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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 1.32 by tdb, Wed Mar 14 23:25:29 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.core.*;
7	<	import uk.ac.ukc.iscream.filter.*;
8	<	import org.omg.CORBA.*;
9	<	import org.omg.CosNaming.*;
9	<	import org.omg.PortableServer.*;
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 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 22 | 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	>	_logger = _refman.getLogger();
43
44	<	// get our name from the command line
45	<	String ourName = "";
46	<	if (args.length == 1) {
47	<	ourName = args[0];
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	<	else {
57	<	usage();
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	<	// can't have a real toString() :)
69	<	String toString = "RootFilter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
68	>	ClientInterface ciReal = null, ciDB = null;
69	>	// get reference to the client interfaces - the real time one
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	>	// setup a queue
79	>	Queue queue = new Queue();
80
81	<	try {
82	<	ORB orb = ORB.init(args, null);
83	<
84	<	// something to hold objects
85	<	org.omg.CORBA.Object objRef = null;
86	<
87	<	// get the Root POA
88	<	objRef = orb.resolve_initial_references("RootPOA");
89	<	POA poa = POAHelper.narrow(objRef);
90	<
91	<	// get a hook to the name service
92	<	objRef = orb.resolve_initial_references("NameService");
93	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
81	>	// startup a monitor on this queue
82	>	try {
83	>	// try to get the interval, if this fails, we won't start up the monitor
84	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
85	>	String queueName = NAME + " RootFilter";
86	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
87	>	} catch (PropertyNotFoundException e) {
88	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
89	>	}
90	>
91	>	if (realInterface == null) {
92	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
93	>	CIWrapper c = new CIWrapper(ciDB, queue);
94	>	c.start();
95	>	} else if (dbInterface == null) {
96	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
97	>	CIWrapper c = new CIWrapper(ciReal, queue);
98	>	c.start();
99	>	} else {
100	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
101	>	CIWrapper c = new CIWrapper(ciReal, queue);
102	>	c.start();
103	>	c = new CIWrapper(ciDB, queue);
104	>	c.start();
105	>	}
106
107	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
108	<
109	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
110	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
111	<
112	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
113	<	Logger logger = LoggerHelper.narrow(objRef);
114	<
115	<	//objRef = ncRef.resolve(ncRef.to_name("iscream.FilterManager"));
116	<	//FilterManager filterManager = FilterManagerHelper.narrow(objRef);
117	<
118	<	logger.write(toString, Logger.SYSINIT, "coming up");
119	<
120	<
121	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
122	<	// **** Please ignore this block of code, it's just "copy/paste" :)
123	<
124	<	// get the config
125	<	Configuration myConfig = configManager.getConfiguration(ourName);
126	<
127	<	logger.write(toString, Logger.SYSINIT, "configured");
128	<
129	<	// **** END COMMENT
130	<
131	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
132	<
133	<	// **** END COMMENT
134	<
135	<	logger.write(toString, Logger.SYSINIT, "starting RootFilter");
136	<
137	<	/**************************************************************
138	<	Here would be an ideal place to start another thread to do
139	<	the listening part of the Filter. Ideally it should just be
140	<	created and then run(). It may be necessary to pass some of
141	<	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);
107	>	// RootFilterServant start (for inbound child filter data)
108	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
109	>	RootFilterServant filterServant = new RootFilterServant(queue);
110	>	// bind to the naming service as a filter
111	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
112	>
113	>	_logger.write(toString(), Logger.SYSINIT, "started");
114	>
115	>	}
116	>
117	>	/**
118	>	* Does a dependency check. Used mainly at startup to
119	>	* see if the required dependencies (components) are up
120	>	* and running.
121	>	*
122	>	* @return a boolean value, true if the depdencies are satisfied
123	>	*/
124	>	public boolean depCheck() {
125	>	try {
126	>	org.omg.CORBA.Object obj;
127	>	// first check the ConfigurationManager is alive
128	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
129	>	// then get some info on the CLI and DBI
130	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
131	>	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
132	>	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
133	>	// finally check the CLI and DBI are alive
134	>	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
135	>	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
136	>	} catch(ComponentCORBAException e) {
137	>	System.err.println(toString() + ": Dependency Failure: "+e);
138	>	return false;
139	>	} catch(PropertyNotFoundException e) {
140	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
141	>	return false;
142		}
143	+	// dependency check suceeded
144	+	return true;
145		}
146	<
147	<	/**
148	<	* A simple method to print the usage of this class.
149	<	* It never returns, but instead exits to the system
150	<	* with a value 1, to indicate the system did not start
151	<	* properly.
146	>
147	>	/**
148	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
149	>	* method to provide clean logging (every class should have this).
150	>	*
151	>	* This uses the uk.org.iscream.util.NameFormat class
152	>	* to format the toString()
153	>	*
154	>	* @return the name of this class and its CVS revision
155		*/
156	<	public static void usage() {
157	<	System.out.println("USAGE: java RootFilter <name>");
158	<	System.out.println("WHERE <name>:");
159	<	System.out.println("      The unique identifier for the RootFilter in the system.");
160	<	System.exit(1);
156	>	public String toString() {
157	>	return FormatName.getName(
158	>	NAME,
159	>	getClass().getName(),
160	>	REVISION);
161		}
162
147	–	//---CONSTRUCTORS---
148	–
149	–	//---PUBLIC METHODS---
150	–
163		//---PRIVATE METHODS---
164
165		//---ACCESSOR/MUTATOR METHODS---
166
167		//---ATTRIBUTES---
168
169	+	/**
170	+	* This holds a reference to the
171	+	* system logger that is being used.
172	+	*/
173	+	private Logger _logger;
174	+
175	+	/**
176	+	* A reference to the reference manager in use
177	+	*/
178	+	private ReferenceManager _refman = ReferenceManager.getInstance();
179	+
180		//---STATIC ATTRIBUTES---
181	+
182	+	/**
183	+	* The friendly name for this component, used by
184	+	* all related classes.
185	+	* This is set from the configuration.
186	+	*/
187	+	public static String NAME;
188
189	<	}
189	>	}

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