server/core/ConfigurationServant.java

//---PACKAGE DECLARATION---

//---IMPORTS---
import uk.ac.ukc.iscream.core.*;
import java.util.*;
import java.io.*;
import java.text.DateFormat;

/**
 * An implementation of the Configuration IDL
 * This class allows i-scream modules to read and even
 * set their configuration from a central location.
 *
 * When classes want their configuration, they contact
 * the Configurator, which will locate their config,
 * open it and pass it to a Configuration object which is
 * then passed back to the calling class.
 *
 * Essentially this class behaves in a similar fashion
 * to the java.util.Properties class.
 *
 * @author  $Author: tdb1 $
 * @version $Id: ConfigurationServant.java,v 1.7 2000/11/13 18:34:12 tdb1 Exp $
 */
class ConfigurationServant extends ConfigurationPOA {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.7 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Creates a new ConfigurationServant taking a hook
     * to a file containing the configuration.
     *
     * @param propertiesStream an InputStream connected to the configuration
     */
    ConfigurationServant(File configurationFile, Logger logRef) {
        _lastModified = configurationFile.lastModified();
        _logRef = logRef;
        
        String date = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(getLastModified()));
        _logRef.write(this.toString(), Logger.SYSMSG, "created: " + configurationFile.getName() + "(" + date + ")" );
        
        try {
            InputStream configurationStream = new FileInputStream(configurationFile);
            _properties.load(configurationStream);
        } catch (Exception e) {
            // ****************************************
            // either IOException from the .load() or 
            // a SecurityException or FileNotFoundException from
            // the inputStream, not sure what to do yet!!!
        }
    }
 
//---PUBLIC METHODS---

    /**
     * A wrapper for java.util.Properties.getProperty
     * When given a key it returns the value of that key
     * ie, key = value
     *
     * @param key the key the value of which is wanted
     */
    public String getProperty(String key) {
        return _properties.getProperty(key); 
    }
    
    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
    }

//---PRIVATE METHODS---

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

    /**
     * Returns the date stamp of the configuration file
     * this object is using.
     *
     * @return the last modified time for the file
     */
    public long getLastModified() {
        return _lastModified;
    }

//---ATTRIBUTES---

    /**
     * The properties object that this class provides a CORBA interface to
     */
    private Properties _properties = new Properties();

    /**
     * Reference to a Logger
     */
    private Logger _logRef;

    /**
     * The date stamp of the configuration file
     * this object is using
     */
    private long _lastModified;
    
//---STATIC ATTRIBUTES---

}
Revision:	1.8
Committed:	Thu Nov 16 18:02:11 2000 UTC (23 years, 6 months ago) by tdb
Branch:	MAIN
Changes since 1.7:	+3 -3 lines
Log Message:	Added support for the new verbosity features in the loggers.
#	User	Rev	Content
1	ajm	1.1	//---PACKAGE DECLARATION---
2
3			//---IMPORTS---
4	tdb	1.4	import uk.ac.ukc.iscream.core.*;
5	ajm	1.1	import java.util.*;
6			import java.io.*;
7	tdb	1.7	import java.text.DateFormat;
8	ajm	1.1
9			/**
10			* An implementation of the Configuration IDL
11			* This class allows i-scream modules to read and even
12			* set their configuration from a central location.
13			*
14			* When classes want their configuration, they contact
15			* the Configurator, which will locate their config,
16			* open it and pass it to a Configuration object which is
17			* then passed back to the calling class.
18			*
19			* Essentially this class behaves in a similar fashion
20			* to the java.util.Properties class.
21			*
22	tdb	1.3	* @author $Author: tdb1 $
23	tdb	1.8	* @version $Id: ConfigurationServant.java,v 1.7 2000/11/13 18:34:12 tdb1 Exp $
24	ajm	1.1	*/
25			class ConfigurationServant extends ConfigurationPOA {
26
27			//---FINAL ATTRIBUTES---
28
29			/**
30			* The current CVS revision of this class
31			*/
32	tdb	1.8	public final String REVISION = "$Revision: 1.7 $";
33	ajm	1.1
34			//---STATIC METHODS---
35
36			//---CONSTRUCTORS---
37
38			/**
39			* Creates a new ConfigurationServant taking a hook
40			* to a file containing the configuration.
41			*
42			* @param propertiesStream an InputStream connected to the configuration
43			*/
44	tdb	1.2	ConfigurationServant(File configurationFile, Logger logRef) {
45	tdb	1.3	_lastModified = configurationFile.lastModified();
46	tdb	1.7	_logRef = logRef;
47	tdb	1.3
48	tdb	1.7	String date = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(getLastModified()));
49	tdb	1.8	_logRef.write(this.toString(), Logger.SYSMSG, "created: " + configurationFile.getName() + "(" + date + ")" );
50	tdb	1.3
51	ajm	1.1	try {
52			InputStream configurationStream = new FileInputStream(configurationFile);
53	tdb	1.2	_properties.load(configurationStream);
54	ajm	1.1	} catch (Exception e) {
55			// ****************************************
56			// either IOException from the .load() or
57			// a SecurityException or FileNotFoundException from
58			// the inputStream, not sure what to do yet!!!
59			}
60			}
61
62			//---PUBLIC METHODS---
63
64			/**
65			* A wrapper for java.util.Properties.getProperty
66			* When given a key it returns the value of that key
67			* ie, key = value
68			*
69			* @param key the key the value of which is wanted
70			*/
71			public String getProperty(String key) {
72	tdb	1.2	return _properties.getProperty(key);
73	ajm	1.1	}
74
75			/**
76	tdb	1.5	* Overrides the {@link java.lang.Object#toString() Object.toString()}
77	ajm	1.1	* method to provide clean logging (every class should have this).
78			*
79			* @return the name of this class and its CVS revision
80			*/
81			public String toString() {
82	tdb	1.6	return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
83	ajm	1.1	}
84
85			//---PRIVATE METHODS---
86
87			//---ACCESSOR/MUTATOR METHODS---
88
89	tdb	1.3	/**
90			* Returns the date stamp of the configuration file
91			* this object is using.
92			*
93			* @return the last modified time for the file
94			*/
95			public long getLastModified() {
96			return _lastModified;
97			}
98
99	ajm	1.1	//---ATTRIBUTES---
100
101			/**
102			* The properties object that this class provides a CORBA interface to
103			*/
104	tdb	1.2	private Properties _properties = new Properties();
105
106			/**
107			* Reference to a Logger
108			*/
109			private Logger _logRef;
110	ajm	1.1
111	tdb	1.3	/**
112			* The date stamp of the configuration file
113			* this object is using
114			*/
115			private long _lastModified;
116
117	ajm	1.1	//---STATIC ATTRIBUTES---
118
119	tdb	1.2	}