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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/core/Core.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/core/Core.java (file contents):
Revision 1.8 by ajm, Thu Nov 16 15:58:11 2000 UTC vs.
Revision 1.29 by tdb, Sun Aug 1 10:40:54 2004 UTC

#	Line 1 | Line 1
1	<	//---PACKAGE DECLARATION---
2	<
3	<	//---IMPORTS---
4	<	import uk.ac.ukc.iscream.core.*;
5	<	import org.omg.CORBA.*;
6	<	import org.omg.CosNaming.*;
7	<	import org.omg.PortableServer.*;
8	<
9	<	/**
10	<	* The main class for the CORE of the I-Scream system.
11	<	* The main method of this class initialises the ORB
12	<	* and then starts and registers CORE I-Scream services
13	<	* with the name service.  At which point it essentially
14	<	* finishs its role and the started services continue to
15	<	* serve requests from the I-Scream system.
16	<	*
17	<	* @author  $Author$
18	<	* @version $Id$
19	<	*/
20	<	class Core {
21	<
22	<	//---FINAL ATTRIBUTES---
23	<
24	<	/**
25	<	* The current CVS revision of this class
26	<	*/
27	<	public static final String REVISION = "$Revision$";
28	<
29	<	//---STATIC METHODS---
30	<
31	<	/**
32	<	* The main method which starts the CORE
33	<	* Currently the args are passed direct to the ORB,
34	<	* so any ORB paramaters could go there.
35	<	*
36	<	* @param args the command line arguments
37	<	*/
38	<	public static void main(String[] args) {
39	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
40	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
41	<
42	<	System.out.println("--- I-Scream ---");
43	<
44	<	// can't have a real toString() :)
45	<	String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")";
46	<
47	<	System.out.println(toString + ": coming up");
48	<
49	<	try {
50	<	// start the ORB
51	<	ORB orb = ORB.init(args, null);
52	<
53	<	// get the Root POA
54	<	org.omg.CORBA.Object objRef = orb.resolve_initial_references("RootPOA");
55	<	POA poa = POAHelper.narrow(objRef);
56	<
57	<	// get a hook to the name service
58	<	objRef = orb.resolve_initial_references("NameService");
59	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
60	<
61	<	// start and bind each server in turn
62	<
63	<	// create the logger (either Screen or File)
64	<	ScreenLoggerServant loggerRef = new ScreenLoggerServant(3);
65	<	//FileLoggerServant loggerRef = new FileLoggerServant("core.log");
66	<	// and advertise it to the naming context
67	<	objRef = poa.servant_to_reference(loggerRef);
68	<	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
69	<
70	<	// get a ref to the logger servant as a Logger reference
71	<	Logger logRef = LoggerHelper.narrow(objRef);
72	<
73	<	// create the Configurator
74	<	ConfiguratorServant configuratorRef = new ConfiguratorServant("../configuration/", poa, logRef);
75	<
76	<	// and advertise it to the naming context
77	<	objRef = poa.servant_to_reference(configuratorRef);
78	<	ncRef.bind(ncRef.to_name("iscream.Configurator"), objRef);
79	<
80	<	// start the POA off
81	<	poa.the_POAManager().activate();
82	<
83	<	logRef.write(toString, "started");
84	<
85	<	// now we are running, we just need to serve
86	<	// so we ask the orb to block for us until it has finished
87	<	orb.run();
88	<
89	<	// if there was a problem then we'll get to here
90	<	} catch (Exception e) {
91	<
92	<	// there is already another CORE of the same name registered
93	<	if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) {
94	<	System.err.println("ERROR: Another I-Scream CORE is already registered under the same name.");
95	<
96	<	// otherwise we don't know what happened
97	<	// so print the error and do a stack trace
98	<	} else {
99	<	System.err.println("CORE ERROR: " + e);
100	<	e.printStackTrace(System.out);
101	<	}
102	<	}
103	<	}
104	<
105	<	//---CONSTRUCTORS---
106	<
107	<	//---PUBLIC METHODS---
108	<
109	<	//---PRIVATE METHODS---
110	<
111	<	//---ACCESSOR/MUTATOR METHODS---
112	<
113	<	//---ATTRIBUTES---
114	<
115	<	//---STATIC ATTRIBUTES---
116	<
117	<	}
1	>	/*
2	>	* i-scream central monitoring system
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2002 i-scream
5	>	*
6	>	* This program is free software; you can redistribute it and/or
7	>	* modify it under the terms of the GNU General Public License
8	>	* as published by the Free Software Foundation; either version 2
9	>	* of the License, or (at your option) any later version.
10	>	*
11	>	* This program is distributed in the hope that it will be useful,
12	>	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	>	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14	>	* GNU General Public License for more details.
15	>	*
16	>	* You should have received a copy of the GNU General Public License
17	>	* along with this program; if not, write to the Free Software
18	>	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19	>	*/
20	>
21	>	//---PACKAGE DECLARATION---
22	>	package uk.org.iscream.cms.server.core;
23	>
24	>	//---IMPORTS---
25	>	import uk.org.iscream.cms.util.*;
26	>	import uk.org.iscream.cms.server.componentmanager.*;
27	>
28	>	/**
29	>	* The main class for the CORE of the I-Scream system.
30	>	* This class is the component for CORE I-Scream services
31	>	* namely the Logger and the ConfigurationManager.
32	>	* It registers and starts them, at which point it essentially
33	>	* finishs its role and the started services continue to
34	>	* serve requests from the I-Scream system.
35	>	*
36	>	* @author  $Author$
37	>	* @version $Id$
38	>	*/
39	>	public class Core implements Component {
40	>
41	>	//---FINAL ATTRIBUTES---
42	>
43	>	/**
44	>	* The current CVS revision of this class
45	>	*/
46	>	public static final String REVISION = "$Revision$";
47	>
48	>	/**
49	>	* The friendly name for this component, used by
50	>	* all related classes.
51	>	*/
52	>	public static final String NAME = "Core";
53	>
54	>	//---STATIC METHODS---
55	>
56	>	//---CONSTRUCTORS---
57	>
58	>	//---PUBLIC METHODS---
59	>
60	>	/**
61	>	* This method starts the CORE
62	>	* Currently the args are passed direct to the ORB,
63	>	* so any ORB paramaters could go there.
64	>	*
65	>	*/
66	>	public void start() throws ComponentStartException {
67	>	// start and bind each server in turn
68	>
69	>	// work out which logger to use
70	>	String whichLogger = System.getProperty("uk.org.iscream.cms.server.LoggerClass");
71	>	String loggerPackage = System.getProperty("uk.org.iscream.cms.server.LoggerPackage");
72	>
73	>	// construct the relevant LoggerImpl
74	>	LoggerImpl loggerImplRef = null;
75	>	try {
76	>	loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance();
77	>	} catch (Exception e) {
78	>	// if anything goes wrong we throw a failed start exception
79	>	throw new ComponentStartException("unable to load logging class");
80	>	}
81	>
82	>	// setup and bind the LoggerServant
83	>	LoggerServant loggerRef = new LoggerServant(loggerImplRef);
84	>	_refman.bindToOrb(loggerRef, "iscream.Logger");
85	>
86	>	// get a reference to the servant as a Logger
87	>	_logger = _refman.getLogger();
88	>
89	>	// create the Configurator
90	>	ConfigurationManagerServant configManRef = new ConfigurationManagerServant();
91	>
92	>	// and advertise it to the naming context
93	>	_refman.bindToOrb(configManRef, "iscream.ConfigurationManager");
94	>
95	>	_logger.write(toString(), Logger.SYSINIT, "started");
96	>	}
97	>
98	>	/**
99	>	* Does a dependency check. Used mainly at startup to
100	>	* see if the required dependencies (components) are up
101	>	* and running.
102	>	*
103	>	* @return a boolean value, true if the depdencies are satisfied
104	>	*/
105	>	public boolean depCheck() {
106	>	// the core has no depedencies
107	>	return true;
108	>	}
109	>
110	>	/**
111	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
112	>	* method to provide clean logging (every class should have this).
113	>	*
114	>	* This uses the uk.org.iscream.cms.util.NameFormat class
115	>	* to format the toString()
116	>	*
117	>	* @return the name of this class and its CVS revision
118	>	*/
119	>	public String toString() {
120	>	return FormatName.getName(
121	>	_name,
122	>	getClass().getName(),
123	>	REVISION);
124	>	}
125	>
126	>	//---PRIVATE METHODS---
127	>
128	>	//---ACCESSOR/MUTATOR METHODS---
129	>
130	>	//---ATTRIBUTES---
131	>
132	>	/**
133	>	* This is the friendly identifier of the
134	>	* component this class is running in.
135	>	* eg, a Filter may be called "filter1",
136	>	* If this class does not have an owning
137	>	* component,  a name from the configuration
138	>	* can be placed here.  This name could also
139	>	* be changed to null for utility classes.
140	>	*/
141	>	private String _name = Core.NAME;
142	>
143	>	/**
144	>	* This holds a reference to the
145	>	* system logger that is being used.
146	>	*/
147	>	private Logger _logger;
148	>
149	>	/**
150	>	* A reference to the reference manager in use
151	>	*/
152	>	private ReferenceManager _refman = ReferenceManager.getInstance();
153	>
154	>	//---STATIC ATTRIBUTES---
155	>
156	>	}

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