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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/filter/FilterMain.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filter/FilterMain.java (file contents):
Revision 1.2 by tdb, Tue Nov 21 22:34:04 2000 UTC vs.
Revision 1.24 by ajm, Fri Feb 23 17:11:09 2001 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	+	package uk.ac.ukc.iscream.filter;
3
4		//---IMPORTS---
5	+	import uk.ac.ukc.iscream.util.*;
6		import uk.ac.ukc.iscream.core.*;
7	+	import uk.ac.ukc.iscream.componentmanager.*;
8		import uk.ac.ukc.iscream.filter.*;
6	–	import org.omg.CORBA.*;
7	–	import org.omg.CosNaming.*;
8	–	import org.omg.PortableServer.*;
9
10		/**
11		* A Filter Startup Class
12	+	* A filter is an iscream component.
13		*
14		* @author  $Author$
15		* @version $Id$
16		*/
17	<	class FilterMain {
17	>	public class FilterMain implements Component {
18
19		//---FINAL ATTRIBUTES---
20
#	Line 24 | Line 25 | class FilterMain {
25
26		//---STATIC METHODS---
27
28	<	public static void main(String[] args) {
29	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
30	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
28	>	//---CONSTRUCTORS---
29	>
30	>	/**
31	>	* Constructs a Filter with the name given
32	>	*
33	>	* @param givenName the name
34	>	*/
35	>	public FilterMain(String givenName) {
36	>	NAME = givenName;
37	>	}
38	>
39	>	//---PUBLIC METHODS---
40	>
41	>	/**
42	>	* Starts the Filter component
43	>	*/
44	>	public void start() throws ComponentStartException {
45	>	// get references to key objects
46	>	_refman = ReferenceManager.getInstance();
47	>	_logger = ReferenceManager.getInstance().getLogger();
48
49	<	// get our name from the command line
50	<	String ourName = "";
51	<	if (args.length == 1) {
52	<	ourName = args[0];
49	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
50	>
51	>	// configuration variables we require
52	>	int UDPListenPort = 0;
53	>	int TCPListenPort = 0;
54	>	String parentFilterName = null;
55	>	int queueMonitorInterval = 0;
56	>
57	>	Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME);
58	>	if (config == null) {
59	>	throw new ComponentStartException("Unable to obtain configuration for component");
60		}
61		else {
62	<	usage();
62	>	try {
63	>	// get the configuration properties we need
64	>	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
65	>	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
66	>	parentFilterName = config.getProperty("Filter.parentFilter");
67	>	queueMonitorInterval = Integer.parseInt(config.getProperty("Queue.MonitorInterval"));
68	>	} catch (org.omg.CORBA.MARSHAL e) {
69	>	throw new ComponentStartException("Unable to obtain requried configuration property for component");
70	>	}
71		}
72
73	<	// can't have a real toString() :)
41	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
73	>	_logger.write(toString(), Logger.SYSINIT, "configured");
74
75	<	try {
76	<	ORB orb = ORB.init(args, null);
77	<
78	<	// something to hold objects
79	<	org.omg.CORBA.Object objRef = null;
80	<
81	<	// get the Root POA
82	<	objRef = orb.resolve_initial_references("RootPOA");
83	<	POA poa = POAHelper.narrow(objRef);
84	<
85	<	// get a hook to the name service
86	<	objRef = orb.resolve_initial_references("NameService");
87	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
88	<
89	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
90	<
91	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
92	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
93	<
94	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
95	<	Logger logger = LoggerHelper.narrow(objRef);
96	<
97	<	//objRef = ncRef.resolve(ncRef.to_name("iscream.FilterManager"));
98	<	//FilterManager filterManager = FilterManagerHelper.narrow(objRef);
99	<
100	<	logger.write(toString, Logger.SYSINIT, "coming up");
101	<
102	<
103	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
104	<	// **** Please ignore this block of code, it's just "copy/paste" :)
73	<
74	<	// get the config
75	<	Configuration myConfig = configManager.getConfiguration(ourName);
76	<
77	<	// read some config here
78	<	int port = 0;
79	<
80	<	// did we?
81	<	if (myConfig == null) {
82	<	System.out.println("Failed: is it there?, can you read it?");
83	<	System.exit(1);
84	<	} else {
85	<
86	<	// get the property
87	<	try {
88	<	//QUERY HERE.... ???
89	<	port = new Integer(myConfig.getProperty("Filter.listenPort")).intValue();
90	<	} catch (org.omg.CORBA.MARSHAL e) {
91	<	System.out.println("Caught org.omg.CORBA.MARSHAL, must be a null we got back");
92	<	System.exit(1);
93	<	}
94	<	}
95	<
96	<	logger.write(toString, Logger.SYSINIT, "configured");
97	<
98	<	// **** END COMMENT
99	<
100	<	// SETUP our Servant
101	<
102	<	// create the FilterServant
103	<	FilterServant filterServant = new FilterServant(logger, ourName);
104	<
105	<	// and advertise it to the naming context
106	<	objRef = poa.servant_to_reference(filterServant);
107	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
108	<
109	<	// END SETUP
110	<
111	<	/**************************************************************
112	<	Here would be an ideal place to start another thread to do
113	<	the listening part of the Filter. Ideally it should just be
114	<	created and then run(). It may be necessary to pass some of
115	<	the following parameters into the thread by the constructor.
116	<
117	<	Logger logger
118	<	- a reference to a Logger object
119	<	FilterManager filterManager
120	<	- a reference to the system filter manager
121	<	ConfigurationManager configManager
122	<	- a reference to the system configuration manager
123	<	Configuration myConfig
124	<	- a reference to the configuration object for this
125	<	filter instance
126	<	String ourName
127	<	- our "identifier" name
128	<
129	<	**************************************************************/
130	<
131	<	logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener");
132	<	//UDPReader udpReader = new UDPReader(port, logger);
133	<	//udpReader.start();
134	<	logger.write(toString, Logger.SYSINIT, "Filter UDP listener started");
135	<
136	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
137	<
138	<	// get a root (CHANGE to use FilterManager)
139	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Filter.root1"));
140	<	Filter root = FilterHelper.narrow(objRef);
141	<
142	<	// register ourselves
143	<
144	<	// **** END COMMENT
145	<
146	<	// TEST
147	<	root.receiveXML("test via Root1");
148	<
149	<	// start the POA off
150	<	poa.the_POAManager().activate();
151	<
152	<	logger.write(toString, Logger.SYSINIT, "started");
153	<
154	<	// now we are running, we just need to serve
155	<	// so we ask the orb to block for us until it has finished
156	<	orb.run();
157	<
158	<	} catch (Exception e) {
159	<	System.err.println("FILTER ERROR: " + e);
160	<	e.printStackTrace(System.out);
161	<	}
75	>	// get parent
76	>	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
77	>
78	>	// setup a queue
79	>	Queue queue = new Queue();
80	>	// startup a monitor on this queue, every minute
81	>	String queueName = NAME + " Filter";
82	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
83	>
84	>	// Start a filter thread
85	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
86	>	FilterThread filterThread = new FilterThread(queue, parentFilter);
87	>	filterThread.start();
88	>
89	>	// FilterServant start (for inbound child filter data)
90	>	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
91	>	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
92	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
93	>
94	>	// UDL Reader start (for inbound host data)
95	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
96	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
97	>	udpReader.start();
98	>
99	>	// TCP Reader start (for heartbeats)
100	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
101	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
102	>	tcpReader.start();
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.
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 Filter <name>");
118	<	System.out.println("WHERE <name>:");
119	<	System.out.println("      The unique identifier for the Filter in the system.");
120	<	System.exit(1);
116	>	public String toString() {
117	>	return FormatName.getName(
118	>	NAME,
119	>	getClass().getName(),
120	>	REVISION);
121		}
122
177	–	//---CONSTRUCTORS---
178	–
179	–	//---PUBLIC METHODS---
180	–
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;
134	+
135	+	/**
136	+	* A reference to the reference manager in use
137	+	*/
138	+	private ReferenceManager _refman;
139	+
140		//---STATIC ATTRIBUTES---
141
142	<	}
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	>	}

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