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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 1.33 by tdb, Fri Mar 16 15:16:01 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.*;
10	<	import uk.ac.ukc.iscream.util.*;
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 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	>	_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	<	try {
79	<	ORB orb = ORB.init(args, null);
78	>	// setup a queue
79	>	Queue queue;
80	>	// see if this Queue needs a size limit
81	>	try {
82	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
83	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
84	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
85	>	if(algorithm != -1) {
86	>	queue = new Queue(queueSizeLimit, algorithm);
87	>	}
88	>	else {
89	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
90	>	// just don't activate a limit
91	>	queue = new Queue();
92	>	}
93
94	<	// something to hold objects
95	<	org.omg.CORBA.Object objRef = null;
96	<
97	<	// get the Root POA
98	<	objRef = orb.resolve_initial_references("RootPOA");
99	<	POA poa = POAHelper.narrow(objRef);
100	<
101	<	// get a hook to the name service
102	<	objRef = orb.resolve_initial_references("NameService");
103	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
94	>	} catch (PropertyNotFoundException e) {
95	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
96	>	// just don't activate a limit
97	>	queue = new Queue();
98	>	} catch (NumberFormatException e) {
99	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
100	>	// just don't activate a limit
101	>	queue = new Queue();
102	>	}
103	>
104	>	// startup a monitor on this queue
105	>	try {
106	>	// try to get the interval, if this fails, we won't start up the monitor
107	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
108	>	String queueName = NAME + " RootFilter";
109	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
110	>	} catch (PropertyNotFoundException e) {
111	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
112	>	}
113	>
114	>	if (realInterface == null) {
115	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
116	>	CIWrapper c = new CIWrapper(ciDB, queue);
117	>	c.start();
118	>	} else if (dbInterface == null) {
119	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
120	>	CIWrapper c = new CIWrapper(ciReal, queue);
121	>	c.start();
122	>	} else {
123	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
124	>	CIWrapper c = new CIWrapper(ciReal, queue);
125	>	c.start();
126	>	c = new CIWrapper(ciDB, queue);
127	>	c.start();
128	>	}
129
130	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
131	<
132	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
133	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
134	<
135	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
136	<	Logger logger = LoggerHelper.narrow(objRef);
137	<
138	<	//objRef = ncRef.resolve(ncRef.to_name("iscream.FilterManager"));
139	<	//FilterManager filterManager = FilterManagerHelper.narrow(objRef);
140	<
141	<	logger.write(toString, Logger.SYSINIT, "coming up");
142	<
143	<
144	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
145	<	// **** Please ignore this block of code, it's just "copy/paste" :)
146	<
147	<	// get the config
148	<	Configuration myConfig = configManager.getConfiguration(ourName);
149	<
150	<	logger.write(toString, Logger.SYSINIT, "configured");
151	<
152	<	// **** END COMMENT
153	<
154	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
155	<
156	<	// **** END COMMENT
157	<
158	<	logger.write(toString, Logger.SYSINIT, "starting RootFilter");
159	<
160	<	/**************************************************************
161	<	Here would be an ideal place to start another thread to do
162	<	the listening part of the Filter. Ideally it should just be
163	<	created and then run(). It may be necessary to pass some of
164	<	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);
130	>	// RootFilterServant start (for inbound child filter data)
131	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
132	>	RootFilterServant filterServant = new RootFilterServant(queue);
133	>	// bind to the naming service as a filter
134	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
135	>
136	>	_logger.write(toString(), Logger.SYSINIT, "started");
137	>
138	>	}
139	>
140	>	/**
141	>	* Does a dependency check. Used mainly at startup to
142	>	* see if the required dependencies (components) are up
143	>	* and running.
144	>	*
145	>	* @return a boolean value, true if the depdencies are satisfied
146	>	*/
147	>	public boolean depCheck() {
148	>	try {
149	>	org.omg.CORBA.Object obj;
150	>	// first check the ConfigurationManager is alive
151	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
152	>	// then get some info on the CLI and DBI
153	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
154	>	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
155	>	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
156	>	// finally check the CLI and DBI are alive
157	>	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
158	>	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
159	>	} catch(ComponentCORBAException e) {
160	>	System.err.println(toString() + ": Dependency Failure: "+e);
161	>	return false;
162	>	} catch(PropertyNotFoundException e) {
163	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
164	>	return false;
165		}
166	+	// dependency check suceeded
167	+	return true;
168		}
169	<
170	<	/**
171	<	* A simple method to print the usage of this class.
172	<	* It never returns, but instead exits to the system
173	<	* with a value 1, to indicate the system did not start
174	<	* properly.
169	>
170	>	/**
171	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
172	>	* method to provide clean logging (every class should have this).
173	>	*
174	>	* This uses the uk.org.iscream.util.NameFormat class
175	>	* to format the toString()
176	>	*
177	>	* @return the name of this class and its CVS revision
178		*/
179	<	public static void usage() {
180	<	System.out.println("USAGE: java RootFilter <name>");
181	<	System.out.println("WHERE <name>:");
182	<	System.out.println("      The unique identifier for the RootFilter in the system.");
183	<	System.exit(1);
179	>	public String toString() {
180	>	return FormatName.getName(
181	>	NAME,
182	>	getClass().getName(),
183	>	REVISION);
184		}
185
148	–	//---CONSTRUCTORS---
149	–
150	–	//---PUBLIC METHODS---
151	–
186		//---PRIVATE METHODS---
187
188		//---ACCESSOR/MUTATOR METHODS---
189
190		//---ATTRIBUTES---
191
192	+	/**
193	+	* This holds a reference to the
194	+	* system logger that is being used.
195	+	*/
196	+	private Logger _logger;
197	+
198	+	/**
199	+	* A reference to the reference manager in use
200	+	*/
201	+	private ReferenceManager _refman = ReferenceManager.getInstance();
202	+
203		//---STATIC ATTRIBUTES---
204	+
205	+	/**
206	+	* The friendly name for this component, used by
207	+	* all related classes.
208	+	* This is set from the configuration.
209	+	*/
210	+	public static String NAME;
211
212	<	}
212	>	}

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