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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 1.28 by tdb, Wed Mar 14 01:54:28 2001 UTC

#	Line 4 | Line 4 | package uk.ac.ukc.iscream.filter;
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.*;
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	>	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		}
38	–	else {
39	–	usage();
40	–	}
59
60	<	// can't have a real toString() :)
61	<	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
44	<
45	<	ReferenceManager refman = ReferenceManager.init(null, ourName);
60	>	// setup a queue
61	>	Queue queue = new Queue();
62
63	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
64	<
65	<	// configuration variables we require
66	<	int UDPListenPort = 0;
67	<	int TCPListenPort = 0;
68	<	String parentFilterName = null;
69	<
70	<	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 {
59	<	try {
60	<	UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort"));
61	<	TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort"));
62	<	parentFilterName = config.getProperty("Filter.parentFilter");
63	<	} catch (org.omg.CORBA.MARSHAL e) {
64	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
65	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
66	<	"         Advise you check the i-scream log for more information.");
67	<
68	<	}
63	>	// startup a monitor on this queue
64	>	try {
65	>	// try to get the interval, if this fails, we won't start up the monitor
66	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(FilterMain.NAME, "Queue.MonitorInterval"));
67	>	String queueName = NAME + " Filter";
68	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
69	>	} catch (PropertyNotFoundException e) {
70	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
71		}
70	–	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
71	–	// get parent
72	–	Filter parentFilter = FilterHelper.narrow(refman.getCORBARef("iscream.Filter." + parentFilterName));
72
73	<
73	>	// Start a filter thread
74	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer");
75	>	FilterThread filterThread = new FilterThread(queue);
76	>	filterThread.start();
77
78		// FilterServant start (for inbound child filter data)
79	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName);
80	<	FilterServant filterServant = new FilterServant(parentFilter, TCPListenPort, UDPListenPort);
81	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
79	>	_logger.write(toString(), Logger.DEBUG, "starting Servant to listen for downstream filters");
80	>	FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue);
81	>	_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME);
82
83		// UDL Reader start (for inbound host data)
84	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter UDP listener");
85	<	UDPReader udpReader = new UDPReader(UDPListenPort, parentFilter);
84	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener");
85	>	UDPReader udpReader = new UDPReader(UDPListenPort, queue);
86		udpReader.start();
87
88		// TCP Reader start (for heartbeats)
89	<	refman.getLogger().write(toString, Logger.SYSINIT, "starting Filter TCP listener");
90	<	TCPReader tcpReader = new TCPReader(TCPListenPort, parentFilter);
89	>	_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener");
90	>	TCPReader tcpReader = new TCPReader(TCPListenPort, queue);
91		tcpReader.start();
92
93	<	// 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();
93	>	_logger.write(toString(), Logger.SYSINIT, "started");
94		}
95	<
96	<	/**
97	<	* A simple method to print the usage of this class.
98	<	* It never returns, but instead exits to the system
99	<	* with a value 1, to indicate the system did not start
100	<	* properly.
95	>
96	>	/**
97	>	* Does a dependency check. Used mainly at startup to
98	>	* see if the required dependencies (components) are up
99	>	* and running.
100	>	*
101	>	* @return a boolean value, true if the depdencies are satisfied
102		*/
103	<	public static void usage() {
104	<	System.out.println("USAGE: java FilterMain <name>");
105	<	System.out.println("WHERE <name>:");
106	<	System.out.println("      The unique identifier for the Filter in the system.");
107	<	System.exit(1);
103	>	public boolean depCheck() {
104	>	try {
105	>	org.omg.CORBA.Object obj;
106	>	// first check the ConfigurationManager is alive
107	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
108	>	// then suss out our parent filter
109	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
110	>	String parentFilterName = cp.getProperty(NAME, "Filter.parentFilter");
111	>	// finally check the parent filter is alive
112	>	obj = _refman.getCORBARef("iscream.Filter." + parentFilterName);
113	>	} catch(ComponentCORBAException e) {
114	>	System.err.println(toString() + ": Dependency Failure: "+e);
115	>	return false;
116	>	} catch(PropertyNotFoundException e) {
117	>	System.err.println(toString() + ": Unable to obtain configuration: "+e);
118	>	return false;
119	>	}
120	>	// dependency check suceeded
121	>	return true;
122		}
123	+
124	+	/**
125	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
126	+	* method to provide clean logging (every class should have this).
127	+	*
128	+	* This uses the uk.ac.ukc.iscream.util.NameFormat class
129	+	* to format the toString()
130	+	*
131	+	* @return the name of this class and its CVS revision
132	+	*/
133	+	public String toString() {
134	+	return FormatName.getName(
135	+	NAME,
136	+	getClass().getName(),
137	+	REVISION);
138	+	}
139
112	–	//---CONSTRUCTORS---
113	–
114	–	//---PUBLIC METHODS---
115	–
140		//---PRIVATE METHODS---
141
142		//---ACCESSOR/MUTATOR METHODS---
143
144		//---ATTRIBUTES---
145
146	+	/**
147	+	* This holds a reference to the
148	+	* system logger that is being used.
149	+	*/
150	+	private Logger _logger;
151	+
152	+	/**
153	+	* A reference to the reference manager in use
154	+	*/
155	+	private ReferenceManager _refman = ReferenceManager.getInstance();
156	+
157		//---STATIC ATTRIBUTES---
158
159	<	}
159	>	/**
160	>	* The friendly name for this component, used by
161	>	* all related classes.
162	>	* This is set from the configuration.
163	>	*/
164	>	public static String NAME;
165	>
166	>	}

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