host/java/SystemMonitor.java

//---PACKAGE DECLARATION---

//---IMPORTS---

import java.io.*;
import java.net.*;
import java.util.*;

/**
 * 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 1.5 2000/12/07 18:25:37 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 = 1;


        // why oh why wont ultra edit let me put Long in the next line? oh its trying to 
        // correct keywords =|
        try {
                udpcheckInterval = Long.parseLong(config.getProperty("UDPUpdateTime")) * 1000;
        }
        catch ( NumberFormatException e ){
                System.out.println("The value for UDPUpdateTime is invalid, using a default");
                // 5 mins
                udpcheckInterval = 5000 * 60;
        }
        // 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
        String host = new String();
        String ip = new String();
        try {
            host = InetAddress.getLocalHost().getHostName();
                    ip = InetAddress.getLocalHost().getHostAddress();
        } catch(UnknownHostException e) {
            System.out.println(e);
        }
                String date = Long.toString(System.currentTimeMillis());
        XMLFormatter xml = new XMLFormatter("packet", "machine_name=\""+host+"\" ip=\""+ip+"\" date=\""+date+"\" seq_no=\""+sequence+"\"");

            // get and decode the data
            DecodeCPU_TXT details = new DecodeCPU_TXT();

        // add the decoded info
        xml.addString(details.getItems());
        
        
        // MUST FIX THIS..!!!!
        try {
                long updateIn = ( lastCheck + udpcheckInterval )-System.currentTimeMillis();
                if ( updateIn > 0 ){
                        Thread.sleep(updateIn);
                }
                else
                { 
                        Thread.sleep(defaultUpdateTime);
                }
        }
        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 udpcheckInterval;
    private final long defaultUpdateTime = 60000;

//---STATIC ATTRIBUTES---

} // class
Revision:	1.6
Committed:	Thu Dec 7 23:21:13 2000 UTC (23 years, 9 months ago) by tdb
Branch:	MAIN
Changes since 1.5:	+17 -33 lines
Log Message:	Changed to go with the new Decoding class stuff.
#	User	Rev	Content
1	ab11	1.2	//---PACKAGE DECLARATION---
2
3			//---IMPORTS---
4
5	ab11	1.5	import java.io.*;
6	tdb	1.6	import java.net.*;
7			import java.util.*;
8	ab11	1.3
9	ab11	1.2	/**
10			* Gathers system information then outputs it as XML
11			* Collects data based on properties gained from the configurator
12			* then packages these up using XMLFormatter and outputs them if
13			* the timeout has passed.
14			*
15			* @author $Author: ab11 $
16	tdb	1.6	* @version $Id: SystemMonitor.java,v 1.5 2000/12/07 18:25:37 ab11 Exp $
17	ab11	1.2	*/
18	ab11	1.1	class SystemMonitor {
19
20	ab11	1.2	//---FINAL ATTRIBUTES---
21
22			//---STATIC METHODS---
23
24			//---CONSTRUCTORS---
25
26			/**
27			* Public constructor for the class. Takes in a Config object to gain its
28			* properties from.
29			*
30			*/
31			public SystemMonitor( Config config ){
32			// create a new instace, get the info we need out of config
33			// like things to monitor
34
35			lastCheck = System.currentTimeMillis();
36	tdb	1.6	sequence = 1;
37	ab11	1.2
38
39			// why oh why wont ultra edit let me put Long in the next line? oh its trying to
40			// correct keywords =\|
41	ab11	1.4	try {
42			udpcheckInterval = Long.parseLong(config.getProperty("UDPUpdateTime")) * 1000;
43			}
44			catch ( NumberFormatException e ){
45			System.out.println("The value for UDPUpdateTime is invalid, using a default");
46			// 5 mins
47			udpcheckInterval = 5000 * 60;
48			}
49	ab11	1.3	// make the check interval into seconds
50	ab11	1.2
51			}
52
53			//---PUBLIC METHODS---
54
55			/**
56			* Gathers system information and will black until the timeout has passed.
57			*
58			* @return the system information in an XML packet
59			*/
60			public String getInfo(){
61			// called to retrieve the stored averages and output them as a XML string
62	tdb	1.6	String host = new String();
63			String ip = new String();
64	ab11	1.5	try {
65	tdb	1.6	host = InetAddress.getLocalHost().getHostName();
66			ip = InetAddress.getLocalHost().getHostAddress();
67			} catch(UnknownHostException e) {
68			System.out.println(e);
69	ab11	1.5	}
70	tdb	1.6	String date = Long.toString(System.currentTimeMillis());
71			XMLFormatter xml = new XMLFormatter("packet", "machine_name=\""+host+"\" ip=\""+ip+"\" date=\""+date+"\" seq_no=\""+sequence+"\"");
72
73			// get and decode the data
74			DecodeCPU_TXT details = new DecodeCPU_TXT();
75
76			// add the decoded info
77	ab11	1.5	xml.addString(details.getItems());
78
79
80	ab11	1.2	// MUST FIX THIS..!!!!
81	ab11	1.3	try {
82	ab11	1.4	long updateIn = ( lastCheck + udpcheckInterval )-System.currentTimeMillis();
83			if ( updateIn > 0 ){
84			Thread.sleep(updateIn);
85			}
86			else
87			{
88			Thread.sleep(defaultUpdateTime);
89			}
90	ab11	1.3	}
91			catch( InterruptedException e ){
92			System.out.println("Sleep interrupted");
93	ab11	1.2	}
94
95			// increment sequence.
96			sequence++;
97	ab11	1.3	lastCheck = System.currentTimeMillis();
98	ab11	1.2
99			// finally return a string
100			return xml.returnXML();
101			} // getinfo()
102
103			//---PRIVATE METHODS---
104
105			//---ACCESSOR/MUTATOR METHODS---
106
107			//---ATTRIBUTES---
108	ab11	1.1
109			private long lastCheck;
110			private int sequence;
111	ab11	1.4	private long udpcheckInterval;
112			private final long defaultUpdateTime = 60000;
113	ab11	1.2
114			//---STATIC ATTRIBUTES---
115	ab11	1.1
116			} // class