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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 1.35 by tdb, Sat May 18 18:16:01 2002 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream central monitoring system
3	+	* Copyright (C) 2000-2002 i-scream
4	+	*
5	+	* This program is free software; you can redistribute it and/or
6	+	* modify it under the terms of the GNU General Public License
7	+	* as published by the Free Software Foundation; either version 2
8	+	* of the License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful,
11	+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13	+	* GNU General Public License for more details.
14	+	*
15	+	* You should have received a copy of the GNU General Public License
16	+	* along with this program; if not, write to the Free Software
17	+	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18	+	*/
19	+
20		//---PACKAGE DECLARATION---
21	+	package uk.org.iscream.cms.server.filter;
22
23		//---IMPORTS---
24	<	import uk.ac.ukc.iscream.core.*;
25	<	import uk.ac.ukc.iscream.filter.*;
26	<	import org.omg.CORBA.*;
27	<	import org.omg.CosNaming.*;
8	<	import org.omg.PortableServer.*;
24	>	import uk.org.iscream.cms.server.util.*;
25	>	import uk.org.iscream.cms.server.core.*;
26	>	import uk.org.iscream.cms.server.componentmanager.*;
27	>	import uk.org.iscream.cms.server.filter.*;
28
29		/**
30		* A Filter Startup Class
31	+	* A filter is an iscream component.
32		*
33		* @author  $Author$
34		* @version $Id$
35		*/
36	<	class FilterMain {
36	>	public class FilterMain implements Component {
37
38		//---FINAL ATTRIBUTES---
39
#	Line 24 | Line 44 | class FilterMain {
44
45		//---STATIC METHODS---
46
47	<	public static void main(String[] args) {
48	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
49	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
47	>	//---CONSTRUCTORS---
48	>
49	>	/**
50	>	* Constructs a Filter with the name given
51	>	*
52	>	* @param givenName the name
53	>	*/
54	>	public FilterMain(String givenName) {
55	>	NAME = givenName;
56	>	}
57	>
58	>	//---PUBLIC METHODS---
59	>
60	>	/**
61	>	* Starts the Filter component
62	>	*/
63	>	public void start() throws ComponentStartException {
64	>	// get references to key objects
65	>	_logger = _refman.getLogger();
66
67	<	// get our name from the command line
68	<	String ourName = "";
69	<	if (args.length == 1) {
70	<	ourName = args[0];
67	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
68	>
69	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
70	>
71	>	// which input methods do we need to activate?
72	>	// default to activating them
73	>	boolean activateTCPReader = true;
74	>	boolean activateUDPReader = true;
75	>	boolean activateCORBAReader = true;
76	>
77	>	// check for TCP Reader
78	>	try {
79	>	int tcp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateTCPReader"));
80	>	activateTCPReader = (tcp == 1);
81	>	} catch (PropertyNotFoundException e) {
82	>	activateTCPReader = false;
83	>	} catch (NumberFormatException e) {
84	>	activateTCPReader = false;
85		}
86	<	else {
87	<	usage();
86	>	// check for UDP Reader
87	>	try {
88	>	int udp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateUDPReader"));
89	>	activateUDPReader = (udp == 1);
90	>	} catch (PropertyNotFoundException e) {
91	>	activateUDPReader = false;
92	>	} catch (NumberFormatException e) {
93	>	activateUDPReader = false;
94		}
95	+	// check for CORBA Reader
96	+	try {
97	+	int corba = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateCORBAReader"));
98	+	activateCORBAReader = (corba == 1);
99	+	} catch (PropertyNotFoundException e) {
100	+	activateCORBAReader = false;
101	+	} catch (NumberFormatException e) {
102	+	activateCORBAReader = false;
103	+	}
104
105	<	// can't have a real toString() :)
106	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
105	>	// need to use the Queue later on
106	>	Queue queue;
107
108	<	try {
109	<	ORB orb = ORB.init(args, null);
110	<
111	<	// something to hold objects
112	<	org.omg.CORBA.Object objRef = null;
113	<
114	<	// get the Root POA
115	<	objRef = orb.resolve_initial_references("RootPOA");
116	<	POA poa = POAHelper.narrow(objRef);
117	<
118	<	// get a hook to the name service
119	<	objRef = orb.resolve_initial_references("NameService");
120	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
108	>	// there's little point starting a Queue and a FilterThread
109	>	// if nothing is going to be giving us any data
110	>	if(activateTCPReader || activateUDPReader || activateCORBAReader) {
111	>	// see if this Queue needs a size limit
112	>	try {
113	>	int queueSizeLimit = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.SizeLimit"));
114	>	String queueRemoveAlgorithm = cp.getProperty("Filter." + FilterMain.NAME, "Queue.RemoveAlgorithm");
115	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
116	>	if(algorithm != -1) {
117	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
118	>	// we have valid values, so lets start it.
119	>	queue = new Queue(queueSizeLimit, algorithm);
120	>	}
121	>	else {
122	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
123	>	// just don't activate a limit
124	>	queue = new Queue();
125	>	}
126
127	<	// get a ref to the ConfigurationManager, Logger & the FilterManager
127	>	} catch (PropertyNotFoundException e) {
128	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
129	>	// just don't activate a limit
130	>	queue = new Queue();
131	>	} catch (NumberFormatException e) {
132	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
133	>	// just don't activate a limit
134	>	queue = new Queue();
135	>	}
136
137	<	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
138	<	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
139	<
140	<	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
141	<	Logger logger = LoggerHelper.narrow(objRef);
142	<
143	<	logger.write(toString, Logger.SYSINIT, "coming up");
144	<
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	<	}
137	>	// startup a monitor on this queue
138	>	try {
139	>	// try to get the interval, if this fails, we won't start up the monitor
140	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.MonitorInterval"));
141	>	String queueName = NAME + " Filter";
142	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
143	>	} catch (PropertyNotFoundException e) {
144	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
145		}
146
147	<	logger.write(toString, Logger.SYSINIT, "configured");
148	<
149	<	// **** END COMMENT
150	<
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);
106	<
107	<	// SETUP our Servant
108	<
109	<	// create the FilterServant
110	<	FilterServant filterServant = new FilterServant(logger, parentFilter, ourName, new Integer(TCPport).toString() , new Integer(UDPport).toString());
111	<
112	<	// register ourselves
113	<
114	<	// and advertise it to the naming context
115	<	objRef = poa.servant_to_reference(filterServant);
116	<	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
117	<
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);
147	>	// Start a filter thread
148	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
149	>	FilterThread filterThread = new FilterThread(queue);
150	>	filterThread.start();
151		}
152	+	else {
153	+	// it's pointless carrying on really...
154	+	throw new ComponentStartException("Can't start Filter without any inbound data feeds");
155	+	}
156	+
157	+	// the corba listener needs these to be set, so lets
158	+	// make them something obviously invalid initially
159	+	int TCPListenPort = -1;
160	+	int UDPListenPort = -1;
161	+
162	+	// TCP Reader start (for heartbeats)
163	+	if(activateTCPReader) {
164	+	try {
165	+	// get the port number from the configuration
166	+	TCPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.TCPListenPort"));
167	+	// start the TCPReader
168	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
169	+	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
170	+	tcpReader.start();
171	+	} catch (PropertyNotFoundException e) {
172	+	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to missing configuration: " + e);
173	+	} catch (NumberFormatException e) {
174	+	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to invalid configuration: " + e);
175	+	}
176	+	}
177	+
178	+	// UDP Reader start (for inbound host data)
179	+	if(activateUDPReader) {
180	+	try {
181	+	// get the port number from the configuration
182	+	UDPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.UDPListenPort"));
183	+	// start the UDPReader
184	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
185	+	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
186	+	udpReader.start();
187	+	} catch (PropertyNotFoundException e) {
188	+	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to missing configuration: " + e);
189	+	} catch (NumberFormatException e) {
190	+	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to invalid configuration: " + e);
191	+	}
192	+	}
193	+
194	+	// FilterServant start (for inbound child filter data)
195	+	if(activateCORBAReader) {
196	+	// start the FilterServant
197	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to listen for downstream filters");
198	+	FilterServant filterServant = new FilterServant(queue);
199	+	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
200	+	}
201	+
202	+	// FilterInfoServant start (to provide filter information to the server)
203	+	_logger.write(toString(), Logger.SYSINIT, "starting Servant to provide filter information");
204	+	FilterInfoServant filterInfoServant = new FilterInfoServant(TCPListenPort, UDPListenPort);
205	+	_refman.bindToOrb(filterInfoServant, "iscream.FilterInfo." + FilterMain.NAME);
206	+
207	+	_logger.write(toString(), Logger.SYSINIT, "started");
208		}
209	<
210	<	/**
211	<	* A simple method to print the usage of this class.
212	<	* It never returns, but instead exits to the system
213	<	* with a value 1, to indicate the system did not start
214	<	* properly.
209	>
210	>	/**
211	>	* Does a dependency check. Used mainly at startup to
212	>	* see if the required dependencies (components) are up
213	>	* and running.
214	>	*
215	>	* @return a boolean value, true if the depdencies are satisfied
216		*/
217	<	public static void usage() {
218	<	System.out.println("USAGE: java FilterMain <name>");
219	<	System.out.println("WHERE <name>:");
220	<	System.out.println("      The unique identifier for the Filter in the system.");
221	<	System.exit(1);
217	>	public boolean depCheck() {
218	>	try {
219	>	org.omg.CORBA.Object obj;
220	>	// first check the ConfigurationManager is alive
221	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
222	>	// then suss out our parent filter
223	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
224	>	String parentFilterName = cp.getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
225	>	// finally check the parent filter is alive
226	>	obj = _refman.getCORBARef("iscream.Filter." + parentFilterName);
227	>	} catch(ComponentCORBAException e) {
228	>	System.err.println(toString() + ": Dependency Failure: "+e);
229	>	return false;
230	>	} catch(PropertyNotFoundException e) {
231	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
232	>	return false;
233	>	}
234	>	// dependency check suceeded
235	>	return true;
236		}
237	+
238	+	/**
239	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
240	+	* method to provide clean logging (every class should have this).
241	+	*
242	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
243	+	* to format the toString()
244	+	*
245	+	* @return the name of this class and its CVS revision
246	+	*/
247	+	public String toString() {
248	+	return FormatName.getName(
249	+	NAME,
250	+	getClass().getName(),
251	+	REVISION);
252	+	}
253
184	–	//---CONSTRUCTORS---
185	–
186	–	//---PUBLIC METHODS---
187	–
254		//---PRIVATE METHODS---
255
256		//---ACCESSOR/MUTATOR METHODS---
257
258		//---ATTRIBUTES---
259
260	+	/**
261	+	* This holds a reference to the
262	+	* system logger that is being used.
263	+	*/
264	+	private Logger _logger;
265	+
266	+	/**
267	+	* A reference to the reference manager in use
268	+	*/
269	+	private ReferenceManager _refman = ReferenceManager.getInstance();
270	+
271		//---STATIC ATTRIBUTES---
272
273	<	}
273	>	/**
274	>	* The friendly name for this component, used by
275	>	* all related classes.
276	>	* This is set from the configuration.
277	>	*/
278	>	public static String NAME;
279	>
280	>	}

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