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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 1.8 by ajm, Mon Dec 4 18:12:13 2000 UTC vs.
Revision 1.35 by tdb, Fri Mar 23 04:57:09 2001 UTC

#	Line 1 | Line 1
1	+
2		//---PACKAGE DECLARATION---
3	<	package uk.ac.ukc.iscream.rootfilter;
3	>	package uk.org.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.clientinterface.*;
6	>	import uk.org.iscream.util.*;
7	>	import uk.org.iscream.core.*;
8	>	import uk.org.iscream.componentmanager.*;
9	>	import uk.org.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 RootFilterMain {
22	>	public class RootFilter implements Component {
23
24		//---FINAL ATTRIBUTES---
25
#	Line 20 | Line 27 | class RootFilterMain {
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) {
27	<	// ***************************************
28	<	// VERY TEMPORARY - will find a better way
29	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
30	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
31	<	// ***************************************
33	>	//---CONSTRUCTORS---
34
35	<	ReferenceManager refman = ReferenceManager.init(null, null);
34	<
35	<	// can't have a real toString() :)
36	<	String toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
35	>	//---PUBLIC METHODS---
36
37	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
38	<
39	<	// configuration variables we require
40	<	String ourName = null;
41	<	String realInterface = null;
42	<	String dbInterface = null;
37	>	/**
38	>	* This starts the Root Filter for the system
39	>	*/
40	>	public void start() throws ComponentStartException {
41	>	// get references to key objects
42	>	_logger = _refman.getLogger();
43
44	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
45	<	if (config == null) {
46	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
47	<	"         Advise you check the i-scream log for more information.");
48	<	} else {
49	<	try {
50	<	ourName = config.getProperty("RootFilter.name");
51	<	realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
52	<	dbInterface = config.getProperty("RootFilter.dbInterfaceName");
53	<	} catch (org.omg.CORBA.MARSHAL e) {
54	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
56	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
57	<	"         Advise you check the i-scream log for more information.");
58	<
59	<	}
44	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
45	>
46	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
47	>	String configName = "RootFilter";
48	>
49	>	// set the name of the root filter
50	>	try {
51	>	NAME = cp.getProperty(configName, "RootFilter.name");
52	>	} catch (PropertyNotFoundException e) {
53	>	NAME = null;
54	>	_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e);
55		}
56	<	// now we have the name of the Root Filter we set it
57	<	refman.setName(ourName);
58	<	toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
59	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
60	<
56	>
57	>	// try and get the names of the ciReal and ciDB
58	>	String realInterface, dbInterface;
59	>	try {
60	>	realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName");
61	>	dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName");
62	>	} catch (PropertyNotFoundException e) {
63	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
64	>	realInterface = null;
65	>	dbInterface = null;
66	>	}
67	>
68	>	ClientInterface ciReal = null, ciDB = null;
69		// get reference to the client interfaces - the real time one
70	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + realInterface));
71	<	// - the db one ... but it's not done yet
72	<	//ClientInterface ciDB = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + dbInterface));
73	<	// so for the time being we null it.
74	<	ClientInterface ciDB = null;
75	<	refman.getLogger().write(toString, Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
70	>	if (realInterface != null) {
71	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
72	>	}
73	>	// get reference to the client interfaces - and the db one
74	>	if (dbInterface != null) {
75	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
76	>	}
77
78	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
78	>	// setup a queue
79	>	Queue queue;
80	>	// see if this Queue needs a size limit
81	>	try {
82	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
83	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
84	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
85	>	if(algorithm != -1) {
86	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
87	>	// we have valid values, so lets start it.
88	>	queue = new Queue(queueSizeLimit, algorithm);
89	>	}
90	>	else {
91	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
92	>	// just don't activate a limit
93	>	queue = new Queue();
94	>	}
95	>
96	>	} catch (PropertyNotFoundException e) {
97	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
98	>	// just don't activate a limit
99	>	queue = new Queue();
100	>	} catch (NumberFormatException e) {
101	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
102	>	// just don't activate a limit
103	>	queue = new Queue();
104	>	}
105
106	+	// startup a monitor on this queue
107	+	try {
108	+	// try to get the interval, if this fails, we won't start up the monitor
109	+	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
110	+	String queueName = NAME + " RootFilter";
111	+	queue.startMonitor(queueMonitorInterval*1000, queueName);
112	+	} catch (PropertyNotFoundException e) {
113	+	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
114	+	}
115	+
116	+	if (realInterface == null) {
117	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
118	+	CIWrapper c = new CIWrapper(ciDB, queue);
119	+	c.start();
120	+	} else if (dbInterface == null) {
121	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
122	+	CIWrapper c = new CIWrapper(ciReal, queue);
123	+	c.start();
124	+	} else {
125	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
126	+	CIWrapper c = new CIWrapper(ciReal, queue);
127	+	c.start();
128	+	c = new CIWrapper(ciDB, queue);
129	+	c.start();
130	+	}
131	+
132		// RootFilterServant start (for inbound child filter data)
133	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
134	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
133	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
134	>	RootFilterServant filterServant = new RootFilterServant(queue);
135		// bind to the naming service as a filter
136	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
136	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
137
138	<	// start the POA off
139	<	// now we are running, we just need to serve
84	<	// so we ask the orb to block for us until it has finished
85	<	refman.activatePOA();
86	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
87	<	refman.getORB().run();
138	>	_logger.write(toString(), Logger.SYSINIT, "started");
139	>
140		}
141	<
142	<	/**
143	<	* A simple method to print the usage of this class.
144	<	* It never returns, but instead exits to the system
145	<	* with a value 1, to indicate the system did not start
146	<	* properly.
141	>
142	>	/**
143	>	* Does a dependency check. Used mainly at startup to
144	>	* see if the required dependencies (components) are up
145	>	* and running.
146	>	*
147	>	* @return a boolean value, true if the depdencies are satisfied
148		*/
149	<	public static void usage() {
150	<	System.out.println("USAGE: java FilterMain <name>");
151	<	System.out.println("WHERE <name>:");
152	<	System.out.println("      The unique identifier for the Filter in the system.");
153	<	System.exit(1);
149	>	public boolean depCheck() {
150	>	org.omg.CORBA.Object obj;
151	>
152	>	// first we need to check the Configuration system is available
153	>	try {
154	>	// first check the ConfigurationManager is alive
155	>	obj = _refman.getCORBARef("iscream.ConfigurationManager");
156	>	} catch(ComponentCORBAException e) {
157	>	System.err.println(toString() + ": Dependency Failure: "+e);
158	>	return false;
159	>	}
160	>
161	>	// next we need to check which client interfaces *should*
162	>	// be active, and check them. Note they do not have to
163	>	// be enabled, and we should check this.
164	>	// -- each check only forces a dependency if it's configured
165	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
166	>	// first check the client interface
167	>	try {
168	>	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
169	>	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
170	>	} catch(ComponentCORBAException e) {
171	>	System.err.println(toString() + ": Dependency Failure: "+e);
172	>	return false;
173	>	} catch(PropertyNotFoundException e) {
174	>	System.err.println(toString() + ": Client interface not configured and thus not enabled.");
175	>	}
176	>	// second check the database interface
177	>	try {
178	>	String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName");
179	>	obj = _refman.getCORBARef("iscream.ClientInterface." + dbi);
180	>	} catch(ComponentCORBAException e) {
181	>	System.err.println(toString() + ": Dependency Failure: "+e);
182	>	return false;
183	>	} catch(PropertyNotFoundException e) {
184	>	System.err.println(toString() + ": Database interface not configured and thus not enabled.");
185	>	}
186	>
187	>	// dependency check suceeded
188	>	return true;
189		}
190	+
191	+	/**
192	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
193	+	* method to provide clean logging (every class should have this).
194	+	*
195	+	* This uses the uk.org.iscream.util.NameFormat class
196	+	* to format the toString()
197	+	*
198	+	* @return the name of this class and its CVS revision
199	+	*/
200	+	public String toString() {
201	+	return FormatName.getName(
202	+	NAME,
203	+	getClass().getName(),
204	+	REVISION);
205	+	}
206
103	–	//---CONSTRUCTORS---
104	–
105	–	//---PUBLIC METHODS---
106	–
207		//---PRIVATE METHODS---
208
209		//---ACCESSOR/MUTATOR METHODS---
210
211		//---ATTRIBUTES---
212
213	+	/**
214	+	* This holds a reference to the
215	+	* system logger that is being used.
216	+	*/
217	+	private Logger _logger;
218	+
219	+	/**
220	+	* A reference to the reference manager in use
221	+	*/
222	+	private ReferenceManager _refman = ReferenceManager.getInstance();
223	+
224		//---STATIC ATTRIBUTES---
225	+
226	+	/**
227	+	* The friendly name for this component, used by
228	+	* all related classes.
229	+	* This is set from the configuration.
230	+	*/
231	+	public static String NAME;
232
233		}

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