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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 1.25 by tdb, Tue May 29 17:02:34 2001 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	>	//---PACKAGE DECLARATION---
2	>	package uk.org.iscream.cms.server.core;
3	>
4	>	//---IMPORTS---
5	>	import uk.org.iscream.cms.server.util.*;
6	>	import uk.org.iscream.cms.server.componentmanager.*;
7	>
8	>	/**
9	>	* The main class for the CORE of the I-Scream system.
10	>	* This class is the component for CORE I-Scream services
11	>	* namely the Logger and the ConfigurationManager.
12	>	* It registers and starts them, at which point it essentially
13	>	* finishs its role and the started services continue to
14	>	* serve requests from the I-Scream system.
15	>	*
16	>	* @author  $Author$
17	>	* @version $Id$
18	>	*/
19	>	public class Core implements Component {
20	>
21	>	//---FINAL ATTRIBUTES---
22	>
23	>	/**
24	>	* The current CVS revision of this class
25	>	*/
26	>	public static final String REVISION = "$Revision$";
27	>
28	>	/**
29	>	* The friendly name for this component, used by
30	>	* all related classes.
31	>	*/
32	>	public static final String NAME = "Core";
33	>
34	>	//---STATIC METHODS---
35	>
36	>	//---CONSTRUCTORS---
37	>
38	>	//---PUBLIC METHODS---
39	>
40	>	/**
41	>	* This method starts the CORE
42	>	* Currently the args are passed direct to the ORB,
43	>	* so any ORB paramaters could go there.
44	>	*
45	>	*/
46	>	public void start() throws ComponentStartException {
47	>	// start and bind each server in turn
48	>
49	>	// work out which logger to use
50	>	String whichLogger = System.getProperty("uk.org.iscream.cms.server.LoggerClass");
51	>	String loggerPackage = System.getProperty("uk.org.iscream.cms.server.LoggerPackage");
52	>
53	>	// construct the relevant LoggerImpl
54	>	LoggerImpl loggerImplRef = null;
55	>	try {
56	>	loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance();
57	>	} catch (Exception e) {
58	>	// if anything goes wrong we throw a failed start exception
59	>	throw new ComponentStartException("unable to load logging class");
60	>	}
61	>
62	>	// setup and bind the LoggerServant
63	>	LoggerServant loggerRef = new LoggerServant(loggerImplRef);
64	>	_refman.bindToOrb(loggerRef, "iscream.Logger");
65	>
66	>	// get a reference to the servant as a Logger
67	>	_logger = _refman.getLogger();
68	>
69	>	// create the Configurator
70	>	ConfigurationManagerServant configManRef = new ConfigurationManagerServant();
71	>
72	>	// and advertise it to the naming context
73	>	_refman.bindToOrb(configManRef, "iscream.ConfigurationManager");
74	>
75	>	_logger.write(toString(), Logger.SYSINIT, "started");
76	>	}
77	>
78	>	/**
79	>	* Does a dependency check. Used mainly at startup to
80	>	* see if the required dependencies (components) are up
81	>	* and running.
82	>	*
83	>	* @return a boolean value, true if the depdencies are satisfied
84	>	*/
85	>	public boolean depCheck() {
86	>	// the core has no depedencies
87	>	return true;
88	>	}
89	>
90	>	/**
91	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
92	>	* method to provide clean logging (every class should have this).
93	>	*
94	>	* This uses the uk.org.iscream.cms.server.util.NameFormat class
95	>	* to format the toString()
96	>	*
97	>	* @return the name of this class and its CVS revision
98	>	*/
99	>	public String toString() {
100	>	return FormatName.getName(
101	>	_name,
102	>	getClass().getName(),
103	>	REVISION);
104	>	}
105	>
106	>	//---PRIVATE METHODS---
107	>
108	>	//---ACCESSOR/MUTATOR METHODS---
109	>
110	>	//---ATTRIBUTES---
111	>
112	>	/**
113	>	* This is the friendly identifier of the
114	>	* component this class is running in.
115	>	* eg, a Filter may be called "filter1",
116	>	* If this class does not have an owning
117	>	* component,  a name from the configuration
118	>	* can be placed here.  This name could also
119	>	* be changed to null for utility classes.
120	>	*/
121	>	private String _name = Core.NAME;
122	>
123	>	/**
124	>	* This holds a reference to the
125	>	* system logger that is being used.
126	>	*/
127	>	private Logger _logger;
128	>
129	>	/**
130	>	* A reference to the reference manager in use
131	>	*/
132	>	private ReferenceManager _refman = ReferenceManager.getInstance();
133	>
134	>	//---STATIC ATTRIBUTES---
135	>
136	>	}

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