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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 1.8 by ajm, Mon Dec 4 18:12:13 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	<	* A Filter Startup Class
12	>	* The root filter is what all filters talk to
13	>	* Hosts cannot talk to this implementation of a filter.
14	>	* It provides hooks to all data interfaces for the system
15	>	* namely the client interface and the db interface.
16	>	* This is an i-scream component that starts the
17	>	* RootFilter services.
18		*
19		* @author  $Author$
20		* @version $Id$
21		*/
22	<	class RootFilterMain {
22	>	public class RootFilter implements Component {
23
24		//---FINAL ATTRIBUTES---
25
#	Line 20 | Line 27 | class RootFilterMain {
27		* The current CVS revision of this class
28		*/
29		public static final String REVISION = "$Revision$";
30	<
30	>
31		//---STATIC METHODS---
32
33	<	public static void main(String[] args) {
27	<	// ***************************************
28	<	// VERY TEMPORARY - will find a better way
29	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
30	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
31	<	// ***************************************
33	>	//---CONSTRUCTORS---
34
35	<	ReferenceManager refman = ReferenceManager.init(null, null);
34	<
35	<	// can't have a real toString() :)
36	<	String toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
35	>	//---PUBLIC METHODS---
36
37	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
38	<
39	<	// configuration variables we require
40	<	String ourName = null;
41	<	String realInterface = null;
42	<	String dbInterface = null;
37	>	/**
38	>	* This starts the Root Filter for the system
39	>	*/
40	>	public void start() throws ComponentStartException {
41	>	// get references to key objects
42	>	_logger = _refman.getLogger();
43
44	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
45	<	if (config == null) {
46	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
47	<	"         Advise you check the i-scream log for more information.");
48	<	} else {
49	<	try {
50	<	ourName = config.getProperty("RootFilter.name");
51	<	realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
52	<	dbInterface = config.getProperty("RootFilter.dbInterfaceName");
53	<	} catch (org.omg.CORBA.MARSHAL e) {
54	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
56	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
57	<	"         Advise you check the i-scream log for more information.");
58	<
59	<	}
44	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
45	>
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		}
56	<	// now we have the name of the Root Filter we set it
57	<	refman.setName(ourName);
58	<	toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
59	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
60	<
56	>
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));
71	<	// - the db one ... but it's not done yet
72	<	//ClientInterface ciDB = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + dbInterface));
73	<	// so for the time being we null it.
74	<	ClientInterface ciDB = null;
75	<	refman.getLogger().write(toString, Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
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	>	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	>	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	+	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	+	CIWrapper c = new CIWrapper(ciReal, queue);
121	+	c.start();
122	+	} else {
123	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
124	+	CIWrapper c = new CIWrapper(ciReal, queue);
125	+	c.start();
126	+	c = new CIWrapper(ciDB, queue);
127	+	c.start();
128	+	}
129	+
130		// RootFilterServant start (for inbound child filter data)
131	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
132	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
131	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
132	>	RootFilterServant filterServant = new RootFilterServant(queue);
133		// bind to the naming service as a filter
134	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
134	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
135
136	<	// start the POA off
137	<	// now we are running, we just need to serve
84	<	// so we ask the orb to block for us until it has finished
85	<	refman.activatePOA();
86	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
87	<	refman.getORB().run();
136	>	_logger.write(toString(), Logger.SYSINIT, "started");
137	>
138		}
139	<
140	<	/**
141	<	* A simple method to print the usage of this class.
142	<	* It never returns, but instead exits to the system
143	<	* with a value 1, to indicate the system did not start
144	<	* properly.
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 static void usage() {
148	<	System.out.println("USAGE: java FilterMain <name>");
149	<	System.out.println("WHERE <name>:");
150	<	System.out.println("      The unique identifier for the Filter in the system.");
151	<	System.exit(1);
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.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,
182	+	getClass().getName(),
183	+	REVISION);
184	+	}
185
103	–	//---CONSTRUCTORS---
104	–
105	–	//---PUBLIC METHODS---
106	–
186		//---PRIVATE METHODS---
187
188		//---ACCESSOR/MUTATOR METHODS---
189
190		//---ATTRIBUTES---
191
192	+	/**
193	+	* This holds a reference to the
194	+	* system logger that is being used.
195	+	*/
196	+	private Logger _logger;
197	+
198	+	/**
199	+	* A reference to the reference manager in use
200	+	*/
201	+	private ReferenceManager _refman = ReferenceManager.getInstance();
202	+
203		//---STATIC ATTRIBUTES---
204	+
205	+	/**
206	+	* The friendly name for this component, used by
207	+	* all related classes.
208	+	* This is set from the configuration.
209	+	*/
210	+	public static String NAME;
211
212		}

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