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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 1.9 by tdb, Thu Nov 16 18:00:36 2000 UTC vs.
Revision 1.16 by ajm, Wed Nov 29 21:27:08 2000 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(Logger.SYSINIT);
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, Logger.SYSINIT, "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.ac.ukc.iscream.core;
3	>
4	>	//---IMPORTS---
5	>	import org.omg.CORBA.*;
6	>	import org.omg.CosNaming.*;
7	>	import org.omg.PortableServer.*;
8	>	import java.util.*;
9	>	import java.io.*;
10	>
11	>	/**
12	>	* The main class for the CORE of the I-Scream system.
13	>	* The main method of this class initialises the ORB
14	>	* and then starts and registers CORE I-Scream services
15	>	* with the name service.  At which point it essentially
16	>	* finishs its role and the started services continue to
17	>	* serve requests from the I-Scream system.
18	>	*
19	>	* @author  $Author$
20	>	* @version $Id$
21	>	*/
22	>	class Core {
23	>
24	>	//---FINAL ATTRIBUTES---
25	>
26	>	/**
27	>	* The current CVS revision of this class
28	>	*/
29	>	public static final String REVISION = "$Revision$";
30	>
31	>	/**
32	>	* The toString() of this class
33	>	* As it won't be instatiated, this is needed.
34	>	*/
35	>	public static final String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")";
36	>
37	>	/**
38	>	* The default location of the properties file for the system
39	>	*/
40	>	public static final String DEFAULTPROPERTIES = "default.properties";
41	>
42	>	//---STATIC METHODS---
43	>
44	>	/**
45	>	* The main method which starts the CORE
46	>	* Currently the args are passed direct to the ORB,
47	>	* so any ORB paramaters could go there.
48	>	*
49	>	* @param args the command line arguments
50	>	*/
51	>	public static void main(String[] args) {
52	>	System.out.println("--- I-Scream ---");
53	>
54	>	// get the command line args
55	>	String defaultProperties = DEFAULTPROPERTIES;
56	>	if (args.length > 0) {
57	>	if (args[0].equals("-l")) {
58	>	defaultProperties = args[1];
59	>	} else if (args[0].equals("-h")) {
60	>	usage();
61	>	} else {
62	>	usage();
63	>	}
64	>	}
65	>
66	>	// load the default properties file into the system properties
67	>	System.out.println(toString + ": initialising - using " + defaultProperties);
68	>	try {
69	>	Properties initProperties = new Properties(System.getProperties());
70	>	initProperties.load(new FileInputStream(new File(defaultProperties)));
71	>	System.setProperties(initProperties);
72	>
73	>
74	>	} catch (Exception e) {
75	>	System.err.println(toString + ": ERROR " + e.getMessage());
76	>	usage();
77	>	}
78	>
79	>	// continue to bring the system up
80	>	System.out.println(toString + ": coming up");
81	>	try {
82	>	// start the ORB
83	>	ORB orb = ORB.init(args, null);
84	>
85	>	// get the Root POA
86	>	org.omg.CORBA.Object objRef = orb.resolve_initial_references("RootPOA");
87	>	POA poa = POAHelper.narrow(objRef);
88	>
89	>	// get a hook to the name service
90	>	objRef = orb.resolve_initial_references("NameService");
91	>	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
92	>
93	>	// check we got it
94	>	if (ncRef == null) {
95	>	throw new Exception("Unable to locate CORBA Naming Service for configured ORB!");
96	>	}
97	>
98	>	// start and bind each server in turn
99	>
100	>	// work out which logger to use
101	>	String whichLogger = System.getProperty("uk.ac.ukc.iscream.LoggerClass");
102	>	String loggerPackage = System.getProperty("uk.ac.ukc.iscream.LoggerPackage");
103	>
104	>	// construct the relevant LoggerImpl
105	>	LoggerImpl loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance();
106	>
107	>	// setup and bind the LoggerServant
108	>	LoggerServant loggerRef = new LoggerServant(loggerImplRef);
109	>	objRef = poa.servant_to_reference(loggerRef);
110	>	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
111	>
112	>	// get a reference to the servant as a Logger
113	>	Logger logRef = LoggerHelper.narrow(objRef);
114	>
115	>	// create the Configurator
116	>	ConfigurationManagerServant configManRef = new ConfigurationManagerServant(poa, logRef);
117	>
118	>	// and advertise it to the naming context
119	>	objRef = poa.servant_to_reference(configManRef);
120	>	ncRef.bind(ncRef.to_name("iscream.ConfigurationManager"), objRef);
121	>
122	>	// start the POA off
123	>	poa.the_POAManager().activate();
124	>
125	>	logRef.write(toString, Logger.SYSINIT, "started");
126	>
127	>	// now we are running, we just need to serve
128	>	// so we ask the orb to block for us until it has finished
129	>	orb.run();
130	>
131	>	// if there was a problem then we'll get to here
132	>	} catch (Exception e) {
133	>
134	>	// there is already another CORE of the same name registered
135	>	if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) {
136	>	System.err.println("CORE ERROR: Another I-Scream CORE is already registered under the same name.");
137	>
138	>	// otherwise we don't know what happened
139	>	// so print the error and do a stack trace if debug is enabled
140	>	} else {
141	>	System.err.println("CORE ERROR: " + e.getMessage());
142	>	if (Integer.parseInt(System.getProperty("uk.ac.ukc.iscream.Verbosity")) == Logger.DEBUG) {
143	>	System.err.println("*** DEBUG ENABLED - printing stack trace ***");
144	>	e.printStackTrace(System.out);
145	>	}
146	>	}
147	>	}
148	>	}
149	>
150	>	/**
151	>	* A simple method to print the usage of this class.
152	>	* It never returns, but instead exits to the system
153	>	* with a value 1, to indicate the system did not start
154	>	* properly.
155	>	*/
156	>	public static void usage() {
157	>	System.out.println("USAGE: java Core <option>");
158	>	System.out.println("WHERE <option>:");
159	>	System.out.println("      -l <filename> - the location of initial system properties");
160	>	System.out.println("      -h            - this help screen");
161	>	System.exit(1);
162	>	}
163	>
164	>	//---CONSTRUCTORS---
165	>
166	>	//---PUBLIC METHODS---
167	>
168	>	//---PRIVATE METHODS---
169	>
170	>	//---ACCESSOR/MUTATOR METHODS---
171	>
172	>	//---ATTRIBUTES---
173	>
174	>	//---STATIC ATTRIBUTES---
175	>
176	>	}

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