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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 1.31 by tdb, Tue May 29 17:02:35 2001 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];
43	<	}
44	<	else {
45	<	usage();
46	<	}
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	<	// can't have a real toString() :)
43	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
44	<
45	<	ReferenceManager refman = ReferenceManager.init(null, ourName);
48	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
49
50	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
51	<
52	<	// configuration variables we require
53	<	int UDPListenPort = 0;
54	<	int TCPListenPort = 0;
55	<	String parentFilterName = null;
56	<
57	<	Configuration config = refman.getCM().getConfiguration(refman.getName());
58	<	if (config == null) {
59	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
60	<	"         Advise you check the i-scream log for more information.");
61	<	} else {
62	<	try {
63	<	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
64	<	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
65	<	parentFilterName = config.getProperty("Filter.parentFilter");
66	<	} catch (org.omg.CORBA.MARSHAL e) {
67	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
68	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
69	<	"         Advise you check the i-scream log for more information.");
70	<
50	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
51	>
52	>	int UDPListenPort, TCPListenPort;
53	>	try {
54	>	UDPListenPort = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Filter.UDPListenPort"));
55	>	TCPListenPort = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Filter.TCPListenPort"));
56	>	} catch (PropertyNotFoundException e) {
57	>	throw new ComponentStartException("Unable to obtain requried configuration property for component: " + e);
58	>	}
59	>
60	>	// setup a queue
61	>	Queue queue;
62	>	// see if this Queue needs a size limit
63	>	try {
64	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Queue.SizeLimit"));
65	>	String queueRemoveAlgorithm = cp.getProperty(FilterMain.NAME, "Queue.RemoveAlgorithm");
66	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
67	>	if(algorithm != -1) {
68	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
69	>	// we have valid values, so lets start it.
70	>	queue = new Queue(queueSizeLimit, algorithm);
71		}
72	+	else {
73	+	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
74	+	// just don't activate a limit
75	+	queue = new Queue();
76	+	}
77	+
78	+	} catch (PropertyNotFoundException e) {
79	+	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
80	+	// just don't activate a limit
81	+	queue = new Queue();
82	+	} catch (NumberFormatException e) {
83	+	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
84	+	// just don't activate a limit
85	+	queue = new Queue();
86		}
70	–	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
71	–	// get parent
72	–	Filter parentFilter = FilterHelper.narrow(refman.getCORBARef("iscream.Filter." + parentFilterName));
87
88	<
88	>	// startup a monitor on this queue
89	>	try {
90	>	// try to get the interval, if this fails, we won't start up the monitor
91	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Queue.MonitorInterval"));
92	>	String queueName = NAME + " Filter";
93	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
94	>	} catch (PropertyNotFoundException e) {
95	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
96	>	}
97
98	+	// Start a filter thread
99	+	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
100	+	FilterThread filterThread = new FilterThread(queue);
101	+	filterThread.start();
102	+
103		// FilterServant start (for inbound child filter data)
104	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
105	<	FilterServant filterServant = new FilterServant(parentFilter, TCPListenPort, UDPListenPort);
106	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
104	>	_logger.write(toString(), Logger.DEBUG, "starting Servant to listen for downstream filters");
105	>	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
106	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
107
108		// UDL Reader start (for inbound host data)
109	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter UDP listener");
110	<	UDPReader udpReader = new UDPReader(UDPListenPort, parentFilter);
109	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
110	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
111		udpReader.start();
112
113		// TCP Reader start (for heartbeats)
114	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter TCP listener");
115	<	TCPReader tcpReader = new TCPReader(TCPListenPort, parentFilter);
114	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
115	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
116		tcpReader.start();
117
118	<	// start the POA off
92	<	// now we are running, we just need to serve
93	<	// so we ask the orb to block for us until it has finished
94	<	refman.activatePOA();
95	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
96	<	refman.getORB().run();
118	>	_logger.write(toString(), Logger.SYSINIT, "started");
119		}
120	<
121	<	/**
122	<	* A simple method to print the usage of this class.
123	<	* It never returns, but instead exits to the system
124	<	* with a value 1, to indicate the system did not start
125	<	* properly.
120	>
121	>	/**
122	>	* Does a dependency check. Used mainly at startup to
123	>	* see if the required dependencies (components) are up
124	>	* and running.
125	>	*
126	>	* @return a boolean value, true if the depdencies are satisfied
127		*/
128	<	public static void usage() {
129	<	System.out.println("USAGE: java FilterMain <name>");
130	<	System.out.println("WHERE <name>:");
131	<	System.out.println("      The unique identifier for the Filter in the system.");
132	<	System.exit(1);
128	>	public boolean depCheck() {
129	>	try {
130	>	org.omg.CORBA.Object obj;
131	>	// first check the ConfigurationManager is alive
132	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
133	>	// then suss out our parent filter
134	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
135	>	String parentFilterName = cp.getProperty(NAME, "Filter.parentFilter");
136	>	// finally check the parent filter is alive
137	>	obj = _refman.getCORBARef("iscream.Filter." + parentFilterName);
138	>	} catch(ComponentCORBAException e) {
139	>	System.err.println(toString() + ": Dependency Failure: "+e);
140	>	return false;
141	>	} catch(PropertyNotFoundException e) {
142	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
143	>	return false;
144	>	}
145	>	// dependency check suceeded
146	>	return true;
147		}
148	+
149	+	/**
150	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
151	+	* method to provide clean logging (every class should have this).
152	+	*
153	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
154	+	* to format the toString()
155	+	*
156	+	* @return the name of this class and its CVS revision
157	+	*/
158	+	public String toString() {
159	+	return FormatName.getName(
160	+	NAME,
161	+	getClass().getName(),
162	+	REVISION);
163	+	}
164
112	–	//---CONSTRUCTORS---
113	–
114	–	//---PUBLIC METHODS---
115	–
165		//---PRIVATE METHODS---
166
167		//---ACCESSOR/MUTATOR METHODS---
168
169		//---ATTRIBUTES---
170
171	+	/**
172	+	* This holds a reference to the
173	+	* system logger that is being used.
174	+	*/
175	+	private Logger _logger;
176	+
177	+	/**
178	+	* A reference to the reference manager in use
179	+	*/
180	+	private ReferenceManager _refman = ReferenceManager.getInstance();
181	+
182		//---STATIC ATTRIBUTES---
183
184	<	}
184	>	/**
185	>	* The friendly name for this component, used by
186	>	* all related classes.
187	>	* This is set from the configuration.
188	>	*/
189	>	public static String NAME;
190	>
191	>	}

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