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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 1.10 by ajm, Tue Dec 12 19:54:55 2000 UTC vs.
Revision 1.40 by tdb, Tue May 21 16:47:18 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	+
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.server.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		* The root filter is what all filters talk to
#	Line 17 | Line 39 | import uk.ac.ukc.iscream.clientinterface.*;
39		* @author  $Author$
40		* @version $Id$
41		*/
42	<	public class RootFilter implements uk.ac.ukc.iscream.util.Component {
42	>	public class RootFilter implements Component {
43
44		//---FINAL ATTRIBUTES---
45
#	Line 36 | Line 58 | public class RootFilter implements uk.ac.ukc.iscream.u
58		* This starts the Root Filter for the system
59		*/
60		public void start() throws ComponentStartException {
61	<
61	>	// get references to key objects
62	>	_logger = _refman.getLogger();
63	>
64		_logger.write(toString(), Logger.SYSINIT, "coming up");
41	–
42	–	// configuration variables we require
43	–	String ourName = null;
44	–	String realInterface = null;
45	–	String dbInterface = null;
65
66	<	Configuration config = _refman.getCM().getConfiguration("RootFilter");
67	<	if (config == null) {
68	<	System.err.println("CRITICAL:Unable to obtain configuration" +
69	<	"\n         Advise you check the i-scream log for more information.");
70	<	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
71	<	System.exit(1);
72	<	} else {
73	<	try {
74	<	ourName = config.getProperty("RootFilter.name");
56	<	realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
57	<	dbInterface = config.getProperty("RootFilter.dbInterfaceName");
58	<	} catch (org.omg.CORBA.MARSHAL e) {
59	<	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
60	<	"\n         Advise you check the i-scream log for more information.");
61	<	_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
62	<	System.exit(1);
63	<	}
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		}
65	–	// now we have the name of the Root Filter we set it
66	–	NAME = ourName;
76
77	<	_logger.write(toString(), Logger.SYSINIT, "configured");
78	<
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	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
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	<	ClientInterface ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
101	<	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
100	>	if (dbInterface != null) {
101	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
102	>	}
103
104	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
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	>	} 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	+	// 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	+	_logger.write(toString(), Logger.WARNING, "not hooked to any client interfaces, this is probably not intentional!");
158	+	}
159	+
160		// RootFilterServant start (for inbound child filter data)
161		_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
162	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
162	>	RootFilterServant filterServant = new RootFilterServant(queue);
163		// bind to the naming service as a filter
164	<	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
164	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
165
166		_logger.write(toString(), Logger.SYSINIT, "started");
167	+
168		}
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 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.ac.ukc.iscream.util.NameFormat class
223	>	* This uses the uk.org.iscream.cms.server.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,
230	>	NAME,
231		getClass().getName(),
232		REVISION);
233		}
#	Line 107 | Line 239 | public class RootFilter implements uk.ac.ukc.iscream.u
239		//---ATTRIBUTES---
240
241		/**
110	–	* This is the friendly identifier of the
111	–	* component this class is running in.
112	–	* eg, a Filter may be called "filter1",
113	–	* If this class does not have an owning
114	–	* component,  a name from the configuration
115	–	* can be placed here.  This name could also
116	–	* be changed to null for utility classes.
117	–	*/
118	–	private String _name = RootFilter.NAME;
119	–
120	–	/**
242		* This holds a reference to the
243		* system logger that is being used.
244		*/
245	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
245	>	private Logger _logger;
246
247		/**
248		* A reference to the reference manager in use

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