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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 1.15 by ajm, Thu Nov 30 03:05:47 2000 UTC vs.
Revision 1.34 by tdb, Fri Mar 22 10:43:06 2002 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	<	package uk.ac.ukc.iscream.filter;
2	>	package uk.org.iscream.cms.server.filter;
3
4		//---IMPORTS---
5	<	import uk.ac.ukc.iscream.util.*;
6	<	import uk.ac.ukc.iscream.core.*;
7	<	import uk.ac.ukc.iscream.filter.*;
5	>	import uk.org.iscream.cms.server.util.*;
6	>	import uk.org.iscream.cms.server.core.*;
7	>	import uk.org.iscream.cms.server.componentmanager.*;
8	>	import uk.org.iscream.cms.server.filter.*;
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 23 | Line 25 | class FilterMain {
25
26		//---STATIC METHODS---
27
28	<	public static void main(String[] args) {
29	<	// ***************************************
30	<	// VERY TEMPORARY - will find a better way
31	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
32	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
33	<	// ***************************************
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	<	// get our name from the command line
40	<	String ourName = "";
41	<	if (args.length == 1) {
42	<	ourName = args[0];
39	>	//---PUBLIC METHODS---
40	>
41	>	/**
42	>	* Starts the Filter component
43	>	*/
44	>	public void start() throws ComponentStartException {
45	>	// get references to key objects
46	>	_logger = _refman.getLogger();
47	>
48	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
49	>
50	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
51	>
52	>	// which input methods do we need to activate?
53	>	// default to activating them
54	>	boolean activateTCPReader = true;
55	>	boolean activateUDPReader = true;
56	>	boolean activateCORBAReader = true;
57	>
58	>	// check for TCP Reader
59	>	try {
60	>	int tcp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateTCPReader"));
61	>	activateTCPReader = (tcp == 1);
62	>	} catch (PropertyNotFoundException e) {
63	>	activateTCPReader = false;
64	>	} catch (NumberFormatException e) {
65	>	activateTCPReader = false;
66		}
67	<	else {
68	<	usage();
67	>	// check for UDP Reader
68	>	try {
69	>	int udp = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateUDPReader"));
70	>	activateUDPReader = (udp == 1);
71	>	} catch (PropertyNotFoundException e) {
72	>	activateUDPReader = false;
73	>	} catch (NumberFormatException e) {
74	>	activateUDPReader = false;
75		}
76	+	// check for CORBA Reader
77	+	try {
78	+	int corba = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.ActivateCORBAReader"));
79	+	activateCORBAReader = (corba == 1);
80	+	} catch (PropertyNotFoundException e) {
81	+	activateCORBAReader = false;
82	+	} catch (NumberFormatException e) {
83	+	activateCORBAReader = false;
84	+	}
85
86	<	// can't have a real toString() :)
87	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
44	<
45	<	ReferenceManager refman = ReferenceManager.init(null, ourName);
86	>	// need to use the Queue later on
87	>	Queue queue;
88
89	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
89	>	// there's little point starting a Queue and a FilterThread
90	>	// if nothing is going to be giving us any data
91	>	if(activateTCPReader || activateUDPReader || activateCORBAReader) {
92	>	// see if this Queue needs a size limit
93	>	try {
94	>	int queueSizeLimit = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.SizeLimit"));
95	>	String queueRemoveAlgorithm = cp.getProperty("Filter." + FilterMain.NAME, "Queue.RemoveAlgorithm");
96	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
97	>	if(algorithm != -1) {
98	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
99	>	// we have valid values, so lets start it.
100	>	queue = new Queue(queueSizeLimit, algorithm);
101	>	}
102	>	else {
103	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
104	>	// just don't activate a limit
105	>	queue = new Queue();
106	>	}
107	>
108	>	} catch (PropertyNotFoundException e) {
109	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
110	>	// just don't activate a limit
111	>	queue = new Queue();
112	>	} catch (NumberFormatException e) {
113	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
114	>	// just don't activate a limit
115	>	queue = new Queue();
116	>	}
117
118	<	// configuration variables we require
50	<	int UDPListenPort = 0;
51	<	int TCPListenPort = 0;
52	<	String parentFilterName = null;
53	<
54	<	Configuration config = refman.getCM().getConfiguration(refman.getName());
55	<	if (config == null) {
56	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
57	<	"         Advise you check the i-scream log for more information.");
58	<	} else {
118	>	// startup a monitor on this queue
119		try {
120	<	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
121	<	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
122	<	parentFilterName = config.getProperty("Filter.parentFilter");
123	<	} catch (org.omg.CORBA.MARSHAL e) {
124	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
125	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
66	<	"         Advise you check the i-scream log for more information.");
67	<
120	>	// try to get the interval, if this fails, we won't start up the monitor
121	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Queue.MonitorInterval"));
122	>	String queueName = NAME + " Filter";
123	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
124	>	} catch (PropertyNotFoundException e) {
125	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
126		}
127	+
128	+	// Start a filter thread
129	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
130	+	FilterThread filterThread = new FilterThread(queue);
131	+	filterThread.start();
132		}
133	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
134	<	// get parent
135	<	Filter parentFilter = FilterHelper.narrow(refman.getCORBARef("iscream.Filter." + parentFilterName));
133	>	else {
134	>	// it's pointless carrying on really...
135	>	throw new ComponentStartException("Can't start Filter without any inbound data feeds");
136	>	}
137
138	<
138	>	// the corba listener needs these to be set, so lets
139	>	// make them something obviously invalid initially
140	>	int TCPListenPort = -1;
141	>	int UDPListenPort = -1;
142
76	–	// FilterServant start (for inbound child filter data)
77	–	refman.getLogger().write(toString, Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
78	–	FilterServant filterServant = new FilterServant(parentFilter, TCPListenPort, UDPListenPort);
79	–	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
80	–
81	–	// UDL Reader start (for inbound host data)
82	–	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter UDP listener");
83	–	UDPReader udpReader = new UDPReader(UDPListenPort, parentFilter);
84	–	udpReader.start();
85	–
143		// TCP Reader start (for heartbeats)
144	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter TCP listener");
145	<	TCPReader tcpReader = new TCPReader(TCPListenPort, parentFilter);
146	<	tcpReader.start();
144	>	if(activateTCPReader) {
145	>	try {
146	>	// get the port number from the configuration
147	>	TCPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.TCPListenPort"));
148	>	// start the TCPReader
149	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
150	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
151	>	tcpReader.start();
152	>	} catch (PropertyNotFoundException e) {
153	>	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to missing configuration: " + e);
154	>	} catch (NumberFormatException e) {
155	>	_logger.write(toString(), Logger.WARNING, "Unable to start TCPReader due to invalid configuration: " + e);
156	>	}
157	>	}
158
159	<	// start the POA off
160	<	// now we are running, we just need to serve
161	<	// so we ask the orb to block for us until it has finished
162	<	refman.activatePOA();
163	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
164	<	refman.getORB().run();
159	>	// UDP Reader start (for inbound host data)
160	>	if(activateUDPReader) {
161	>	try {
162	>	// get the port number from the configuration
163	>	UDPListenPort = Integer.parseInt(cp.getProperty("Filter." + FilterMain.NAME, "Filter.UDPListenPort"));
164	>	// start the UDPReader
165	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
166	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
167	>	udpReader.start();
168	>	} catch (PropertyNotFoundException e) {
169	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to missing configuration: " + e);
170	>	} catch (NumberFormatException e) {
171	>	_logger.write(toString(), Logger.WARNING, "Unable to start UDPReader due to invalid configuration: " + e);
172	>	}
173	>	}
174	>
175	>	// FilterServant start (for inbound child filter data)
176	>	if(activateCORBAReader) {
177	>	// start the FilterServant
178	>	_logger.write(toString(), Logger.SYSINIT, "starting Servant to listen for downstream filters");
179	>	FilterServant filterServant = new FilterServant(queue);
180	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
181	>	}
182	>
183	>	// FilterInfoServant start (to provide filter information to the server)
184	>	_logger.write(toString(), Logger.SYSINIT, "starting Servant to provide filter information");
185	>	FilterInfoServant filterInfoServant = new FilterInfoServant(TCPListenPort, UDPListenPort);
186	>	_refman.bindToOrb(filterInfoServant, "iscream.FilterInfo." + FilterMain.NAME);
187	>
188	>	_logger.write(toString(), Logger.SYSINIT, "started");
189		}
190	<
191	<	/**
192	<	* A simple method to print the usage of this class.
193	<	* It never returns, but instead exits to the system
194	<	* with a value 1, to indicate the system did not start
195	<	* properly.
190	>
191	>	/**
192	>	* Does a dependency check. Used mainly at startup to
193	>	* see if the required dependencies (components) are up
194	>	* and running.
195	>	*
196	>	* @return a boolean value, true if the depdencies are satisfied
197		*/
198	<	public static void usage() {
199	<	System.out.println("USAGE: java FilterMain <name>");
200	<	System.out.println("WHERE <name>:");
201	<	System.out.println("      The unique identifier for the Filter in the system.");
202	<	System.exit(1);
198	>	public boolean depCheck() {
199	>	try {
200	>	org.omg.CORBA.Object obj;
201	>	// first check the ConfigurationManager is alive
202	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
203	>	// then suss out our parent filter
204	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
205	>	String parentFilterName = cp.getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
206	>	// finally check the parent filter is alive
207	>	obj = _refman.getCORBARef("iscream.Filter." + parentFilterName);
208	>	} catch(ComponentCORBAException e) {
209	>	System.err.println(toString() + ": Dependency Failure: "+e);
210	>	return false;
211	>	} catch(PropertyNotFoundException e) {
212	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
213	>	return false;
214	>	}
215	>	// dependency check suceeded
216	>	return true;
217		}
218	+
219	+	/**
220	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
221	+	* method to provide clean logging (every class should have this).
222	+	*
223	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
224	+	* to format the toString()
225	+	*
226	+	* @return the name of this class and its CVS revision
227	+	*/
228	+	public String toString() {
229	+	return FormatName.getName(
230	+	NAME,
231	+	getClass().getName(),
232	+	REVISION);
233	+	}
234
112	–	//---CONSTRUCTORS---
113	–
114	–	//---PUBLIC METHODS---
115	–
235		//---PRIVATE METHODS---
236
237		//---ACCESSOR/MUTATOR METHODS---
238
239		//---ATTRIBUTES---
240
241	+	/**
242	+	* This holds a reference to the
243	+	* system logger that is being used.
244	+	*/
245	+	private Logger _logger;
246	+
247	+	/**
248	+	* A reference to the reference manager in use
249	+	*/
250	+	private ReferenceManager _refman = ReferenceManager.getInstance();
251	+
252		//---STATIC ATTRIBUTES---
253
254	<	}
254	>	/**
255	>	* The friendly name for this component, used by
256	>	* all related classes.
257	>	* This is set from the configuration.
258	>	*/
259	>	public static String NAME;
260	>
261	>	}

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