server/core/Core.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.core;

//---IMPORTS---
import uk.ac.ukc.iscream.util.ReferenceManager;

import org.omg.CORBA.ORB;
import org.omg.CosNaming.*;
import org.omg.PortableServer.*;
import uk.ac.ukc.iscream.core.*;

/**
 * The main class for the CORE of the I-Scream system.
 * The main method of this class initialises the ORB
 * and then starts and registers CORE I-Scream services
 * with the name service.  At which point it essentially
 * finishs its role and the started services continue to
 * serve requests from the I-Scream system.
 *
 * @author  $Author: ajm4 $
 * @version $Id: Core.java,v 1.16 2000/11/29 21:27:08 ajm4 Exp $
 */
public class Core implements uk.ac.ukc.iscream.util.Component {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.16 $";
    
    /**
     * The toString() of this class
     * As it won't be instatiated, this is needed.
     */
    public static final String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")";
    
    /**
     * The default location of the properties file for the system
     */
    public static final String DEFAULTPROPERTIES = "default.properties";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    /**
     * The main method which starts the CORE
     * Currently the args are passed direct to the ORB,
     * so any ORB paramaters could go there.
     *
     * @param args the command line arguments
     */
    public boolean start() {
        // start and bind each server in turn
        
        // work out which logger to use
        String whichLogger = System.getProperty("uk.ac.ukc.iscream.LoggerClass");
        String loggerPackage = System.getProperty("uk.ac.ukc.iscream.LoggerPackage");
       
        // construct the relevant LoggerImpl
        LoggerImpl loggerImplRef = null;
        try {
            loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance();
        } catch (Exception e) {
            System.err.println(toString + ": ERROR Unable to start Logger - " + e.getMessage());
            // so return false to indicate failure
            return false;
        }
        
        // setup and bind the LoggerServant
        LoggerServant loggerRef = new LoggerServant(loggerImplRef);
        _refman.bindToOrb(loggerRef, "iscream.Logger");

        // get a reference to the servant as a Logger
        _logger = _refman.getLogger();          
    
        // create the Configurator
        ConfigurationManagerServant configManRef = new ConfigurationManagerServant(_refman.getRootPOA(), _refman.getLogger());
        
        // and advertise it to the naming context
        _refman.bindToOrb(configManRef, "iscream.ConfigurationManager");

        _logger.write(toString, Logger.SYSINIT, "started");
        
        // we were ok starting...
        return true;
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---
    
    Logger _logger;
    ReferenceManager _refman = ReferenceManager.getInstance();
    
//---STATIC ATTRIBUTES---

}
Revision:	1.17
Committed:	Mon Dec 11 16:40:28 2000 UTC (23 years, 5 months ago) by ajm
Branch:	MAIN
Changes since 1.16:	+44 -117 lines
Log Message:	Removed the main method style of running the core. This class now implements the Component interface, meaning it should be instansiated using the ComponentManager.
#	User	Rev	Content
1	tdb	1.13	//---PACKAGE DECLARATION---
2	ajm	1.16	package uk.ac.ukc.iscream.core;
3	tdb	1.13
4			//---IMPORTS---
5	ajm	1.17	import uk.ac.ukc.iscream.util.ReferenceManager;
6
7			import org.omg.CORBA.ORB;
8	tdb	1.13	import org.omg.CosNaming.*;
9			import org.omg.PortableServer.*;
10	ajm	1.17	import uk.ac.ukc.iscream.core.*;
11	tdb	1.13
12			/**
13			* The main class for the CORE of the I-Scream system.
14			* The main method of this class initialises the ORB
15			* and then starts and registers CORE I-Scream services
16			* with the name service. At which point it essentially
17			* finishs its role and the started services continue to
18			* serve requests from the I-Scream system.
19			*
20	ajm	1.17	* @author $Author: ajm4 $
21			* @version $Id: Core.java,v 1.16 2000/11/29 21:27:08 ajm4 Exp $
22	tdb	1.13	*/
23	ajm	1.17	public class Core implements uk.ac.ukc.iscream.util.Component {
24	tdb	1.13
25			//---FINAL ATTRIBUTES---
26
27			/**
28			* The current CVS revision of this class
29			*/
30	ajm	1.17	public static final String REVISION = "$Revision: 1.16 $";
31	tdb	1.13
32			/**
33			* The toString() of this class
34			* As it won't be instatiated, this is needed.
35			*/
36			public static final String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")";
37
38			/**
39			* The default location of the properties file for the system
40			*/
41			public static final String DEFAULTPROPERTIES = "default.properties";
42
43			//---STATIC METHODS---
44
45	ajm	1.17	//---CONSTRUCTORS---
46
47			//---PUBLIC METHODS---
48
49	tdb	1.13	/**
50			* The main method which starts the CORE
51			* Currently the args are passed direct to the ORB,
52			* so any ORB paramaters could go there.
53			*
54			* @param args the command line arguments
55			*/
56	ajm	1.17	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	tdb	1.13	try {
66	ajm	1.17	loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance();
67	tdb	1.13	} catch (Exception e) {
68	ajm	1.17	System.err.println(toString + ": ERROR Unable to start Logger - " + e.getMessage());
69			// so return false to indicate failure
70			return false;
71	tdb	1.13	}
72	ajm	1.17
73			// setup and bind the LoggerServant
74			LoggerServant loggerRef = new LoggerServant(loggerImplRef);
75			_refman.bindToOrb(loggerRef, "iscream.Logger");
76	tdb	1.13
77	ajm	1.17	// get a reference to the servant as a Logger
78			_logger = _refman.getLogger();
79	tdb	1.13
80	ajm	1.17	// 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			_logger.write(toString, Logger.SYSINIT, "started");
87
88			// we were ok starting...
89			return true;
90	tdb	1.13	}
91
92			//---PRIVATE METHODS---
93
94			//---ACCESSOR/MUTATOR METHODS---
95
96			//---ATTRIBUTES---
97	ajm	1.17
98			Logger _logger;
99			ReferenceManager _refman = ReferenceManager.getInstance();
100	tdb	1.13
101			//---STATIC ATTRIBUTES---
102
103			}