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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 1.3 by tdb, Wed Nov 29 19:33:35 2000 UTC vs.
Revision 1.15 by tdb, Tue Jan 2 03:19:37 2001 UTC

#	Line 2 | Line 2
2		package uk.ac.ukc.iscream.rootfilter;
3
4		//---IMPORTS---
5	+	import uk.ac.ukc.iscream.util.*;
6		import uk.ac.ukc.iscream.core.*;
7	<	import uk.ac.ukc.iscream.filter.*;
7	<	import org.omg.CORBA.*;
8	<	import org.omg.CosNaming.*;
9	<	import org.omg.PortableServer.*;
7	>	import uk.ac.ukc.iscream.clientinterface.*;
8
9		/**
10	<	* A RootFilter Startup Class
10	>	* The root filter is what all filters talk to
11	>	* Hosts cannot talk to this implementation of a filter.
12	>	* It provides hooks to all data interfaces for the system
13	>	* namely the client interface and the db interface.
14	>	* This is an i-scream component that starts the
15	>	* RootFilter services.
16		*
17		* @author  $Author$
18		* @version $Id$
19		*/
20	<	class RootFilterMain {
20	>	public class RootFilter implements uk.ac.ukc.iscream.util.Component {
21
22		//---FINAL ATTRIBUTES---
23
#	Line 22 | Line 25 | class RootFilterMain {
25		* The current CVS revision of this class
26		*/
27		public static final String REVISION = "$Revision$";
28	<
28	>
29		//---STATIC METHODS---
30
31	<	public static void main(String[] args) {
32	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
33	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
31	>	//---CONSTRUCTORS---
32	>
33	>	//---PUBLIC METHODS---
34	>
35	>	/**
36	>	* This starts the Root Filter for the system
37	>	*/
38	>	public void start() throws ComponentStartException {
39	>
40	>	_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;
46
47	<	// get our name from the command line
48	<	String ourName = "";
49	<	if (args.length == 1) {
50	<	ourName = args[0];
47	>	Configuration config = _refman.getCM().getConfiguration("RootFilter");
48	>	if (config == null) {
49	>	System.err.println("CRITICAL:Unable to obtain configuration" +
50	>	"\n         Advise you check the i-scream log for more information.");
51	>	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
52	>	System.exit(1);
53	>	} else {
54	>	try {
55	>	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	>	}
64		}
65	<	else {
66	<	usage();
65	>	// now we have the name of the Root Filter we set it
66	>	NAME = ourName;
67	>
68	>	_logger.write(toString(), Logger.SYSINIT, "configured");
69	>
70	>	ClientInterface ciReal = null, ciDB = null;
71	>	// get reference to the client interfaces - the real time one
72	>	if (realInterface != null) {
73	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
74		}
75	+	// get reference to the client interfaces - and the db one
76	+	if (dbInterface != null) {
77	+	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
78	+	}
79
80	<	// can't have a real toString() :)
42	<	String toString = "RootFilter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
80	>	Queue queue = new Queue();
81
82	<	try {
83	<	ORB orb = ORB.init(args, null);
84	<
85	<	// something to hold objects
86	<	org.omg.CORBA.Object objRef = null;
87	<
88	<	// get the Root POA
89	<	objRef = orb.resolve_initial_references("RootPOA");
90	<	POA poa = POAHelper.narrow(objRef);
91	<
92	<	// get a hook to the name service
93	<	objRef = orb.resolve_initial_references("NameService");
94	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
95	<
58	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
59	<
60	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
61	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
62	<
63	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
64	<	Logger logger = LoggerHelper.narrow(objRef);
65	<
66	<	//objRef = ncRef.resolve(ncRef.to_name("iscream.FilterManager"));
67	<	//FilterManager filterManager = FilterManagerHelper.narrow(objRef);
68	<
69	<	logger.write(toString, Logger.SYSINIT, "coming up");
70	<
71	<
72	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
73	<	// **** Please ignore this block of code, it's just "copy/paste" :)
74	<
75	<	// get the config
76	<	Configuration myConfig = configManager.getConfiguration(ourName);
77	<
78	<	logger.write(toString, Logger.SYSINIT, "configured");
79	<
80	<	// **** END COMMENT
81	<
82	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
83	<
84	<	// **** END COMMENT
85	<
86	<	logger.write(toString, Logger.SYSINIT, "starting RootFilter");
87	<
88	<	/**************************************************************
89	<	Here would be an ideal place to start another thread to do
90	<	the listening part of the Filter. Ideally it should just be
91	<	created and then run(). It may be necessary to pass some of
92	<	the following parameters into the thread by the constructor.
93	<
94	<	Logger logger
95	<	- a reference to a Logger object
96	<	FilterManager filterManager
97	<	- a reference to the system filter manager
98	<	ConfigurationManager configManager
99	<	- a reference to the system configuration manager
100	<	Configuration myConfig
101	<	- a reference to the configuration object for this
102	<	filter instance
103	<	String ourName
104	<	- our "identifier" name
105	<
106	<	**************************************************************/
107	<
108	<	// NOTE:
109	<	//   We will not need to bind to the ORB when the FilterManager
110	<	//   is running :)
111	<
112	<	// create the RootFilterServant
113	<	RootFilterServant rfServant = new RootFilterServant(logger, ourName);
114	<
115	<	// and advertise it to the naming context
116	<	objRef = poa.servant_to_reference(rfServant);
117	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
118	<
119	<	// start the POA off
120	<	poa.the_POAManager().activate();
121	<
122	<	logger.write(toString, Logger.SYSINIT, "started");
123	<
124	<	// now we are running, we just need to serve
125	<	// so we ask the orb to block for us until it has finished
126	<	orb.run();
127	<
128	<	} catch (Exception e) {
129	<	System.err.println("FILTER ERROR: " + e);
130	<	e.printStackTrace(System.out);
82	>	if (realInterface == null) {
83	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
84	>	CIWrapper c = new CIWrapper(ciDB, queue);
85	>	c.start();
86	>	} else if (dbInterface == null) {
87	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
88	>	CIWrapper c = new CIWrapper(ciReal, queue);
89	>	c.start();
90	>	} else {
91	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
92	>	CIWrapper c = new CIWrapper(ciReal, queue);
93	>	c.start();
94	>	c = new CIWrapper(ciDB, queue);
95	>	c.start();
96		}
97	+
98	+	// RootFilterServant start (for inbound child filter data)
99	+	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
100	+	RootFilterServant filterServant = new RootFilterServant(queue);
101	+	// bind to the naming service as a filter
102	+	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
103	+
104	+	_logger.write(toString(), Logger.SYSINIT, "started");
105		}
106	<
107	<	/**
108	<	* A simple method to print the usage of this class.
109	<	* It never returns, but instead exits to the system
110	<	* with a value 1, to indicate the system did not start
111	<	* properly.
106	>
107	>	/**
108	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
109	>	* method to provide clean logging (every class should have this).
110	>	*
111	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
112	>	* to format the toString()
113	>	*
114	>	* @return the name of this class and its CVS revision
115		*/
116	<	public static void usage() {
117	<	System.out.println("USAGE: java RootFilter <name>");
118	<	System.out.println("WHERE <name>:");
119	<	System.out.println("      The unique identifier for the RootFilter in the system.");
120	<	System.exit(1);
116	>	public String toString() {
117	>	return FormatName.getName(
118	>	NAME,
119	>	getClass().getName(),
120	>	REVISION);
121		}
122
147	–	//---CONSTRUCTORS---
148	–
149	–	//---PUBLIC METHODS---
150	–
123		//---PRIVATE METHODS---
124
125		//---ACCESSOR/MUTATOR METHODS---
126
127		//---ATTRIBUTES---
128
129	+	/**
130	+	* This holds a reference to the
131	+	* system logger that is being used.
132	+	*/
133	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
134	+
135	+	/**
136	+	* A reference to the reference manager in use
137	+	*/
138	+	private ReferenceManager _refman = ReferenceManager.getInstance();
139	+
140		//---STATIC ATTRIBUTES---
141	+
142	+	/**
143	+	* The friendly name for this component, used by
144	+	* all related classes.
145	+	* This is set from the configuration.
146	+	*/
147	+	public static String NAME;
148
149	<	}
149	>	}

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