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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 1.3 by tdb, Tue Nov 21 23:14:00 2000 UTC vs.
Revision 1.18 by tdb, Fri Jan 12 00:45:25 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.filter.*;
6	–	import org.omg.CORBA.*;
7	–	import org.omg.CosNaming.*;
8	–	import org.omg.PortableServer.*;
8
9		/**
10		* A Filter Startup Class
11	+	* A filter is an iscream component.
12		*
13		* @author  $Author$
14		* @version $Id$
15		*/
16	<	class FilterMain {
16	>	public class FilterMain implements uk.ac.ukc.iscream.util.Component {
17
18		//---FINAL ATTRIBUTES---
19
#	Line 24 | Line 24 | class FilterMain {
24
25		//---STATIC METHODS---
26
27	<	public static void main(String[] args) {
28	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
29	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
30	<
31	<	// get our name from the command line
32	<	String ourName = "";
33	<	if (args.length == 1) {
34	<	ourName = args[0];
35	<	}
36	<	else {
37	<	usage();
38	<	}
39	<
40	<	// can't have a real toString() :)
41	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
42	<
43	<	try {
44	<	ORB orb = ORB.init(args, null);
27	>	//---CONSTRUCTORS---
28	>
29	>	/**
30	>	* Constructs a Filter with the name given
31	>	*
32	>	* @param givenName the name
33	>	*/
34	>	public FilterMain(String givenName) {
35	>	NAME = givenName;
36	>	}
37	>
38	>	//---PUBLIC METHODS---
39	>
40	>	/**
41	>	* Starts the Filter component
42	>	*/
43	>	public void start() throws ComponentStartException {
44	>
45	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
46
47	<	// something to hold objects
48	<	org.omg.CORBA.Object objRef = null;
49	<
50	<	// get the Root POA
51	<	objRef = orb.resolve_initial_references("RootPOA");
52	<	POA poa = POAHelper.narrow(objRef);
53	<
54	<	// get a hook to the name service
55	<	objRef = orb.resolve_initial_references("NameService");
56	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
57	<
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"));
66	<	//FilterManager filterManager = FilterManagerHelper.narrow(objRef);
67	<
68	<	logger.write(toString, Logger.SYSINIT, "coming up");
69	<
70	<
71	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
72	<	// **** 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?");
47	>	// configuration variables we require
48	>	int UDPListenPort = 0;
49	>	int TCPListenPort = 0;
50	>	String parentFilterName = null;
51	>
52	>	Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME);
53	>	if (config == null) {
54	>	System.err.println("CRITICAL:Unable to obtain configuration" +
55	>	"\n         Advise you check the i-scream log for more information.");
56	>	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
57	>	System.exit(1);
58	>	} else {
59	>	try {
60	>	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
61	>	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
62	>	parentFilterName = config.getProperty("Filter.parentFilter");
63	>	} catch (org.omg.CORBA.MARSHAL e) {
64	>	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
65	>	"\n         Advise you check the i-scream log for more information.");
66	>	_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
67		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	–	}
68		}
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("This is just a debugging test, we ("+ourName+") are live on port: "+port);
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);
69		}
70	+	_logger.write(toString(), Logger.SYSINIT, "configured");
71	+
72	+	// get parent
73	+	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
74	+
75	+	// setup a queue
76	+	Queue queue = new Queue();
77	+
78	+	// Start a filter thread
79	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
80	+	FilterThread filterThread = new FilterThread(queue, parentFilter);
81	+	filterThread.start();
82	+
83	+	// FilterServant start (for inbound child filter data)
84	+	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
85	+	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
86	+	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
87	+
88	+	// UDL Reader start (for inbound host data)
89	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
90	+	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
91	+	udpReader.start();
92	+
93	+	// TCP Reader start (for heartbeats)
94	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
95	+	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
96	+	tcpReader.start();
97	+
98	+	_logger.write(toString(), Logger.SYSINIT, "started");
99		}
100
101	<	/**
102	<	* A simple method to print the usage of this class.
103	<	* It never returns, but instead exits to the system
104	<	* with a value 1, to indicate the system did not start
105	<	* properly.
101	>	/**
102	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
103	>	* method to provide clean logging (every class should have this).
104	>	*
105	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
106	>	* to format the toString()
107	>	*
108	>	* @return the name of this class and its CVS revision
109		*/
110	<	public static void usage() {
111	<	System.out.println("USAGE: java Filter <name>");
112	<	System.out.println("WHERE <name>:");
113	<	System.out.println("      The unique identifier for the Filter in the system.");
114	<	System.exit(1);
110	>	public String toString() {
111	>	return FormatName.getName(
112	>	NAME,
113	>	getClass().getName(),
114	>	REVISION);
115		}
116
177	–	//---CONSTRUCTORS---
178	–
179	–	//---PUBLIC METHODS---
180	–
117		//---PRIVATE METHODS---
118
119		//---ACCESSOR/MUTATOR METHODS---
120
121		//---ATTRIBUTES---
122
123	+	/**
124	+	* This holds a reference to the
125	+	* system logger that is being used.
126	+	*/
127	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
128	+
129	+	/**
130	+	* A reference to the reference manager in use
131	+	*/
132	+	private ReferenceManager _refman = ReferenceManager.getInstance();
133	+
134		//---STATIC ATTRIBUTES---
135	+
136	+	/**
137	+	* The friendly name for this component, used by
138	+	* all related classes.
139	+	* This is set from the configuration.
140	+	*/
141	+	public static String NAME;
142
143	<	}
143	>	}

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