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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 1.4 by tdb, Thu Nov 30 02:42:56 2000 UTC vs.
Revision 1.27 by ajm, Mon Feb 26 02:15:11 2001 UTC

#	Line 1 | Line 1
1	+
2		//---PACKAGE DECLARATION---
3		package uk.ac.ukc.iscream.rootfilter;
4
5		//---IMPORTS---
5	–	import uk.ac.ukc.iscream.core.*;
6	–	import uk.ac.ukc.iscream.filter.*;
7	–	import org.omg.CORBA.*;
8	–	import org.omg.CosNaming.*;
9	–	import org.omg.PortableServer.*;
6		import uk.ac.ukc.iscream.util.*;
7	+	import uk.ac.ukc.iscream.core.*;
8	+	import uk.ac.ukc.iscream.componentmanager.*;
9	+	import uk.ac.ukc.iscream.clientinterface.*;
10
11		/**
12	<	* A RootFilter 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 23 | 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) {
34	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
35	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
33	>	//---CONSTRUCTORS---
34	>
35	>	//---PUBLIC METHODS---
36	>
37	>	/**
38	>	* This starts the Root Filter for the system
39	>	*/
40	>	public void start() throws ComponentStartException {
41	>	// get references to key objects
42	>	_refman = ReferenceManager.getInstance();
43	>	_logger = ReferenceManager.getInstance().getLogger();
44
45	<	// get our name from the command line
46	<	String ourName = "";
47	<	if (args.length == 1) {
48	<	ourName = args[0];
45	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
46	>
47	>	// configuration variables we require
48	>	String ourName = null;
49	>	String realInterface = null;
50	>	String dbInterface = null;
51	>	int queueMonitorInterval = 0;
52	>
53	>	Configuration config = _refman.getCM().getConfiguration("RootFilter");
54	>	if (config == null) {
55	>	throw new ComponentStartException("Unable to obtain configuration for component");
56		}
57		else {
58	<	usage();
58	>	try {
59	>	// get the configuration properties we need
60	>	ourName = config.getProperty("RootFilter.name");
61	>
62	>	queueMonitorInterval = Integer.parseInt(config.getProperty("Queue.MonitorInterval"));
63	>	} catch (org.omg.CORBA.MARSHAL e) {
64	>	throw new ComponentStartException("Unable to obtain requried configuration property for component");
65	>	}
66	>	try {
67	>	// get the optional configuration properties
68	>	realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
69	>	dbInterface = config.getProperty("RootFilter.dbInterfaceName");
70	>	} catch (org.omg.CORBA.MARSHAL e) {
71	>	// we can ignore that fact
72	>	}
73		}
74
75	<	// can't have a real toString() :)
76	<	String toString = "RootFilter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
75	>	// now we have the name of the Root Filter we set it
76	>	NAME = ourName;
77
78	<	try {
79	<	ORB orb = ORB.init(args, null);
80	<
81	<	// something to hold objects
82	<	org.omg.CORBA.Object objRef = null;
83	<
51	<	// get the Root POA
52	<	objRef = orb.resolve_initial_references("RootPOA");
53	<	POA poa = POAHelper.narrow(objRef);
54	<
55	<	// get a hook to the name service
56	<	objRef = orb.resolve_initial_references("NameService");
57	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
58	<
59	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
60	<
61	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
62	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
63	<
64	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
65	<	Logger logger = LoggerHelper.narrow(objRef);
66	<
67	<	//objRef = ncRef.resolve(ncRef.to_name("iscream.FilterManager"));
68	<	//FilterManager filterManager = FilterManagerHelper.narrow(objRef);
69	<
70	<	logger.write(toString, Logger.SYSINIT, "coming up");
71	<
72	<
73	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
74	<	// **** Please ignore this block of code, it's just "copy/paste" :)
75	<
76	<	// get the config
77	<	Configuration myConfig = configManager.getConfiguration(ourName);
78	<
79	<	logger.write(toString, Logger.SYSINIT, "configured");
80	<
81	<	// **** END COMMENT
82	<
83	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
84	<
85	<	// **** END COMMENT
86	<
87	<	logger.write(toString, Logger.SYSINIT, "starting RootFilter");
88	<
89	<	/**************************************************************
90	<	Here would be an ideal place to start another thread to do
91	<	the listening part of the Filter. Ideally it should just be
92	<	created and then run(). It may be necessary to pass some of
93	<	the following parameters into the thread by the constructor.
94	<
95	<	Logger logger
96	<	- a reference to a Logger object
97	<	FilterManager filterManager
98	<	- a reference to the system filter manager
99	<	ConfigurationManager configManager
100	<	- a reference to the system configuration manager
101	<	Configuration myConfig
102	<	- a reference to the configuration object for this
103	<	filter instance
104	<	String ourName
105	<	- our "identifier" name
106	<
107	<	**************************************************************/
108	<
109	<	// NOTE:
110	<	//   We will not need to bind to the ORB when the FilterManager
111	<	//   is running :)
112	<
113	<	// create the RootFilterServant
114	<	RootFilterServant rfServant = new RootFilterServant(logger, ourName);
115	<
116	<	// and advertise it to the naming context
117	<	objRef = poa.servant_to_reference(rfServant);
118	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
119	<
120	<	// start the POA off
121	<	poa.the_POAManager().activate();
122	<
123	<	logger.write(toString, Logger.SYSINIT, "started");
124	<
125	<	// now we are running, we just need to serve
126	<	// so we ask the orb to block for us until it has finished
127	<	orb.run();
128	<
129	<	} catch (Exception e) {
130	<	System.err.println("FILTER ERROR: " + e);
131	<	e.printStackTrace(System.out);
78	>	_logger.write(toString(), Logger.SYSINIT, "configured");
79	>
80	>	ClientInterface ciReal = null, ciDB = null;
81	>	// get reference to the client interfaces - the real time one
82	>	if (realInterface != null) {
83	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
84		}
85	+	// get reference to the client interfaces - and the db one
86	+	if (dbInterface != null) {
87	+	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
88	+	}
89	+
90	+	Queue queue = new Queue();
91	+	// startup a monitor on this queue, every minute
92	+	String queueName = NAME + " RootFilter";
93	+	queue.startMonitor(queueMonitorInterval*1000, queueName);
94	+
95	+	if (realInterface == null) {
96	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
97	+	CIWrapper c = new CIWrapper(ciDB, queue);
98	+	c.start();
99	+	} else if (dbInterface == null) {
100	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
101	+	CIWrapper c = new CIWrapper(ciReal, queue);
102	+	c.start();
103	+	} else {
104	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
105	+	CIWrapper c = new CIWrapper(ciReal, queue);
106	+	c.start();
107	+	c = new CIWrapper(ciDB, queue);
108	+	c.start();
109	+	}
110	+
111	+	// RootFilterServant start (for inbound child filter data)
112	+	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
113	+	RootFilterServant filterServant = new RootFilterServant(queue);
114	+	// bind to the naming service as a filter
115	+	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
116	+
117	+	_logger.write(toString(), Logger.SYSINIT, "started");
118	+
119		}
120	<
121	<	/**
122	<	* A simple method to print the usage of this class.
123	<	* It never returns, but instead exits to the system
124	<	* with a value 1, to indicate the system did not start
125	<	* properly.
120	>
121	>	/**
122	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
123	>	* method to provide clean logging (every class should have this).
124	>	*
125	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
126	>	* to format the toString()
127	>	*
128	>	* @return the name of this class and its CVS revision
129		*/
130	<	public static void usage() {
131	<	System.out.println("USAGE: java RootFilter <name>");
132	<	System.out.println("WHERE <name>:");
133	<	System.out.println("      The unique identifier for the RootFilter in the system.");
134	<	System.exit(1);
130	>	public String toString() {
131	>	return FormatName.getName(
132	>	NAME,
133	>	getClass().getName(),
134	>	REVISION);
135		}
136
148	–	//---CONSTRUCTORS---
149	–
150	–	//---PUBLIC METHODS---
151	–
137		//---PRIVATE METHODS---
138
139		//---ACCESSOR/MUTATOR METHODS---
140
141		//---ATTRIBUTES---
142
143	+	/**
144	+	* This holds a reference to the
145	+	* system logger that is being used.
146	+	*/
147	+	private Logger _logger;
148	+
149	+	/**
150	+	* A reference to the reference manager in use
151	+	*/
152	+	private ReferenceManager _refman;
153	+
154		//---STATIC ATTRIBUTES---
155	+
156	+	/**
157	+	* The friendly name for this component, used by
158	+	* all related classes.
159	+	* This is set from the configuration.
160	+	*/
161	+	public static String NAME;
162
163	<	}
163	>	}

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