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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 1.14 by ajm, Mon Nov 20 21:10:09 2000 UTC vs.
Revision 1.17 by ajm, Mon Dec 11 16:40:28 2000 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	+	package uk.ac.ukc.iscream.core;
3
4		//---IMPORTS---
5	<	import uk.ac.ukc.iscream.core.*;
6	<	import org.omg.CORBA.*;
5	>	import uk.ac.ukc.iscream.util.ReferenceManager;
6	>
7	>	import org.omg.CORBA.ORB;
8		import org.omg.CosNaming.*;
9		import org.omg.PortableServer.*;
10	<	import java.util.*;
9	<	import java.io.*;
10	>	import uk.ac.ukc.iscream.core.*;
11
12		/**
13		* The main class for the CORE of the I-Scream system.
#	Line 19 | Line 20 | import java.io.*;
20		* @author  $Author$
21		* @version $Id$
22		*/
23	<	class Core {
23	>	public class Core implements uk.ac.ukc.iscream.util.Component {
24
25		//---FINAL ATTRIBUTES---
26
#	Line 41 | Line 42 | class Core {
42
43		//---STATIC METHODS---
44
45	+	//---CONSTRUCTORS---
46	+
47	+	//---PUBLIC METHODS---
48	+
49		/**
50		* The main method which starts the CORE
51		* Currently the args are passed direct to the ORB,
#	Line 48 | Line 53 | class Core {
53		*
54		* @param args the command line arguments
55		*/
56	<	public static void main(String[] args) {
57	<	System.out.println("--- I-Scream ---");
58	<
59	<	// get the command line args
60	<	String defaultProperties = DEFAULTPROPERTIES;
61	<	if (args.length > 0) {
62	<	if (args[0].equals("-l")) {
63	<	defaultProperties = args[1];
64	<	} 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);
56	>	public boolean start() {
57	>	// start and bind each server in turn
58	>
59	>	// work out which logger to use
60	>	String whichLogger = System.getProperty("uk.ac.ukc.iscream.LoggerClass");
61	>	String loggerPackage = System.getProperty("uk.ac.ukc.iscream.LoggerPackage");
62	>
63	>	// construct the relevant LoggerImpl
64	>	LoggerImpl loggerImplRef = null;
65		try {
66	<	Properties initProperties = new Properties(System.getProperties());
70	<	initProperties.load(new FileInputStream(new File(defaultProperties)));
71	<	System.setProperties(initProperties);
72	<
73	<
66	>	loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance();
67		} catch (Exception e) {
68	<	System.err.println(toString + ": ERROR " + e.getMessage());
69	<	usage();
68	>	System.err.println(toString + ": ERROR Unable to start Logger - " + e.getMessage());
69	>	// so return false to indicate failure
70	>	return false;
71		}
72	+
73	+	// setup and bind the LoggerServant
74	+	LoggerServant loggerRef = new LoggerServant(loggerImplRef);
75	+	_refman.bindToOrb(loggerRef, "iscream.Logger");
76
77	<	// continue to bring the system up
78	<	System.out.println(toString + ": coming up");
79	<	try {
80	<	// start the ORB
81	<	ORB orb = ORB.init(args, null);
82	<
83	<	// get the Root POA
84	<	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", defaultLogger);
102	<
103	<	// construct the relevant LoggerImpl
104	<	LoggerImpl loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(whichLogger).newInstance();
105	<
106	<	// setup and bind the LoggerServant
107	<	LoggerServant loggerRef = new LoggerServant(loggerImplRef);
108	<	objRef = poa.servant_to_reference(loggerRef);
109	<	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
110	<
111	<	// get a reference to the servant as a Logger
112	<	Logger logRef = LoggerHelper.narrow(objRef);
77	>	// get a reference to the servant as a Logger
78	>	_logger = _refman.getLogger();
79	>
80	>	// create the Configurator
81	>	ConfigurationManagerServant configManRef = new ConfigurationManagerServant(_refman.getRootPOA(), _refman.getLogger());
82	>
83	>	// and advertise it to the naming context
84	>	_refman.bindToOrb(configManRef, "iscream.ConfigurationManager");
85
86	<	// create the Configurator
87	<	ConfigurationManagerServant configManRef = new ConfigurationManagerServant(poa, logRef);
88	<
89	<	// and advertise it to the naming context
118	<	objRef = poa.servant_to_reference(configManRef);
119	<	ncRef.bind(ncRef.to_name("iscream.ConfigurationManager"), objRef);
120	<
121	<	// start the POA off
122	<	poa.the_POAManager().activate();
123	<
124	<	logRef.write(toString, Logger.SYSINIT, "started");
125	<
126	<	// now we are running, we just need to serve
127	<	// so we ask the orb to block for us until it has finished
128	<	orb.run();
129	<
130	<	// if there was a problem then we'll get to here
131	<	} catch (Exception e) {
132	<
133	<	// there is already another CORE of the same name registered
134	<	if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) {
135	<	System.err.println("CORE ERROR: Another I-Scream CORE is already registered under the same name.");
136	<
137	<	// otherwise we don't know what happened
138	<	// so print the error and do a stack trace if debug is enabled
139	<	} else {
140	<	System.err.println("CORE ERROR: " + e.getMessage());
141	<	if (Integer.parseInt(System.getProperty("uk.ac.ukc.iscream.Verbosity")) == Logger.DEBUG) {
142	<	System.err.println("*** DEBUG ENABLED - printing stack trace ***");
143	<	e.printStackTrace(System.out);
144	<	}
145	<	}
146	<	}
86	>	_logger.write(toString, Logger.SYSINIT, "started");
87	>
88	>	// we were ok starting...
89	>	return true;
90		}
148	–
149	–	/**
150	–	* A simple method to print the usage of this class.
151	–	* It never returns, but instead exits to the system
152	–	* with a value 1, to indicate the system did not start
153	–	* properly.
154	–	*/
155	–	public static void usage() {
156	–	System.out.println("USAGE: java Core.java <option>");
157	–	System.out.println("WHERE <option>:");
158	–	System.out.println("      -l <filename> - the location of initial system properties");
159	–	System.out.println("      -h            - this help screen");
160	–	System.exit(1);
161	–	}
91
163	–	//---CONSTRUCTORS---
164	–
165	–	//---PUBLIC METHODS---
166	–
92		//---PRIVATE METHODS---
93
94		//---ACCESSOR/MUTATOR METHODS---
95
96		//---ATTRIBUTES---
97
98	<	//---STATIC ATTRIBUTES---
99	<
175	<	/**
176	<	* Default logger, to be used when one is not provided
177	<	* in the configuration.
178	<	*/
179	<	private static final String defaultLogger = "ScreenLogger";
98	>	Logger _logger;
99	>	ReferenceManager _refman = ReferenceManager.getInstance();
100
101	<	/**
182	<	* Default configPath, to be used when one is not provided
183	<	* in the configuration.
184	<	*/
185	<	private static final String defaultConfigPath = ".";
101	>	//---STATIC ATTRIBUTES---
102
103		}

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