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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 1.21 by tdb, Fri Jan 19 01:20:15 2001 UTC

#	Line 4 | Line 4 | package uk.ac.ukc.iscream.rootfilter;
4		//---IMPORTS---
5		import uk.ac.ukc.iscream.util.*;
6		import uk.ac.ukc.iscream.core.*;
7	+	import uk.ac.ukc.iscream.componentmanager.*;
8		import uk.ac.ukc.iscream.clientinterface.*;
9
10		/**
11	<	* A Filter Startup Class
11	>	* The root filter is what all filters talk to
12	>	* Hosts cannot talk to this implementation of a filter.
13	>	* It provides hooks to all data interfaces for the system
14	>	* namely the client interface and the db interface.
15	>	* This is an i-scream component that starts the
16	>	* RootFilter services.
17		*
18		* @author  $Author$
19		* @version $Id$
20		*/
21	<	class RootFilterMain {
21	>	public class RootFilter implements Component {
22
23		//---FINAL ATTRIBUTES---
24
#	Line 20 | Line 26 | class RootFilterMain {
26		* The current CVS revision of this class
27		*/
28		public static final String REVISION = "$Revision$";
29	<
29	>
30		//---STATIC METHODS---
31
32	<	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	<	// ***************************************
32	>	//---CONSTRUCTORS---
33
34	<	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) + ")";
34	>	//---PUBLIC METHODS---
35
36	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
36	>	/**
37	>	* This starts the Root Filter for the system
38	>	*/
39	>	public void start() throws ComponentStartException {
40	>
41	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
42
43		// configuration variables we require
44		String ourName = null;
45		String realInterface = null;
46		String dbInterface = null;
47
48	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
48	>	Configuration config = _refman.getCM().getConfiguration("RootFilter");
49		if (config == null) {
50	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
51	<	"         Advise you check the i-scream log for more information.");
50	>	System.err.println("CRITICAL:Unable to obtain configuration" +
51	>	"\n         Advise you check the i-scream log for more information.");
52	>	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
53	>	System.exit(1);
54		} else {
55		try {
56		ourName = config.getProperty("RootFilter.name");
57		realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
58		dbInterface = config.getProperty("RootFilter.dbInterfaceName");
59		} catch (org.omg.CORBA.MARSHAL e) {
60	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
61	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
62	<	"         Advise you check the i-scream log for more information.");
63	<
60	>	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
61	>	"\n         Advise you check the i-scream log for more information.");
62	>	_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
63	>	System.exit(1);
64		}
65		}
66		// now we have the name of the Root Filter we set it
67	<	refman.setName(ourName);
68	<	toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
69	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
70	<
67	>	NAME = ourName;
68	>
69	>	_logger.write(toString(), Logger.SYSINIT, "configured");
70	>
71	>	ClientInterface ciReal = null, ciDB = null;
72		// get reference to the client interfaces - the real time one
73	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + realInterface));
74	<	// - the db one ... but it's not done yet
75	<	//ClientInterface ciDB = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + dbInterface));
76	<	// so for the time being we null it.
77	<	ClientInterface ciDB = null;
78	<	refman.getLogger().write(toString, Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
73	>	if (realInterface != null) {
74	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
75	>	}
76	>	// get reference to the client interfaces - and the db one
77	>	if (dbInterface != null) {
78	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
79	>	}
80
81	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
81	>	Queue queue = new Queue();
82
83	+	if (realInterface == null) {
84	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
85	+	CIWrapper c = new CIWrapper(ciDB, queue);
86	+	c.start();
87	+	} else if (dbInterface == null) {
88	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
89	+	CIWrapper c = new CIWrapper(ciReal, queue);
90	+	c.start();
91	+	} else {
92	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
93	+	CIWrapper c = new CIWrapper(ciReal, queue);
94	+	c.start();
95	+	c = new CIWrapper(ciDB, queue);
96	+	c.start();
97	+	}
98	+
99		// RootFilterServant start (for inbound child filter data)
100	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
101	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
100	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
101	>	RootFilterServant filterServant = new RootFilterServant(queue);
102		// bind to the naming service as a filter
103	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
103	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
104
105	<	// start the POA off
106	<	// now we are running, we just need to serve
107	<	// so we ask the orb to block for us until it has finished
108	<	refman.activatePOA();
109	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
110	<	refman.getORB().run();
105	>	_logger.write(toString(), Logger.SYSINIT, "started");
106	>
107	>	// !!!! TEMPORARY CODE !!!!
108	>	// Monitor the queue's status (queue 0 and 1 - big assumption!)
109	>	while(true) {
110	>	// wait 30 seconds
111	>	try { Thread.sleep(30000); } catch(Exception e) {}
112	>	try {
113	>	int q0 = queue.queueSize(0);
114	>	int q1 = queue.queueSize(1);
115	>	int tot = queue.elementCount();
116	>	String message = "Queue status - queue0: "+q0+" queue1: "+q1+" total: "+tot;
117	>	_logger.write(toString(), Logger.DEBUG, message);
118	>	}
119	>	catch(Exception e) {
120	>	_logger.write(toString(), Logger.ERROR, e.getMessage());
121	>	}
122	>	}
123		}
124	<
125	<	/**
126	<	* A simple method to print the usage of this class.
127	<	* It never returns, but instead exits to the system
128	<	* with a value 1, to indicate the system did not start
129	<	* properly.
124	>
125	>	/**
126	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
127	>	* method to provide clean logging (every class should have this).
128	>	*
129	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
130	>	* to format the toString()
131	>	*
132	>	* @return the name of this class and its CVS revision
133		*/
134	<	public static void usage() {
135	<	System.out.println("USAGE: java FilterMain <name>");
136	<	System.out.println("WHERE <name>:");
137	<	System.out.println("      The unique identifier for the Filter in the system.");
138	<	System.exit(1);
134	>	public String toString() {
135	>	return FormatName.getName(
136	>	NAME,
137	>	getClass().getName(),
138	>	REVISION);
139		}
140
103	–	//---CONSTRUCTORS---
104	–
105	–	//---PUBLIC METHODS---
106	–
141		//---PRIVATE METHODS---
142
143		//---ACCESSOR/MUTATOR METHODS---
144
145		//---ATTRIBUTES---
146
147	+	/**
148	+	* This holds a reference to the
149	+	* system logger that is being used.
150	+	*/
151	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
152	+
153	+	/**
154	+	* A reference to the reference manager in use
155	+	*/
156	+	private ReferenceManager _refman = ReferenceManager.getInstance();
157	+
158		//---STATIC ATTRIBUTES---
159	+
160	+	/**
161	+	* The friendly name for this component, used by
162	+	* all related classes.
163	+	* This is set from the configuration.
164	+	*/
165	+	public static String NAME;
166
167		}

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