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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 1.11 by ajm, Tue Dec 12 20:44:03 2000 UTC

#	Line 2 | Line 2
2		package uk.ac.ukc.iscream.rootfilter;
3
4		//---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.*;
5		import uk.ac.ukc.iscream.util.*;
6	+	import uk.ac.ukc.iscream.core.*;
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 23 | 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();
40	<	}
65	>	// now we have the name of the Root Filter we set it
66	>	NAME = ourName;
67
68	<	// can't have a real toString() :)
43	<	String toString = "RootFilter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
44	<
45	<	try {
46	<	ORB orb = ORB.init(args, null);
47	<
48	<	// something to hold objects
49	<	org.omg.CORBA.Object objRef = null;
50	<
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);
68	>	_logger.write(toString(), Logger.SYSINIT, "configured");
69
70	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
71	<
72	<	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);
70	>	// get reference to the client interfaces - the real time one
71	>	if (realInterface != null) {
72	>	ClientInterface ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
73		}
74	<	}
74	>	// get reference to the client interfaces - and the db one
75	>	if (dbInterface != null) {
76	>	ClientInterface ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
77	>	}
78
79	<	/**
80	<	* A simple method to print the usage of this class.
81	<	* It never returns, but instead exits to the system
82	<	* with a value 1, to indicate the system did not start
83	<	* properly.
79	>	ClientInterface[] clientInterfaces;
80	>	if (realInterface == null) {
81	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
82	>	clientInterfaces = {ciReal, ciDB};
83	>	} else if (dbInterface == null) {
84	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
85	>	clientInterfaces = {ciReal};
86	>	} else {
87	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
88	>	clientInterfaces = {ciReal, ciDB};
89	>	}
90	>
91	>	// RootFilterServant start (for inbound child filter data)
92	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
93	>	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
94	>	// bind to the naming service as a filter
95	>	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
96	>
97	>	_logger.write(toString(), Logger.SYSINIT, "started");
98	>	}
99	>
100	>	/**
101	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
102	>	* method to provide clean logging (every class should have this).
103	>	*
104	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
105	>	* to format the toString()
106	>	*
107	>	* @return the name of this class and its CVS revision
108		*/
109	<	public static void usage() {
110	<	System.out.println("USAGE: java RootFilter <name>");
111	<	System.out.println("WHERE <name>:");
112	<	System.out.println("      The unique identifier for the RootFilter in the system.");
113	<	System.exit(1);
109	>	public String toString() {
110	>	return FormatName.getName(
111	>	_name,
112	>	getClass().getName(),
113	>	REVISION);
114		}
115
148	–	//---CONSTRUCTORS---
149	–
150	–	//---PUBLIC METHODS---
151	–
116		//---PRIVATE METHODS---
117
118		//---ACCESSOR/MUTATOR METHODS---
119
120		//---ATTRIBUTES---
121
122	+	/**
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	+	/**
134	+	* This holds a reference to the
135	+	* system logger that is being used.
136	+	*/
137	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
138	+
139	+	/**
140	+	* A reference to the reference manager in use
141	+	*/
142	+	private ReferenceManager _refman = ReferenceManager.getInstance();
143	+
144		//---STATIC ATTRIBUTES---
145	+
146	+	/**
147	+	* The friendly name for this component, used by
148	+	* all related classes.
149	+	* This is set from the configuration.
150	+	*/
151	+	public static String NAME;
152
153	<	}
153	>	}

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