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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 1.35 by tdb, Fri Mar 23 04:57:09 2001 UTC

#	Line 1 | Line 1
1	+
2		//---PACKAGE DECLARATION---
3	<	package uk.ac.ukc.iscream.rootfilter;
3	>	package uk.org.iscream.rootfilter;
4
5		//---IMPORTS---
6	<	import uk.ac.ukc.iscream.util.*;
7	<	import uk.ac.ukc.iscream.core.*;
8	<	import uk.ac.ukc.iscream.clientinterface.*;
6	>	import uk.org.iscream.util.*;
7	>	import uk.org.iscream.core.*;
8	>	import uk.org.iscream.componentmanager.*;
9	>	import uk.org.iscream.clientinterface.*;
10
11		/**
12		* The root filter is what all filters talk to
#	Line 17 | Line 19 | import uk.ac.ukc.iscream.clientinterface.*;
19		* @author  $Author$
20		* @version $Id$
21		*/
22	<	public class RootFilter implements uk.ac.ukc.iscream.util.Component {
22	>	public class RootFilter implements Component {
23
24		//---FINAL ATTRIBUTES---
25
#	Line 36 | Line 38 | public class RootFilter implements uk.ac.ukc.iscream.u
38		* This starts the Root Filter for the system
39		*/
40		public void start() throws ComponentStartException {
41	<
41	>	// get references to key objects
42	>	_logger = _refman.getLogger();
43	>
44		_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;
45
46	<	Configuration config = _refman.getCM().getConfiguration("RootFilter");
47	<	if (config == null) {
48	<	System.err.println("CRITICAL:Unable to obtain configuration" +
49	<	"\n         Advise you check the i-scream log for more information.");
50	<	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
51	<	System.exit(1);
52	<	} else {
53	<	try {
54	<	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	<	}
46	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
47	>	String configName = "RootFilter";
48	>
49	>	// set the name of the root filter
50	>	try {
51	>	NAME = cp.getProperty(configName, "RootFilter.name");
52	>	} catch (PropertyNotFoundException e) {
53	>	NAME = null;
54	>	_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e);
55		}
65	–	// now we have the name of the Root Filter we set it
66	–	NAME = ourName;
56
57	<	_logger.write(toString(), Logger.SYSINIT, "configured");
58	<
57	>	// try and get the names of the ciReal and ciDB
58	>	String realInterface, dbInterface;
59	>	try {
60	>	realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName");
61	>	dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName");
62	>	} catch (PropertyNotFoundException e) {
63	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
64	>	realInterface = null;
65	>	dbInterface = null;
66	>	}
67	>
68	>	ClientInterface ciReal = null, ciDB = null;
69		// get reference to the client interfaces - the real time one
70	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
70	>	if (realInterface != null) {
71	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
72	>	}
73		// get reference to the client interfaces - and the db one
74	<	ClientInterface ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
75	<	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
74	>	if (dbInterface != null) {
75	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
76	>	}
77
78	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
78	>	// setup a queue
79	>	Queue queue;
80	>	// see if this Queue needs a size limit
81	>	try {
82	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
83	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
84	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
85	>	if(algorithm != -1) {
86	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
87	>	// we have valid values, so lets start it.
88	>	queue = new Queue(queueSizeLimit, algorithm);
89	>	}
90	>	else {
91	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
92	>	// just don't activate a limit
93	>	queue = new Queue();
94	>	}
95	>
96	>	} catch (PropertyNotFoundException e) {
97	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
98	>	// just don't activate a limit
99	>	queue = new Queue();
100	>	} catch (NumberFormatException e) {
101	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
102	>	// just don't activate a limit
103	>	queue = new Queue();
104	>	}
105
106	+	// startup a monitor on this queue
107	+	try {
108	+	// try to get the interval, if this fails, we won't start up the monitor
109	+	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
110	+	String queueName = NAME + " RootFilter";
111	+	queue.startMonitor(queueMonitorInterval*1000, queueName);
112	+	} catch (PropertyNotFoundException e) {
113	+	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
114	+	}
115	+
116	+	if (realInterface == null) {
117	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
118	+	CIWrapper c = new CIWrapper(ciDB, queue);
119	+	c.start();
120	+	} else if (dbInterface == null) {
121	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
122	+	CIWrapper c = new CIWrapper(ciReal, queue);
123	+	c.start();
124	+	} else {
125	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
126	+	CIWrapper c = new CIWrapper(ciReal, queue);
127	+	c.start();
128	+	c = new CIWrapper(ciDB, queue);
129	+	c.start();
130	+	}
131	+
132		// RootFilterServant start (for inbound child filter data)
133		_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
134	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
134	>	RootFilterServant filterServant = new RootFilterServant(queue);
135		// bind to the naming service as a filter
136	<	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
136	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
137
138		_logger.write(toString(), Logger.SYSINIT, "started");
139	+
140		}
141
142		/**
143	+	* Does a dependency check. Used mainly at startup to
144	+	* see if the required dependencies (components) are up
145	+	* and running.
146	+	*
147	+	* @return a boolean value, true if the depdencies are satisfied
148	+	*/
149	+	public boolean depCheck() {
150	+	org.omg.CORBA.Object obj;
151	+
152	+	// first we need to check the Configuration system is available
153	+	try {
154	+	// first check the ConfigurationManager is alive
155	+	obj = _refman.getCORBARef("iscream.ConfigurationManager");
156	+	} catch(ComponentCORBAException e) {
157	+	System.err.println(toString() + ": Dependency Failure: "+e);
158	+	return false;
159	+	}
160	+
161	+	// next we need to check which client interfaces *should*
162	+	// be active, and check them. Note they do not have to
163	+	// be enabled, and we should check this.
164	+	// -- each check only forces a dependency if it's configured
165	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
166	+	// first check the client interface
167	+	try {
168	+	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
169	+	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
170	+	} catch(ComponentCORBAException e) {
171	+	System.err.println(toString() + ": Dependency Failure: "+e);
172	+	return false;
173	+	} catch(PropertyNotFoundException e) {
174	+	System.err.println(toString() + ": Client interface not configured and thus not enabled.");
175	+	}
176	+	// second check the database interface
177	+	try {
178	+	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
179	+	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
180	+	} catch(ComponentCORBAException e) {
181	+	System.err.println(toString() + ": Dependency Failure: "+e);
182	+	return false;
183	+	} catch(PropertyNotFoundException e) {
184	+	System.err.println(toString() + ": Database interface not configured and thus not enabled.");
185	+	}
186	+
187	+	// dependency check suceeded
188	+	return true;
189	+	}
190	+
191	+	/**
192		* Overrides the {@link java.lang.Object#toString() Object.toString()}
193		* method to provide clean logging (every class should have this).
194		*
195	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
195	>	* This uses the uk.org.iscream.util.NameFormat class
196		* to format the toString()
197		*
198		* @return the name of this class and its CVS revision
199		*/
200		public String toString() {
201		return FormatName.getName(
202	<	_name,
202	>	NAME,
203		getClass().getName(),
204		REVISION);
205		}
#	Line 107 | Line 211 | public class RootFilter implements uk.ac.ukc.iscream.u
211		//---ATTRIBUTES---
212
213		/**
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	–	/**
214		* This holds a reference to the
215		* system logger that is being used.
216		*/
217	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
217	>	private Logger _logger;
218
219		/**
220		* A reference to the reference manager in use

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