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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 1.39 by tdb, Sat May 18 18:16:02 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	+
21		//---PACKAGE DECLARATION---
22	<	package uk.ac.ukc.iscream.rootfilter;
22	>	package uk.org.iscream.cms.server.rootfilter;
23
24		//---IMPORTS---
25	<	import uk.ac.ukc.iscream.util.*;
26	<	import uk.ac.ukc.iscream.core.*;
27	<	import uk.ac.ukc.iscream.clientinterface.*;
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.clientinterface.*;
29
30		/**
31		* The root filter is what all filters talk to
#	Line 17 | Line 38 | import uk.ac.ukc.iscream.clientinterface.*;
38		* @author  $Author$
39		* @version $Id$
40		*/
41	<	public class RootFilter implements uk.ac.ukc.iscream.util.Component {
41	>	public class RootFilter implements Component {
42
43		//---FINAL ATTRIBUTES---
44
#	Line 36 | Line 57 | public class RootFilter implements uk.ac.ukc.iscream.u
57		* This starts the Root Filter for the system
58		*/
59		public void start() throws ComponentStartException {
60	<
60	>	// get references to key objects
61	>	_logger = _refman.getLogger();
62	>
63		_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;
64
65	<	Configuration config = _refman.getCM().getConfiguration("RootFilter");
66	<	if (config == null) {
67	<	System.err.println("CRITICAL:Unable to obtain configuration" +
68	<	"\n         Advise you check the i-scream log for more information.");
69	<	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
70	<	System.exit(1);
71	<	} else {
72	<	try {
73	<	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	<	}
65	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
66	>	String configName = "RootFilter";
67	>
68	>	// set the name of the root filter
69	>	try {
70	>	NAME = cp.getProperty(configName, "RootFilter.name");
71	>	} catch (PropertyNotFoundException e) {
72	>	NAME = null;
73	>	_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e);
74		}
65	–	// now we have the name of the Root Filter we set it
66	–	NAME = ourName;
75
76	<	_logger.write(toString(), Logger.SYSINIT, "configured");
77	<
76	>	// try and get the names of the ciReal and ciDB
77	>	String realInterface, dbInterface;
78	>	// first realtime
79	>	try {
80	>	realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName");
81	>	} catch (PropertyNotFoundException e) {
82	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
83	>	realInterface = null;
84	>	}
85	>	// next dbi
86	>	try {
87	>	dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName");
88	>	} catch (PropertyNotFoundException e) {
89	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
90	>	dbInterface = null;
91	>	}
92	>
93	>	ClientInterface ciReal = null, ciDB = null;
94		// get reference to the client interfaces - the real time one
95	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
95	>	if (realInterface != null) {
96	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
97	>	}
98		// get reference to the client interfaces - and the db one
99	<	ClientInterface ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
100	<	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
99	>	if (dbInterface != null) {
100	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
101	>	}
102
103	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
103	>	// setup a queue
104	>	Queue queue;
105	>	// see if this Queue needs a size limit
106	>	try {
107	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
108	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
109	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
110	>	if(algorithm != -1) {
111	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
112	>	// we have valid values, so lets start it.
113	>	queue = new Queue(queueSizeLimit, algorithm);
114	>	}
115	>	else {
116	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
117	>	// just don't activate a limit
118	>	queue = new Queue();
119	>	}
120	>
121	>	} catch (PropertyNotFoundException e) {
122	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
123	>	// just don't activate a limit
124	>	queue = new Queue();
125	>	} catch (NumberFormatException e) {
126	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
127	>	// just don't activate a limit
128	>	queue = new Queue();
129	>	}
130
131	+	// startup a monitor on this queue
132	+	try {
133	+	// try to get the interval, if this fails, we won't start up the monitor
134	+	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
135	+	String queueName = NAME + " RootFilter";
136	+	queue.startMonitor(queueMonitorInterval*1000, queueName);
137	+	} catch (PropertyNotFoundException e) {
138	+	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
139	+	}
140	+
141	+	if (realInterface != null && dbInterface != null) {
142	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
143	+	CIWrapper c = new CIWrapper(ciReal, queue);
144	+	c.start();
145	+	c = new CIWrapper(ciDB, queue);
146	+	c.start();
147	+	} else if (realInterface == null) {
148	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
149	+	CIWrapper c = new CIWrapper(ciDB, queue);
150	+	c.start();
151	+	} else if (dbInterface == null) {
152	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
153	+	CIWrapper c = new CIWrapper(ciReal, queue);
154	+	c.start();
155	+	} else {
156	+	_logger.write(toString(), Logger.WARNING, "not hooked to any client interfaces, this is probably not intentional!");
157	+	}
158	+
159		// RootFilterServant start (for inbound child filter data)
160		_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
161	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
161	>	RootFilterServant filterServant = new RootFilterServant(queue);
162		// bind to the naming service as a filter
163	<	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
163	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
164
165		_logger.write(toString(), Logger.SYSINIT, "started");
166	+
167		}
168
169		/**
170	+	* Does a dependency check. Used mainly at startup to
171	+	* see if the required dependencies (components) are up
172	+	* and running.
173	+	*
174	+	* @return a boolean value, true if the depdencies are satisfied
175	+	*/
176	+	public boolean depCheck() {
177	+	org.omg.CORBA.Object obj;
178	+
179	+	// first we need to check the Configuration system is available
180	+	try {
181	+	// first check the ConfigurationManager is alive
182	+	obj = _refman.getCORBARef("iscream.ConfigurationManager");
183	+	} catch(ComponentCORBAException e) {
184	+	System.err.println(toString() + ": Dependency Failure: "+e);
185	+	return false;
186	+	}
187	+
188	+	// next we need to check which client interfaces *should*
189	+	// be active, and check them. Note they do not have to
190	+	// be enabled, and we should check this.
191	+	// -- each check only forces a dependency if it's configured
192	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
193	+	// first check the client interface
194	+	try {
195	+	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
196	+	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
197	+	} catch(ComponentCORBAException e) {
198	+	System.err.println(toString() + ": Dependency Failure: "+e);
199	+	return false;
200	+	} catch(PropertyNotFoundException e) {
201	+	System.err.println(toString() + ": Client interface not configured and thus not enabled.");
202	+	}
203	+	// second check the database interface
204	+	try {
205	+	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
206	+	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
207	+	} catch(ComponentCORBAException e) {
208	+	System.err.println(toString() + ": Dependency Failure: "+e);
209	+	return false;
210	+	} catch(PropertyNotFoundException e) {
211	+	System.err.println(toString() + ": Database interface not configured and thus not enabled.");
212	+	}
213	+
214	+	// dependency check suceeded
215	+	return true;
216	+	}
217	+
218	+	/**
219		* Overrides the {@link java.lang.Object#toString() Object.toString()}
220		* method to provide clean logging (every class should have this).
221		*
222	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
222	>	* This uses the uk.org.iscream.cms.server.util.NameFormat class
223		* to format the toString()
224		*
225		* @return the name of this class and its CVS revision
226		*/
227		public String toString() {
228		return FormatName.getName(
229	<	_name,
229	>	NAME,
230		getClass().getName(),
231		REVISION);
232		}
#	Line 107 | Line 238 | public class RootFilter implements uk.ac.ukc.iscream.u
238		//---ATTRIBUTES---
239
240		/**
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	–	/**
241		* This holds a reference to the
242		* system logger that is being used.
243		*/
244	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
244	>	private Logger _logger;
245
246		/**
247		* A reference to the reference manager in use

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