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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 1.11 by ajm, Tue Dec 12 20:44:03 2000 UTC vs.
Revision 1.33 by tdb, Fri Mar 16 15:16:01 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		if (realInterface != null) {
71	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
71	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
72		}
73		// get reference to the client interfaces - and the db one
74		if (dbInterface != null) {
75	<	ClientInterface ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
75	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
76		}
77	<
78	<	ClientInterface[] clientInterfaces;
77	>
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	>	queue = new Queue(queueSizeLimit, algorithm);
87	>	}
88	>	else {
89	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
90	>	// just don't activate a limit
91	>	queue = new Queue();
92	>	}
93	>
94	>	} catch (PropertyNotFoundException e) {
95	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
96	>	// just don't activate a limit
97	>	queue = new Queue();
98	>	} catch (NumberFormatException e) {
99	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
100	>	// just don't activate a limit
101	>	queue = new Queue();
102	>	}
103	>
104	>	// startup a monitor on this queue
105	>	try {
106	>	// try to get the interval, if this fails, we won't start up the monitor
107	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
108	>	String queueName = NAME + " RootFilter";
109	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
110	>	} catch (PropertyNotFoundException e) {
111	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
112	>	}
113	>
114		if (realInterface == null) {
115		_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
116	<	clientInterfaces = {ciReal, ciDB};
116	>	CIWrapper c = new CIWrapper(ciDB, queue);
117	>	c.start();
118		} else if (dbInterface == null) {
119		_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
120	<	clientInterfaces = {ciReal};
120	>	CIWrapper c = new CIWrapper(ciReal, queue);
121	>	c.start();
122		} else {
123		_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
124	<	clientInterfaces = {ciReal, ciDB};
124	>	CIWrapper c = new CIWrapper(ciReal, queue);
125	>	c.start();
126	>	c = new CIWrapper(ciDB, queue);
127	>	c.start();
128		}
129	<
129	>
130		// RootFilterServant start (for inbound child filter data)
131		_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
132	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
132	>	RootFilterServant filterServant = new RootFilterServant(queue);
133		// bind to the naming service as a filter
134	<	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
134	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
135
136		_logger.write(toString(), Logger.SYSINIT, "started");
137	+
138		}
139
140		/**
141	+	* Does a dependency check. Used mainly at startup to
142	+	* see if the required dependencies (components) are up
143	+	* and running.
144	+	*
145	+	* @return a boolean value, true if the depdencies are satisfied
146	+	*/
147	+	public boolean depCheck() {
148	+	try {
149	+	org.omg.CORBA.Object obj;
150	+	// first check the ConfigurationManager is alive
151	+	obj = _refman.getCORBARef("iscream.ConfigurationManager");
152	+	// then get some info on the CLI and DBI
153	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
154	+	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
155	+	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
156	+	// finally check the CLI and DBI are alive
157	+	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
158	+	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
159	+	} catch(ComponentCORBAException e) {
160	+	System.err.println(toString() + ": Dependency Failure: "+e);
161	+	return false;
162	+	} catch(PropertyNotFoundException e) {
163	+	System.err.println(toString() + ": Unable to obtain configuration: "+e);
164	+	return false;
165	+	}
166	+	// dependency check suceeded
167	+	return true;
168	+	}
169	+
170	+	/**
171		* Overrides the {@link java.lang.Object#toString() Object.toString()}
172		* method to provide clean logging (every class should have this).
173		*
174	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
174	>	* This uses the uk.org.iscream.util.NameFormat class
175		* to format the toString()
176		*
177		* @return the name of this class and its CVS revision
178		*/
179		public String toString() {
180		return FormatName.getName(
181	<	_name,
181	>	NAME,
182		getClass().getName(),
183		REVISION);
184		}
#	Line 120 | Line 190 | public class RootFilter implements uk.ac.ukc.iscream.u
190		//---ATTRIBUTES---
191
192		/**
123	–	* This is the friendly identifier of the
124	–	* component this class is running in.
125	–	* eg, a Filter may be called "filter1",
126	–	* If this class does not have an owning
127	–	* component,  a name from the configuration
128	–	* can be placed here.  This name could also
129	–	* be changed to null for utility classes.
130	–	*/
131	–	private String _name = RootFilter.NAME;
132	–
133	–	/**
193		* This holds a reference to the
194		* system logger that is being used.
195		*/
196	<	private Logger _logger = ReferenceManager.getInstance().getLogger();
196	>	private Logger _logger;
197
198		/**
199		* A reference to the reference manager in use

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