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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 1.12 by ajm, Wed Nov 29 21:27:39 2000 UTC vs.
Revision 1.19 by tdb, Thu Jan 18 23:17:58 2001 UTC

#	Line 2 | Line 2
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.*;
7	–	import org.omg.CORBA.*;
8	–	import org.omg.CosNaming.*;
9	–	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 25 | 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");
31	<
32	<	// get our name from the command line
33	<	String ourName = "";
34	<	if (args.length == 1) {
35	<	ourName = args[0];
36	<	}
37	<	else {
38	<	usage();
39	<	}
40	<
41	<	// can't have a real toString() :)
42	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
43	<
44	<	try {
45	<	ORB orb = ORB.init(args, null);
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	<	logger.write(toString, Logger.SYSINIT, "coming up");
67	<
68	<
69	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
70	<	// **** Please ignore this block of code, it's just "copy/paste" :)
71	<
72	<	// get the config
73	<	Configuration myConfig = configManager.getConfiguration(ourName);
74	<
75	<	// read some config here
76	<	int UDPport = 0;
77	<	int TCPport = 0;
78	<	String parentFilterName = null;
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	<	UDPport = new Integer(myConfig.getProperty("Filter.UDPlistenPort")).intValue();
90	<	TCPport = new Integer(myConfig.getProperty("Filter.TCPlistenPort")).intValue();
91	<	parentFilterName = myConfig.getProperty("Filter.parentFilter");
92	<	} catch (org.omg.CORBA.MARSHAL e) {
93	<	System.out.println("Caught org.omg.CORBA.MARSHAL, must be a null we got back");
94	<	//System.exit(1);
95	<	}
96	<	}
97	<
98	<	logger.write(toString, Logger.SYSINIT, "configured");
99	<
100	<	// **** END COMMENT
101	<
102	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
103	<
104	<	// get a root (CHANGE to use FilterManager)
105	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Filter." + parentFilterName));
106	<	Filter parentFilter = FilterHelper.narrow(objRef);
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	<	// SETUP our Servant
109	<
110	<	// create the FilterServant
111	<	logger.write(toString, Logger.DEBUG, "firing servant with parent - " + parentFilterName);
112	<	FilterServant filterServant = new FilterServant(logger, parentFilter, ourName, new Integer(TCPport).toString() , new Integer(UDPport).toString());
39	>	//---PUBLIC METHODS---
40
41	<	// register ourselves
42	<
43	<	// and advertise it to the naming context
44	<	objRef = poa.servant_to_reference(filterServant);
45	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
46	<
120	<	// **** END COMMENT
41	>	/**
42	>	* Starts the Filter component
43	>	*/
44	>	public void start() throws ComponentStartException {
45	>
46	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
47
48	<	// END SETUP
49	<
48	>	// configuration variables we require
49	>	int UDPListenPort = 0;
50	>	int TCPListenPort = 0;
51	>	String parentFilterName = null;
52
53	<	/**************************************************************
54	<	Here would be an ideal place to start another thread to do
55	<	the listening part of the Filter. Ideally it should just be
56	<	created and then run(). It may be necessary to pass some of
57	<	the following parameters into the thread by the constructor.
58	<
59	<	Logger logger
60	<	- a reference to a Logger object
61	<	FilterManager filterManager
62	<	- a reference to the system filter manager
63	<	ConfigurationManager configManager
64	<	- a reference to the system configuration manager
65	<	Configuration myConfig
66	<	- a reference to the configuration object for this
67	<	filter instance
68	<	String ourName
69	<	- our "identifier" name
70	<
71	<	**************************************************************/
72	<
73	<	logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener");
74	<	UDPReader udpReader = new UDPReader(UDPport, parentFilter, logger);
75	<	udpReader.start();
76	<	logger.write(toString, Logger.SYSINIT, "Filter UDP listener started");
53	>	Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME);
54	>	if (config == null) {
55	>	System.err.println("CRITICAL:Unable to obtain configuration" +
56	>	"\n         Advise you check the i-scream log for more information.");
57	>	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
58	>	System.exit(1);
59	>	} else {
60	>	try {
61	>	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
62	>	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
63	>	parentFilterName = config.getProperty("Filter.parentFilter");
64	>	} catch (org.omg.CORBA.MARSHAL e) {
65	>	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
66	>	"\n         Advise you check the i-scream log for more information.");
67	>	_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
68	>	System.exit(1);
69	>	}
70	>	}
71	>	_logger.write(toString(), Logger.SYSINIT, "configured");
72	>
73	>	// get parent
74	>	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
75	>
76	>	// setup a queue
77	>	Queue queue = new Queue();
78	>
79	>	// Start a filter thread
80	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
81	>	FilterThread filterThread = new FilterThread(queue, parentFilter);
82	>	filterThread.start();
83	>
84	>	// FilterServant start (for inbound child filter data)
85	>	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
86	>	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
87	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
88
89	<	logger.write(toString, Logger.SYSINIT, "starting Filter TCP listener");
90	<	TCPReader tcpReader = new TCPReader(logger, configManager, TCPport, parentFilter);
91	<	tcpReader.start();
92	<	logger.write(toString, Logger.SYSINIT, "Filter TCP listener started");
89	>	// UDL Reader start (for inbound host data)
90	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
91	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
92	>	udpReader.start();
93
94	<	// TEST
95	<	//parentFilter.receiveXML("<?xml version=\"1.0\" encoding=\"ISO8859-1\"?><packet><test>This is just a debugging test, we ("+ourName+") are live on UDPport: "+UDPport+"</test></packet>");
96	<
97	<	// start the POA off
98	<	poa.the_POAManager().activate();
99	<
161	<	logger.write(toString, Logger.SYSINIT, "started");
162	<
163	<	// now we are running, we just need to serve
164	<	// so we ask the orb to block for us until it has finished
165	<	orb.run();
166	<
167	<	} catch (Exception e) {
168	<	System.err.println("FILTER ERROR: " + e);
169	<	e.printStackTrace(System.out);
170	<	}
94	>	// TCP Reader start (for heartbeats)
95	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
96	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
97	>	tcpReader.start();
98	>
99	>	_logger.write(toString(), Logger.SYSINIT, "started");
100		}
101
102	<	/**
103	<	* A simple method to print the usage of this class.
104	<	* It never returns, but instead exits to the system
105	<	* with a value 1, to indicate the system did not start
106	<	* properly.
102	>	/**
103	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
104	>	* method to provide clean logging (every class should have this).
105	>	*
106	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
107	>	* to format the toString()
108	>	*
109	>	* @return the name of this class and its CVS revision
110		*/
111	<	public static void usage() {
112	<	System.out.println("USAGE: java FilterMain <name>");
113	<	System.out.println("WHERE <name>:");
114	<	System.out.println("      The unique identifier for the Filter in the system.");
115	<	System.exit(1);
111	>	public String toString() {
112	>	return FormatName.getName(
113	>	NAME,
114	>	getClass().getName(),
115	>	REVISION);
116		}
117
186	–	//---CONSTRUCTORS---
187	–
188	–	//---PUBLIC METHODS---
189	–
118		//---PRIVATE METHODS---
119
120		//---ACCESSOR/MUTATOR METHODS---
121
122		//---ATTRIBUTES---
123
124	+	/**
125	+	* This holds a reference to the
126	+	* system logger that is being used.
127	+	*/
128	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
129	+
130	+	/**
131	+	* A reference to the reference manager in use
132	+	*/
133	+	private ReferenceManager _refman = ReferenceManager.getInstance();
134	+
135		//---STATIC ATTRIBUTES---
136	+
137	+	/**
138	+	* The friendly name for this component, used by
139	+	* all related classes.
140	+	* This is set from the configuration.
141	+	*/
142	+	public static String NAME;
143
144		}

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