server/filtermanager/FilterManager.java

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

//---IMPORTS---
import uk.ac.ukc.iscream.util.*;
import uk.ac.ukc.iscream.core.*;

/**
 * The FilterManager handles initialisation
 * of hosts with the system, allowing hosts to
 * gain their configuration and a hook to a Filter 
 * to talk to.
 *
 * @author  $Author: tdb1 $
 * @version $Id: FilterManager.java,v 1.11 2000/12/07 12:30:15 tdb1 Exp $
 */
public class FilterManager implements uk.ac.ukc.iscream.util.Component {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.11 $";
    
    /**
     * The friendly name for the FilterManager, used by
     * all related classes.
     */
    public static final String NAME = "FilterManager";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    /**
     * This method starts the FilterManager
     */
     public void start() throws ComponentStartException {
                
        _logger.write(toString(), Logger.SYSINIT, "coming up");
        
        // configuration variable we require
        int listenPort = 0;

        Configuration config = _refman.getCM().getConfiguration("FilterManager");
        if (config == null) {
            System.err.println("CRITICAL:Unable to obtain configuration" +
                               "\n         Advise you check the i-scream log for more information.");
            _logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
            System.exit(1);
        } else {
            try {
                listenPort = Integer.parseInt(config.getProperty("FilterManager.listenPort"));
            } catch (org.omg.CORBA.MARSHAL e) {
                System.err.println ("CRITICAL:Unable to obtain required configuration property" +
                                    "\n         Advise you check the i-scream log for more information.");
                _logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
                System.exit(1);
            }
        }
        
        _logger.write(toString(), Logger.SYSMSG, "configured");
        
        HostListener hostListener = new HostListener(listenPort);
        hostListener.start();
        
        _logger.write(toString(), Logger.SYSINIT, "started");
    }

    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.ac.ukc.iscream.util.NameFormat class
     * to format the toString()
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return FormatName.getName(
            _name,
            this.getClass().getName(),
            REVISION);
    }

//---PRIVATE METHODS---

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

//---ATTRIBUTES---

    /**
     * This is the friendly identifier of the
     * component this class is running in.
     * eg, a Filter may be called "filter1",
     * If this class does not have an owning
     * component,  a name from the configuration
     * can be placed here.  This name could also
     * be changed to null for utility classes.
     */
    private String _name = FilterManager.NAME;

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger = ReferenceManager.getInstance().getLogger();

    /**
     * A reference to the reference manager in use
     */
    private ReferenceManager _refman = ReferenceManager.getInstance();

//---STATIC ATTRIBUTES---

}            
Revision:	1.12
Committed:	Tue Dec 12 19:17:02 2000 UTC (23 years, 5 months ago) by ajm
Branch:	MAIN
Changes since 1.11:	+72 -33 lines
Log Message:	is now a component class also tidied the code a bit
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.9	package uk.ac.ukc.iscream.filtermanager;
3	tdb	1.1
4			//---IMPORTS---
5	ajm	1.12	import uk.ac.ukc.iscream.util.*;
6	tdb	1.1	import uk.ac.ukc.iscream.core.*;
7
8			/**
9	ajm	1.12	* The FilterManager handles initialisation
10			* of hosts with the system, allowing hosts to
11			* gain their configuration and a hook to a Filter
12			* to talk to.
13	tdb	1.1	*
14	tdb	1.8	* @author $Author: tdb1 $
15	ajm	1.12	* @version $Id: FilterManager.java,v 1.11 2000/12/07 12:30:15 tdb1 Exp $
16	tdb	1.1	*/
17	ajm	1.12	public class FilterManager implements uk.ac.ukc.iscream.util.Component {
18	tdb	1.1
19			//---FINAL ATTRIBUTES---
20
21			/**
22			* The current CVS revision of this class
23			*/
24	ajm	1.12	public static final String REVISION = "$Revision: 1.11 $";
25
26			/**
27			* The friendly name for the FilterManager, used by
28			* all related classes.
29			*/
30			public static final String NAME = "FilterManager";
31	tdb	1.1
32			//---STATIC METHODS---
33
34	ajm	1.12	//---CONSTRUCTORS---
35
36			//---PUBLIC METHODS---
37
38			/**
39			* This method starts the FilterManager
40			*/
41			public void start() throws ComponentStartException {
42
43			_logger.write(toString(), Logger.SYSINIT, "coming up");
44	tdb	1.10
45			// configuration variable we require
46			int listenPort = 0;
47
48	ajm	1.12	Configuration config = _refman.getCM().getConfiguration("FilterManager");
49	tdb	1.10	if (config == null) {
50	ajm	1.12	System.err.println("CRITICAL:Unable to obtain configuration" +
51			"\n Advise you check the i-scream log for more information.");
52			_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
53			System.exit(1);
54	tdb	1.10	} else {
55			try {
56			listenPort = Integer.parseInt(config.getProperty("FilterManager.listenPort"));
57			} catch (org.omg.CORBA.MARSHAL e) {
58	ajm	1.12	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
59			"\n Advise you check the i-scream log for more information.");
60			_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
61			System.exit(1);
62	tdb	1.1	}
63			}
64	tdb	1.10
65	ajm	1.12	_logger.write(toString(), Logger.SYSMSG, "configured");
66	tdb	1.10
67			HostListener hostListener = new HostListener(listenPort);
68			hostListener.start();
69
70	ajm	1.12	_logger.write(toString(), Logger.SYSINIT, "started");
71	tdb	1.1	}
72
73	ajm	1.12	/**
74			* Overrides the {@link java.lang.Object#toString() Object.toString()}
75			* method to provide clean logging (every class should have this).
76			*
77			* This uses the uk.ac.ukc.iscream.util.NameFormat class
78			* to format the toString()
79			*
80			* @return the name of this class and its CVS revision
81			*/
82			public String toString() {
83			return FormatName.getName(
84			_name,
85			this.getClass().getName(),
86			REVISION);
87			}
88	tdb	1.1
89			//---PRIVATE METHODS---
90
91			//---ACCESSOR/MUTATOR METHODS---
92
93			//---ATTRIBUTES---
94	ajm	1.12
95			/**
96			* This is the friendly identifier of the
97			* component this class is running in.
98			* eg, a Filter may be called "filter1",
99			* If this class does not have an owning
100			* component, a name from the configuration
101			* can be placed here. This name could also
102			* be changed to null for utility classes.
103			*/
104			private String _name = FilterManager.NAME;
105
106			/**
107			* This holds a reference to the
108			* system logger that is being used.
109			*/
110			private Logger _logger = ReferenceManager.getInstance().getLogger();
111
112			/**
113			* A reference to the reference manager in use
114			*/
115			private ReferenceManager _refman = ReferenceManager.getInstance();
116	tdb	1.1
117			//---STATIC ATTRIBUTES---
118
119			}