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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 1.39 by tdb, Mon Feb 24 20:18:49 2003 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream central monitoring system
3	+	* http://www.i-scream.org.uk
4	+	* Copyright (C) 2000-2002 i-scream
5	+	*
6	+	* This program is free software; you can redistribute it and/or
7	+	* modify it under the terms of the GNU General Public License
8	+	* as published by the Free Software Foundation; either version 2
9	+	* of the License, or (at your option) any later version.
10	+	*
11	+	* This program is distributed in the hope that it will be useful,
12	+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14	+	* GNU General Public License for more details.
15	+	*
16	+	* You should have received a copy of the GNU General Public License
17	+	* along with this program; if not, write to the Free Software
18	+	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19	+	*/
20	+
21		//---PACKAGE DECLARATION---
22	<	package uk.ac.ukc.iscream.filter;
22	>	package uk.org.iscream.cms.server.filter;
23
24		//---IMPORTS---
25	<	import uk.ac.ukc.iscream.core.*;
26	<	import uk.ac.ukc.iscream.filter.*;
27	<	import org.omg.CORBA.*;
28	<	import org.omg.CosNaming.*;
9	<	import org.omg.PortableServer.*;
25	>	import uk.org.iscream.cms.util.*;
26	>	import uk.org.iscream.cms.server.core.*;
27	>	import uk.org.iscream.cms.server.componentmanager.*;
28	>	import uk.org.iscream.cms.server.filter.*;
29
30		/**
31		* A Filter Startup Class
32	+	* A filter is an iscream component.
33		*
34		* @author  $Author$
35		* @version $Id$
36		*/
37	<	class FilterMain {
37	>	public class FilterMain implements Component {
38
39		//---FINAL ATTRIBUTES---
40
#	Line 25 | Line 45 | class FilterMain {
45
46		//---STATIC METHODS---
47
48	<	public static void main(String[] args) {
49	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
50	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
48	>	//---CONSTRUCTORS---
49	>
50	>	/**
51	>	* Constructs a Filter with the name given
52	>	*
53	>	* @param givenName the name
54	>	*/
55	>	public FilterMain(String givenName) {
56	>	NAME = givenName;
57	>	}
58	>
59	>	//---PUBLIC METHODS---
60	>
61	>	/**
62	>	* Starts the Filter component
63	>	*/
64	>	public void start() throws ComponentStartException {
65	>	// get references to key objects
66	>	_logger = _refman.getLogger();
67
68	<	// get our name from the command line
69	<	String ourName = "";
70	<	if (args.length == 1) {
71	<	ourName = args[0];
68	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
69	>
70	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
71	>
72	>	// which input methods do we need to activate?
73	>	// default to activating them
74	>	boolean activateUDPReader = true;
75	>	boolean activateCORBAReader = true;
76	>
77	>	// check for UDP Reader
78	>	try {
79	>	int udp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateUDPReader"));
80	>	activateUDPReader = (udp == 1);
81	>	} catch (PropertyNotFoundException e) {
82	>	activateUDPReader = false;
83	>	} catch (NumberFormatException e) {
84	>	activateUDPReader = false;
85		}
86	<	else {
87	<	usage();
86	>	// check for CORBA Reader
87	>	try {
88	>	int corba = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateCORBAReader"));
89	>	activateCORBAReader = (corba == 1);
90	>	} catch (PropertyNotFoundException e) {
91	>	activateCORBAReader = false;
92	>	} catch (NumberFormatException e) {
93	>	activateCORBAReader = false;
94		}
95
96	<	// can't have a real toString() :)
97	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
96	>	// need to use the Queue later on
97	>	Queue queue;
98
99	<	try {
100	<	ORB orb = ORB.init(args, null);
101	<
102	<	// something to hold objects
103	<	org.omg.CORBA.Object objRef = null;
104	<
105	<	// get the Root POA
106	<	objRef = orb.resolve_initial_references("RootPOA");
107	<	POA poa = POAHelper.narrow(objRef);
108	<
109	<	// get a hook to the name service
110	<	objRef = orb.resolve_initial_references("NameService");
111	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
99	>	// there's little point starting a Queue and a FilterThread
100	>	// if nothing is going to be giving us any data
101	>	if(activateUDPReader || activateCORBAReader) {
102	>	// see if this Queue needs a size limit
103	>	try {
104	>	int queueSizeLimit = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.SizeLimit"));
105	>	String queueRemoveAlgorithm = cp.getProperty("Filter." + FilterMain.NAME, "Queue.RemoveAlgorithm");
106	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
107	>	if(algorithm != -1) {
108	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
109	>	// we have valid values, so lets start it.
110	>	queue = new Queue(queueSizeLimit, algorithm);
111	>	}
112	>	else {
113	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
114	>	// just don't activate a limit
115	>	queue = new Queue();
116	>	}
117
118	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
118	>	} catch (PropertyNotFoundException e) {
119	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
120	>	// just don't activate a limit
121	>	queue = new Queue();
122	>	} catch (NumberFormatException e) {
123	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
124	>	// just don't activate a limit
125	>	queue = new Queue();
126	>	}
127
128	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
129	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
130	<
131	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
132	<	Logger logger = LoggerHelper.narrow(objRef);
133	<
134	<	logger.write(toString, Logger.SYSINIT, "coming up");
135	<
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	<	}
128	>	// startup a monitor on this queue
129	>	try {
130	>	// try to get the interval, if this fails, we won't start up the monitor
131	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.MonitorInterval"));
132	>	String queueName = NAME + " Filter";
133	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
134	>	} catch (PropertyNotFoundException e) {
135	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
136		}
137
138	<	logger.write(toString, Logger.SYSINIT, "configured");
139	<
140	<	// **** END COMMENT
141	<
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);
107	<
108	<	// 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());
113	<
114	<	// register ourselves
115	<
116	<	// and advertise it to the naming context
117	<	objRef = poa.servant_to_reference(filterServant);
118	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
119	<
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);
138	>	// Start a filter thread
139	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
140	>	FilterThread filterThread = new FilterThread(queue);
141	>	filterThread.start();
142		}
143	+	else {
144	+	// it's pointless carrying on really...
145	+	throw new ComponentStartException("Can't start Filter without any inbound data feeds");
146	+	}
147	+
148	+	// the corba listener needs these to be set, so lets
149	+	// make them something obviously invalid initially
150	+	int UDPListenPort = -1;
151	+
152	+	// UDP Reader start (for inbound host data)
153	+	if(activateUDPReader) {
154	+	try {
155	+	// get the port number from the configuration
156	+	UDPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.UDPListenPort"));
157	+	// start the UDPReader
158	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
159	+	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
160	+	udpReader.start();
161	+	} catch (PropertyNotFoundException e) {
162	+	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to missing configuration: " + e);
163	+	} catch (NumberFormatException e) {
164	+	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to invalid configuration: " + e);
165	+	}
166	+	}
167	+
168	+	// FilterServant start (for inbound child filter data)
169	+	if(activateCORBAReader) {
170	+	// start the FilterServant
171	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to listen for downstream filters");
172	+	FilterServant filterServant = new FilterServant(queue);
173	+	_refman.bindToOrb(filterServant, "iscream.Filter\\." + FilterMain.NAME);
174	+	}
175	+
176	+	// FilterInfoServant start (to provide filter information to the server)
177	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to provide filter information");
178	+	FilterInfoServant filterInfoServant = new FilterInfoServant(UDPListenPort);
179	+	_refman.bindToOrb(filterInfoServant, "iscream.FilterInfo\\." + FilterMain.NAME);
180	+
181	+	_logger.write(toString(), Logger.SYSINIT, "started");
182		}
183	<
184	<	/**
185	<	* A simple method to print the usage of this class.
186	<	* It never returns, but instead exits to the system
187	<	* with a value 1, to indicate the system did not start
188	<	* properly.
183	>
184	>	/**
185	>	* Does a dependency check. Used mainly at startup to
186	>	* see if the required dependencies (components) are up
187	>	* and running.
188	>	*
189	>	* @return a boolean value, true if the depdencies are satisfied
190		*/
191	<	public static void usage() {
192	<	System.out.println("USAGE: java FilterMain <name>");
193	<	System.out.println("WHERE <name>:");
194	<	System.out.println("      The unique identifier for the Filter in the system.");
195	<	System.exit(1);
191	>	public boolean depCheck() {
192	>	try {
193	>	org.omg.CORBA.Object obj;
194	>	// first check the ConfigurationManager is alive
195	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
196	>	// then suss out our parent filter
197	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
198	>	String parentFilterName = cp.getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
199	>	// finally check the parent filter is alive
200	>	obj = _refman.getCORBARef("iscream.Filter\\." + parentFilterName);
201	>	} catch(ComponentCORBAException e) {
202	>	System.err.println(toString() + ": Dependency Failure: "+e);
203	>	return false;
204	>	} catch(PropertyNotFoundException e) {
205	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
206	>	return false;
207	>	}
208	>	// dependency check suceeded
209	>	return true;
210		}
211	+
212	+	/**
213	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
214	+	* method to provide clean logging (every class should have this).
215	+	*
216	+	* This uses the uk.org.iscream.cms.util.NameFormat class
217	+	* to format the toString()
218	+	*
219	+	* @return the name of this class and its CVS revision
220	+	*/
221	+	public String toString() {
222	+	return FormatName.getName(
223	+	NAME,
224	+	getClass().getName(),
225	+	REVISION);
226	+	}
227
186	–	//---CONSTRUCTORS---
187	–
188	–	//---PUBLIC METHODS---
189	–
228		//---PRIVATE METHODS---
229
230		//---ACCESSOR/MUTATOR METHODS---
231
232		//---ATTRIBUTES---
233
234	+	/**
235	+	* This holds a reference to the
236	+	* system logger that is being used.
237	+	*/
238	+	private Logger _logger;
239	+
240	+	/**
241	+	* A reference to the reference manager in use
242	+	*/
243	+	private ReferenceManager _refman = ReferenceManager.getInstance();
244	+
245		//---STATIC ATTRIBUTES---
246
247	<	}
247	>	/**
248	>	* The friendly name for this component, used by
249	>	* all related classes.
250	>	* This is set from the configuration.
251	>	*/
252	>	public static String NAME;
253	>
254	>	}

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