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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/rootfilter/RootFilter.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/rootfilter/RootFilter.java (file contents):
Revision 1.5 by ajm, Thu Nov 30 03:06:39 2000 UTC vs.
Revision 1.29 by tdb, Wed Mar 14 01:34:34 2001 UTC

#	Line 1 | Line 1
1	+
2		//---PACKAGE DECLARATION---
3		package uk.ac.ukc.iscream.rootfilter;
4
5		//---IMPORTS---
6		import uk.ac.ukc.iscream.util.*;
7		import uk.ac.ukc.iscream.core.*;
8	+	import uk.ac.ukc.iscream.componentmanager.*;
9	+	import uk.ac.ukc.iscream.clientinterface.*;
10
11		/**
12	<	* A Filter Startup Class
12	>	* The root filter is what all filters talk to
13	>	* Hosts cannot talk to this implementation of a filter.
14	>	* It provides hooks to all data interfaces for the system
15	>	* namely the client interface and the db interface.
16	>	* This is an i-scream component that starts the
17	>	* RootFilter services.
18		*
19		* @author  $Author$
20		* @version $Id$
21		*/
22	<	class FilterMain {
22	>	public class RootFilter implements Component {
23
24		//---FINAL ATTRIBUTES---
25
#	Line 19 | Line 27 | class FilterMain {
27		* The current CVS revision of this class
28		*/
29		public static final String REVISION = "$Revision$";
30	<
30	>
31		//---STATIC METHODS---
32
33	<	public static void main(String[] args) {
26	<	// ***************************************
27	<	// VERY TEMPORARY - will find a better way
28	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
29	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
30	<	// ***************************************
33	>	//---CONSTRUCTORS---
34
35	<	ReferenceManager refman = ReferenceManager.init(null, null);
35	>	//---PUBLIC METHODS---
36	>
37	>	/**
38	>	* This starts the Root Filter for the system
39	>	*/
40	>	public void start() throws ComponentStartException {
41	>	// get references to key objects
42	>	_refman = ReferenceManager.getInstance();
43	>	_logger = ReferenceManager.getInstance().getLogger();
44
45	<	// can't have a real toString() :)
46	<	String toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
45	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
46	>
47	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
48	>	String configName = "RootFilter";
49	>
50	>	// set the name of the root filter
51	>	try {
52	>	NAME = cp.getProperty(configName, "RootFilter.name");
53	>	} catch (PropertyNotFoundException e) {
54	>	NAME = null;
55	>	_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e);
56	>	}
57	>
58	>	// try and get the names of the ciReal and ciDB
59	>	String realInterface, dbInterface;
60	>	try {
61	>	realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName");
62	>	dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName");
63	>	} catch (PropertyNotFoundException e) {
64	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
65	>	realInterface = null;
66	>	dbInterface = null;
67	>	}
68	>
69	>	ClientInterface ciReal = null, ciDB = null;
70	>	// get reference to the client interfaces - the real time one
71	>	if (realInterface != null) {
72	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
73	>	}
74	>	// get reference to the client interfaces - and the db one
75	>	if (dbInterface != null) {
76	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
77	>	}
78
79	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
80	<
39	<	// configuration variables we require
40	<	String ourName = null;
79	>	// setup a queue
80	>	Queue queue = new Queue();
81
82	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
83	<	if (config == null) {
84	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
85	<	"         Advise you check the i-scream log for more information.");
82	>	// startup a monitor on this queue
83	>	try {
84	>	// try to get the interval, if this fails, we won't start up the monitor
85	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
86	>	String queueName = NAME + " RootFilter";
87	>	queue.startMonitor(queueMonitorInterval*1000, queueName);
88	>	} catch (PropertyNotFoundException e) {
89	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
90	>	}
91	>
92	>	if (realInterface == null) {
93	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
94	>	CIWrapper c = new CIWrapper(ciDB, queue);
95	>	c.start();
96	>	} else if (dbInterface == null) {
97	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
98	>	CIWrapper c = new CIWrapper(ciReal, queue);
99	>	c.start();
100		} else {
101	<	try {
102	<	ourName = config.getProperty("Filter.rootFilter");
103	<	} catch (org.omg.CORBA.MARSHAL e) {
104	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
105	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
52	<	"         Advise you check the i-scream log for more information.");
53	<
54	<	}
101	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
102	>	CIWrapper c = new CIWrapper(ciReal, queue);
103	>	c.start();
104	>	c = new CIWrapper(ciDB, queue);
105	>	c.start();
106		}
107	<	// now we have the name of the Root Filter we set it
108	<	refman.setName(ourName);
109	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
107	>
108	>	// RootFilterServant start (for inbound child filter data)
109	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
110	>	RootFilterServant filterServant = new RootFilterServant(queue);
111	>	// bind to the naming service as a filter
112	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
113
114	<	// FilterServant start (for inbound child filter data)
61	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
62	<	RootFilterServant filterServant = new RootFilterServant();
63	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
114	>	_logger.write(toString(), Logger.SYSINIT, "started");
115
65	–	// start the POA off
66	–	// now we are running, we just need to serve
67	–	// so we ask the orb to block for us until it has finished
68	–	refman.activatePOA();
69	–	refman.getLogger().write(toString, Logger.SYSINIT, "started");
70	–	refman.getORB().run();
116		}
117	<
118	<	/**
119	<	* A simple method to print the usage of this class.
120	<	* It never returns, but instead exits to the system
121	<	* with a value 1, to indicate the system did not start
122	<	* properly.
117	>
118	>	/**
119	>	* Does a dependency check. Used mainly at startup to
120	>	* see if the required dependencies (components) are up
121	>	* and running.
122	>	*
123	>	* @return a boolean value, true if the depdencies are satisfied
124		*/
125	<	public static void usage() {
126	<	System.out.println("USAGE: java FilterMain <name>");
127	<	System.out.println("WHERE <name>:");
128	<	System.out.println("      The unique identifier for the Filter in the system.");
129	<	System.exit(1);
125	>	public boolean depCheck() {
126	>	try {
127	>	org.omg.CORBA.Object obj;
128	>	// first check the ConfigurationManager is alive
129	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
130	>	// then get some info on the CLI and DBI
131	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
132	>	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
133	>	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
134	>	// finally check the CLI and DBI are alive
135	>	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
136	>	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
137	>	} catch(ComponentCORBAException e) {
138	>	_logger.write(toString(), Logger.WARNING, "Dependency Failure: "+e);
139	>	return false;
140	>	} catch(PropertyNotFoundException e) {
141	>	_logger.write(toString(), Logger.WARNING, "Unable to obtain configuration: "+e);
142	>	return false;
143	>	}
144	>	// dependency check suceeded
145	>	return true;
146		}
147	+
148	+	/**
149	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
150	+	* method to provide clean logging (every class should have this).
151	+	*
152	+	* This uses the uk.ac.ukc.iscream.util.NameFormat class
153	+	* to format the toString()
154	+	*
155	+	* @return the name of this class and its CVS revision
156	+	*/
157	+	public String toString() {
158	+	return FormatName.getName(
159	+	NAME,
160	+	getClass().getName(),
161	+	REVISION);
162	+	}
163
86	–	//---CONSTRUCTORS---
87	–
88	–	//---PUBLIC METHODS---
89	–
164		//---PRIVATE METHODS---
165
166		//---ACCESSOR/MUTATOR METHODS---
167
168		//---ATTRIBUTES---
169
170	+	/**
171	+	* This holds a reference to the
172	+	* system logger that is being used.
173	+	*/
174	+	private Logger _logger;
175	+
176	+	/**
177	+	* A reference to the reference manager in use
178	+	*/
179	+	private ReferenceManager _refman;
180	+
181		//---STATIC ATTRIBUTES---
182	+
183	+	/**
184	+	* The friendly name for this component, used by
185	+	* all related classes.
186	+	* This is set from the configuration.
187	+	*/
188	+	public static String NAME;
189
190		}

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