure: "+e);
210	>	return false;
211	>	} catch(PropertyNotFoundException e) {
212	>	System.err.println(toString() + ": Database interface not configured and thus not enabled.");
213	>	}
214	>
215	>	// dependency check suceeded
216	>	return true;
217		}
218	+
219	+	/**
220	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
221	+	* method to provide clean logging (every class should have this).
222	+	*
223	+	* This uses the uk.org.iscream.cms.util.NameFormat class
224	+	* to format the toString()
225	+	*
226	+	* @return the name of this class and its CVS revision
227	+	*/
228	+	public String toString() {
229	+	return FormatName.getName(
230	+	NAME,
231	+	getClass().getName(),
232	+	REVISION);
233	+	}
234
86	–	//---CONSTRUCTORS---
87	–
88	–	//---PUBLIC METHODS---
89	–
235		//---PRIVATE METHODS---
236
237		//---ACCESSOR/MUTATOR METHODS---
238
239		//---ATTRIBUTES---
240
241	+	/**
242	+	* This holds a reference to the
243	+	* system logger that is being used.
244	+	*/
245	+	private Logger _logger;
246	+
247	+	/**
248	+	* A reference to the reference manager in use
249	+	*/
250	+	private ReferenceManager _refman = ReferenceManager.getInstance();
251	+
252		//---STATIC ATTRIBUTES---
253	+
254	+	/**
255	+	* The friendly name for this component, used by
256	+	* all related classes.
257	+	* This is set from the configuration.
258	+	*/
259	+	public static String NAME;
260
261		}

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