host/java/SystemMonitor.java

//---PACKAGE DECLARATION---

//---IMPORTS---

import java.util.Random;

/**
 * Gathers system information then outputs it as XML
 * Collects data based on properties gained from the configurator
 * then packages these up using XMLFormatter and outputs them if
 * the timeout has passed.
 *
 * @author  $Author: ab11 $
 * @version $Id: SystemMonitor.java,v 1.2 2000/11/27 20:36:30 ab11 Exp $
 */
class SystemMonitor {

//---FINAL ATTRIBUTES---

//---STATIC METHODS---

//---CONSTRUCTORS---

/**
 * Public constructor for the class. Takes in a Config object to gain its
 * properties from.
 *
 */   
 public SystemMonitor( Config config ){
        // create a new instace, get the info we need out of config
        // like things to monitor
        
        lastCheck = System.currentTimeMillis();
        sequence = 0;


        // why oh why wont ultra edit let me put Long in the next line? oh its trying to 
        // correct keywords =|
        checkInterval = Long.parseLong(config.getProperty("UDPUpdateTime")) * 1000;
        // make the check interval into seconds
        
    }

//---PUBLIC METHODS---

   /**
    * Gathers system information and will black until the timeout has passed.
    *
    * @return the system information in an XML packet
    */
    public String getInfo(){
        // called to retrieve the stored averages and output them as a XML string
        XMLFormatter xml = new XMLFormatter("packet");
        
        Random rand = new Random();
        
        // just send some dummy info for now.
        xml.addNest("packet_info");
            String currentTime = Long.toString(System.currentTimeMillis());
            xml.addElement("date_time", currentTime );
            xml.addElement("sequence", Integer.toString(sequence));
        xml.closeNest();
        xml.addNest("core");
            xml.addElement("cpu",""+rand.nextInt(100));
            xml.addElement("memory",""+rand.nextInt(100));
        xml.closeNest();
        if ( rand.nextBoolean() ){ 
                xml.addNest("additional");
                    xml.addElement("users",""+rand.nextInt(30));
                xml.closeNest();
        }
        // MUST FIX THIS..!!!!
        try {
                Thread.sleep(( lastCheck + checkInterval )-System.currentTimeMillis());
        }
        catch( InterruptedException e ){
                System.out.println("Sleep interrupted");
        }
        
        // increment sequence.
        sequence++;
        lastCheck = System.currentTimeMillis();
                
        // finally return a string 
        return xml.returnXML();
    } // getinfo()
    
//---PRIVATE METHODS---

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

//---ATTRIBUTES---

    private long lastCheck;
    private int sequence;
    private long checkInterval;

//---STATIC ATTRIBUTES---

} // class
Revision:	1.3
Committed:	Thu Nov 30 04:11:00 2000 UTC (24 years, 11 months ago) by ab11
Branch:	MAIN
Changes since 1.2:	+20 -10 lines
Log Message:	Fixed waiting with Thread.sleep() added some randomiminty to the XML packets
#	User	Rev	Content
1	ab11	1.2	//---PACKAGE DECLARATION---
2
3			//---IMPORTS---
4
5	ab11	1.3	import java.util.Random;
6
7	ab11	1.2	/**
8			* Gathers system information then outputs it as XML
9			* Collects data based on properties gained from the configurator
10			* then packages these up using XMLFormatter and outputs them if
11			* the timeout has passed.
12			*
13			* @author $Author: ab11 $
14	ab11	1.3	* @version $Id: SystemMonitor.java,v 1.2 2000/11/27 20:36:30 ab11 Exp $
15	ab11	1.2	*/
16	ab11	1.1	class SystemMonitor {
17
18	ab11	1.2	//---FINAL ATTRIBUTES---
19
20			//---STATIC METHODS---
21
22			//---CONSTRUCTORS---
23
24			/**
25			* Public constructor for the class. Takes in a Config object to gain its
26			* properties from.
27			*
28			*/
29			public SystemMonitor( Config config ){
30			// create a new instace, get the info we need out of config
31			// like things to monitor
32
33			lastCheck = System.currentTimeMillis();
34			sequence = 0;
35
36
37			// why oh why wont ultra edit let me put Long in the next line? oh its trying to
38			// correct keywords =\|
39	ab11	1.3	checkInterval = Long.parseLong(config.getProperty("UDPUpdateTime")) * 1000;
40			// make the check interval into seconds
41	ab11	1.2
42			}
43
44			//---PUBLIC METHODS---
45
46			/**
47			* Gathers system information and will black until the timeout has passed.
48			*
49			* @return the system information in an XML packet
50			*/
51			public String getInfo(){
52			// called to retrieve the stored averages and output them as a XML string
53			XMLFormatter xml = new XMLFormatter("packet");
54
55	ab11	1.3	Random rand = new Random();
56
57	ab11	1.2	// just send some dummy info for now.
58			xml.addNest("packet_info");
59			String currentTime = Long.toString(System.currentTimeMillis());
60			xml.addElement("date_time", currentTime );
61			xml.addElement("sequence", Integer.toString(sequence));
62			xml.closeNest();
63			xml.addNest("core");
64	ab11	1.3	xml.addElement("cpu",""+rand.nextInt(100));
65			xml.addElement("memory",""+rand.nextInt(100));
66	ab11	1.2	xml.closeNest();
67	ab11	1.3	if ( rand.nextBoolean() ){
68			xml.addNest("additional");
69			xml.addElement("users",""+rand.nextInt(30));
70			xml.closeNest();
71			}
72	ab11	1.2	// MUST FIX THIS..!!!!
73	ab11	1.3	try {
74			Thread.sleep(( lastCheck + checkInterval )-System.currentTimeMillis());
75			}
76			catch( InterruptedException e ){
77			System.out.println("Sleep interrupted");
78	ab11	1.2	}
79
80			// increment sequence.
81			sequence++;
82	ab11	1.3	lastCheck = System.currentTimeMillis();
83	ab11	1.2
84			// finally return a string
85			return xml.returnXML();
86			} // getinfo()
87
88			//---PRIVATE METHODS---
89
90			//---ACCESSOR/MUTATOR METHODS---
91
92			//---ATTRIBUTES---
93	ab11	1.1
94			private long lastCheck;
95			private int sequence;
96			private long checkInterval;
97	ab11	1.2
98			//---STATIC ATTRIBUTES---
99	ab11	1.1
100			} // class