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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 1.25 by tdb, Tue Mar 13 16:25:57 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");
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	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
52	>
53	>	int UDPListenPort, TCPListenPort;
54	>	try {
55	>	UDPListenPort = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Filter.UDPListenPort"));
56	>	TCPListenPort = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Filter.TCPListenPort"));
57	>	} catch (PropertyNotFoundException e) {
58	>	throw new ComponentStartException("Unable to obtain requried configuration property for component: " + e);
59		}
60	<	else {
61	<	usage();
60	>
61	>	// setup a queue
62	>	Queue queue = new Queue();
63	>
64	>	// startup a monitor on this queue
65	>	try {
66	>	// try to get the interval, if this fails, we won't start up the monitor
67	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Queue.MonitorInterval"));
68	>	String queueName = NAME + " Filter";
69	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
70	>	} catch (PropertyNotFoundException e) {
71	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
72		}
73
74	<	// can't have a real toString() :)
75	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
74	>	// Start a filter thread
75	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
76	>	FilterThread filterThread = new FilterThread(queue);
77	>	filterThread.start();
78
79	<	try {
80	<	ORB orb = ORB.init(args, null);
81	<
82	<	// 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);
79	>	// FilterServant start (for inbound child filter data)
80	>	_logger.write(toString(), Logger.DEBUG, "starting Servant to listen for downstream filters");
81	>	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
82	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
83
84	<	// SETUP our Servant
85	<
86	<	// create the FilterServant
87	<	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());
84	>	// UDL Reader start (for inbound host data)
85	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
86	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
87	>	udpReader.start();
88
89	<	// register ourselves
90	<
91	<	// and advertise it to the naming context
92	<	objRef = poa.servant_to_reference(filterServant);
93	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
94	<
120	<	// **** END COMMENT
121	<
122	<	// END SETUP
123	<
124	<
125	<	/**************************************************************
126	<	Here would be an ideal place to start another thread to do
127	<	the listening part of the Filter. Ideally it should just be
128	<	created and then run(). It may be necessary to pass some of
129	<	the following parameters into the thread by the constructor.
130	<
131	<	Logger logger
132	<	- a reference to a Logger object
133	<	FilterManager filterManager
134	<	- a reference to the system filter manager
135	<	ConfigurationManager configManager
136	<	- a reference to the system configuration manager
137	<	Configuration myConfig
138	<	- a reference to the configuration object for this
139	<	filter instance
140	<	String ourName
141	<	- our "identifier" name
142	<
143	<	**************************************************************/
144	<
145	<	logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener");
146	<	UDPReader udpReader = new UDPReader(UDPport, parentFilter, logger);
147	<	udpReader.start();
148	<	logger.write(toString, Logger.SYSINIT, "Filter UDP listener started");
149	<
150	<	logger.write(toString, Logger.SYSINIT, "starting Filter TCP listener");
151	<	TCPReader tcpReader = new TCPReader(logger, configManager, TCPport, parentFilter);
152	<	tcpReader.start();
153	<	logger.write(toString, Logger.SYSINIT, "Filter TCP listener started");
154	<
155	<	// TEST
156	<	//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>");
157	<
158	<	// start the POA off
159	<	poa.the_POAManager().activate();
160	<
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	<	}
89	>	// TCP Reader start (for heartbeats)
90	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
91	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
92	>	tcpReader.start();
93	>
94	>	_logger.write(toString(), Logger.SYSINIT, "started");
95		}
96
97	<	/**
98	<	* A simple method to print the usage of this class.
99	<	* It never returns, but instead exits to the system
100	<	* with a value 1, to indicate the system did not start
101	<	* properly.
97	>	/**
98	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
99	>	* method to provide clean logging (every class should have this).
100	>	*
101	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
102	>	* to format the toString()
103	>	*
104	>	* @return the name of this class and its CVS revision
105		*/
106	<	public static void usage() {
107	<	System.out.println("USAGE: java FilterMain <name>");
108	<	System.out.println("WHERE <name>:");
109	<	System.out.println("      The unique identifier for the Filter in the system.");
110	<	System.exit(1);
106	>	public String toString() {
107	>	return FormatName.getName(
108	>	NAME,
109	>	getClass().getName(),
110	>	REVISION);
111		}
112
186	–	//---CONSTRUCTORS---
187	–
188	–	//---PUBLIC METHODS---
189	–
113		//---PRIVATE METHODS---
114
115		//---ACCESSOR/MUTATOR METHODS---
116
117		//---ATTRIBUTES---
118
119	+	/**
120	+	* This holds a reference to the
121	+	* system logger that is being used.
122	+	*/
123	+	private Logger _logger;
124	+
125	+	/**
126	+	* A reference to the reference manager in use
127	+	*/
128	+	private ReferenceManager _refman;
129	+
130		//---STATIC ATTRIBUTES---
131
132	<	}
132	>	/**
133	>	* The friendly name for this component, used by
134	>	* all related classes.
135	>	* This is set from the configuration.
136	>	*/
137	>	public static String NAME;
138	>
139	>	}

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