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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 1.10 by tdb, Mon Nov 27 21:46:25 2000 UTC vs.
Revision 1.20 by tdb, Sun Jan 28 06:03:58 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	>
46	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
47	>
48	>	// configuration variables we require
49	>	int UDPListenPort = 0;
50	>	int TCPListenPort = 0;
51	>	String parentFilterName = null;
52
53	<	// get our name from the command line
54	<	String ourName = "";
55	<	if (args.length == 1) {
34	<	ourName = args[0];
53	>	Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME);
54	>	if (config == null) {
55	>	throw new ComponentStartException("Unable to obtain configuration for component");
56		}
57		else {
58	<	usage();
58	>	try {
59	>	// get the configuration properties we need
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	>	throw new ComponentStartException("Unable to obtain requried configuration property for component");
65	>	}
66		}
67
68	<	// can't have a real toString() :)
41	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
68	>	_logger.write(toString(), Logger.SYSINIT, "configured");
69
70	<	try {
71	<	ORB orb = ORB.init(args, null);
72	<
73	<	// something to hold objects
74	<	org.omg.CORBA.Object objRef = null;
75	<
76	<	// get the Root POA
77	<	objRef = orb.resolve_initial_references("RootPOA");
78	<	POA poa = POAHelper.narrow(objRef);
79	<
80	<	// get a hook to the name service
81	<	objRef = orb.resolve_initial_references("NameService");
82	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
83	<
84	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
58	<
59	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
60	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
61	<
62	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
63	<	Logger logger = LoggerHelper.narrow(objRef);
64	<
65	<	logger.write(toString, Logger.SYSINIT, "coming up");
66	<
67	<
68	<	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
69	<	// **** Please ignore this block of code, it's just "copy/paste" :)
70	<
71	<	// get the config
72	<	Configuration myConfig = configManager.getConfiguration(ourName);
73	<
74	<	// read some config here
75	<	int UDPport = 0;
76	<	int TCPport = 0;
77	<	String parentFilterName = null;
78	<
79	<	// did we?
80	<	if (myConfig == null) {
81	<	System.out.println("Failed: is it there?, can you read it?");
82	<	System.exit(1);
83	<	} else {
84	<
85	<	// get the property
86	<	try {
87	<	//QUERY HERE.... ???
88	<	UDPport = new Integer(myConfig.getProperty("Filter.UDPlistenPort")).intValue();
89	<	TCPport = new Integer(myConfig.getProperty("Filter.TCPlistenPort")).intValue();
90	<	parentFilterName = myConfig.getProperty("Filter.parentFilter");
91	<	} catch (org.omg.CORBA.MARSHAL e) {
92	<	System.out.println("Caught org.omg.CORBA.MARSHAL, must be a null we got back");
93	<	//System.exit(1);
94	<	}
95	<	}
96	<
97	<	logger.write(toString, Logger.SYSINIT, "configured");
98	<
99	<	// **** END COMMENT
100	<
101	<	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
102	<
103	<	// get a root (CHANGE to use FilterManager)
104	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Filter." + parentFilterName));
105	<	Filter parentFilter = FilterHelper.narrow(objRef);
70	>	// get parent
71	>	Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
72	>
73	>	// setup a queue
74	>	Queue queue = new Queue();
75	>
76	>	// Start a filter thread
77	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
78	>	FilterThread filterThread = new FilterThread(queue, parentFilter);
79	>	filterThread.start();
80	>
81	>	// FilterServant start (for inbound child filter data)
82	>	_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
83	>	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
84	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
85
86	<	// SETUP our Servant
87	<
88	<	// create the FilterServant
89	<	FilterServant filterServant = new FilterServant(logger, parentFilter, ourName, new Integer(TCPport).toString() , new Integer(UDPport).toString());
86	>	// UDL Reader start (for inbound host data)
87	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
88	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
89	>	udpReader.start();
90
91	<	// register ourselves
92	<
93	<	// and advertise it to the naming context
94	<	objRef = poa.servant_to_reference(filterServant);
95	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
96	<
118	<	// **** END COMMENT
119	<
120	<	// END SETUP
121	<
122	<
123	<	/**************************************************************
124	<	Here would be an ideal place to start another thread to do
125	<	the listening part of the Filter. Ideally it should just be
126	<	created and then run(). It may be necessary to pass some of
127	<	the following parameters into the thread by the constructor.
128	<
129	<	Logger logger
130	<	- a reference to a Logger object
131	<	FilterManager filterManager
132	<	- a reference to the system filter manager
133	<	ConfigurationManager configManager
134	<	- a reference to the system configuration manager
135	<	Configuration myConfig
136	<	- a reference to the configuration object for this
137	<	filter instance
138	<	String ourName
139	<	- our "identifier" name
140	<
141	<	**************************************************************/
142	<
143	<	logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener");
144	<	UDPReader udpReader = new UDPReader(UDPport, parentFilter, logger);
145	<	udpReader.start();
146	<	logger.write(toString, Logger.SYSINIT, "Filter UDP listener started");
147	<
148	<	logger.write(toString, Logger.SYSINIT, "starting Filter TCP listener");
149	<	TCPReader tcpReader = new TCPReader(logger, configManager, TCPport, parentFilter);
150	<	tcpReader.start();
151	<	logger.write(toString, Logger.SYSINIT, "Filter TCP listener started");
152	<
153	<	// TEST
154	<	//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>");
155	<
156	<	// start the POA off
157	<	poa.the_POAManager().activate();
158	<
159	<	logger.write(toString, Logger.SYSINIT, "started");
160	<
161	<	// now we are running, we just need to serve
162	<	// so we ask the orb to block for us until it has finished
163	<	orb.run();
164	<
165	<	} catch (Exception e) {
166	<	System.err.println("FILTER ERROR: " + e);
167	<	e.printStackTrace(System.out);
168	<	}
91	>	// TCP Reader start (for heartbeats)
92	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
93	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
94	>	tcpReader.start();
95	>
96	>	_logger.write(toString(), Logger.SYSINIT, "started");
97		}
98
99	<	/**
100	<	* A simple method to print the usage of this class.
101	<	* It never returns, but instead exits to the system
102	<	* with a value 1, to indicate the system did not start
103	<	* properly.
99	>	/**
100	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
101	>	* method to provide clean logging (every class should have this).
102	>	*
103	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
104	>	* to format the toString()
105	>	*
106	>	* @return the name of this class and its CVS revision
107		*/
108	<	public static void usage() {
109	<	System.out.println("USAGE: java FilterMain <name>");
110	<	System.out.println("WHERE <name>:");
111	<	System.out.println("      The unique identifier for the Filter in the system.");
112	<	System.exit(1);
108	>	public String toString() {
109	>	return FormatName.getName(
110	>	NAME,
111	>	getClass().getName(),
112	>	REVISION);
113		}
114
184	–	//---CONSTRUCTORS---
185	–
186	–	//---PUBLIC METHODS---
187	–
115		//---PRIVATE METHODS---
116
117		//---ACCESSOR/MUTATOR METHODS---
118
119		//---ATTRIBUTES---
120
121	+	/**
122	+	* This holds a reference to the
123	+	* system logger that is being used.
124	+	*/
125	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
126	+
127	+	/**
128	+	* A reference to the reference manager in use
129	+	*/
130	+	private ReferenceManager _refman = ReferenceManager.getInstance();
131	+
132		//---STATIC ATTRIBUTES---
133	+
134	+	/**
135	+	* The friendly name for this component, used by
136	+	* all related classes.
137	+	* This is set from the configuration.
138	+	*/
139	+	public static String NAME;
140
141		}

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