client/monitors/Memory__Monitor.java

//---PACKAGE DECLARATION---
package uk.org.iscream.client.monitors;

//---IMPORTS---
import java.util.HashMap;
import java.text.NumberFormat;
import uk.org.iscream.client.*;
import uk.org.iscream.core.*;
import uk.org.iscream.util.*;
import uk.org.iscream.componentmanager.*;

/**
 * This Monitor watches the Memory for all machines
 *
 * @author  $Author: ajm4 $
 * @version $Id: Memory__Monitor.java,v 1.5 2001/03/18 00:54:04 ajm4 Exp $
 */
public class Memory__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.5 $";
    
    public final String DESC = "Monitors Memory.";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    public void analysePacket(XMLPacket packet) {
        String source = packet.getParam("packet.attributes.machine_name");
        if (!_hosts.containsKey(source)) {
            _hosts.put(source, new Register(source, _name));
        }

        Register reg = (Register) _hosts.get(source);

        // find out the threshold level we're at
        String attributeName = "Memory In Use %";

        // get the packet data
        double memoryTotal, memoryFree;
        try {
            String total = packet.getParam("packet.memory.total");
            String free = packet.getParam("packet.memory.free");
            if(total==null || free==null) {
                throw new NumberFormatException("Memory data invalid");
            }
            memoryTotal = Double.parseDouble(total);
            memoryFree = Double.parseDouble(free);
        } catch (NumberFormatException e) {
            _logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad memory information: "+e);
            // don't try to continue and process
            return;
        }

        boolean useValue = false;
        try {
           String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure");
           if (option.equals("VALUE")) {
               useValue = true;
           }                            
        } catch (PropertyNotFoundException e) {
            // we default to percentage
        }

        // this  bit determines if the memory check is a % check
        // or a kb check
        double memoryInUse;
        if(useValue) {
            // kb memory in use
            memoryInUse = memoryTotal - memoryFree;
        } else {
            // % memory in use
            memoryInUse = (1-(memoryFree / memoryTotal)) * 100;
        }

        int newThreshold = checkAttributeThreshold(memoryInUse, reg);

        // format the memoryInUse to a String
        NumberFormat nf = NumberFormat.getInstance();
        nf.setMaximumFractionDigits(2);
        nf.setMinimumFractionDigits(2);
        String strMemoryInUse = nf.format(memoryInUse);

        processAlert(newThreshold, attributeName, reg, source, strMemoryInUse);
    }

    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.org.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,
            getClass().getName(),
            REVISION);
    }

    /**
     * return the String representation of what the monitor does
     */
    public String getDescription(){
        return DESC;
    }

//---PRIVATE METHODS---

    private int checkAttributeThreshold(double memoryInUse, Register reg) {
        for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
            if (reg.getThreshold(thresholdLevel) != -1.0) {
                if(((double) reg.getThreshold(thresholdLevel)) < memoryInUse) {
                    return thresholdLevel;
                }
            }
        }
        return Alert.thresholdNORMAL;
    }

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

    protected Queue getQueue() {
        return MonitorManager.getInstance().getDataQueue();
    }

//---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 = "Memory";
    
    /**
     * A reference to the configuration proxy in use
     */
    private ConfigurationProxy _cp = ConfigurationProxy.getInstance();

    private HashMap _hosts = new HashMap();

//---STATIC ATTRIBUTES---

}
Revision:	1.6
Committed:	Thu Mar 22 17:57:06 2001 UTC (23 years, 2 months ago) by ajm
Branch:	MAIN
Changes since 1.5:	+61 -59 lines
Log Message:	Modified to use the new style queuing in the local client
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.4	package uk.org.iscream.client.monitors;
3	tdb	1.1
4			//---IMPORTS---
5			import java.util.HashMap;
6	tdb	1.2	import java.text.NumberFormat;
7	tdb	1.4	import uk.org.iscream.client.*;
8			import uk.org.iscream.core.*;
9			import uk.org.iscream.util.*;
10			import uk.org.iscream.componentmanager.*;
11	tdb	1.1
12			/**
13			* This Monitor watches the Memory for all machines
14			*
15	ajm	1.6	* @author $Author: ajm4 $
16			* @version $Id: Memory__Monitor.java,v 1.5 2001/03/18 00:54:04 ajm4 Exp $
17	tdb	1.1	*/
18			public class Memory__Monitor extends MonitorSkeleton {
19
20			//---FINAL ATTRIBUTES---
21
22			/**
23			* The current CVS revision of this class
24			*/
25	ajm	1.6	public final String REVISION = "$Revision: 1.5 $";
26	tdb	1.1
27			public final String DESC = "Monitors Memory.";
28
29			//---STATIC METHODS---
30
31			//---CONSTRUCTORS---
32
33			//---PUBLIC METHODS---
34
35			public void analysePacket(XMLPacket packet) {
36	ajm	1.6	String source = packet.getParam("packet.attributes.machine_name");
37			if (!_hosts.containsKey(source)) {
38			_hosts.put(source, new Register(source, _name));
39			}
40
41			Register reg = (Register) _hosts.get(source);
42
43			// find out the threshold level we're at
44			String attributeName = "Memory In Use %";
45
46			// get the packet data
47			double memoryTotal, memoryFree;
48			try {
49			String total = packet.getParam("packet.memory.total");
50			String free = packet.getParam("packet.memory.free");
51			if(total==null \|\| free==null) {
52			throw new NumberFormatException("Memory data invalid");
53	tdb	1.1	}
54	ajm	1.6	memoryTotal = Double.parseDouble(total);
55			memoryFree = Double.parseDouble(free);
56			} catch (NumberFormatException e) {
57			_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad memory information: "+e);
58			// don't try to continue and process
59			return;
60			}
61
62			boolean useValue = false;
63			try {
64			String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure");
65			if (option.equals("VALUE")) {
66			useValue = true;
67			}
68			} catch (PropertyNotFoundException e) {
69			// we default to percentage
70			}
71
72			// this bit determines if the memory check is a % check
73			// or a kb check
74			double memoryInUse;
75			if(useValue) {
76			// kb memory in use
77			memoryInUse = memoryTotal - memoryFree;
78			} else {
79			// % memory in use
80			memoryInUse = (1-(memoryFree / memoryTotal)) * 100;
81	tdb	1.1	}
82	ajm	1.6
83			int newThreshold = checkAttributeThreshold(memoryInUse, reg);
84
85			// format the memoryInUse to a String
86			NumberFormat nf = NumberFormat.getInstance();
87			nf.setMaximumFractionDigits(2);
88			nf.setMinimumFractionDigits(2);
89			String strMemoryInUse = nf.format(memoryInUse);
90
91			processAlert(newThreshold, attributeName, reg, source, strMemoryInUse);
92	tdb	1.1	}
93
94			/**
95			* Overrides the {@link java.lang.Object#toString() Object.toString()}
96			* method to provide clean logging (every class should have this).
97			*
98	tdb	1.4	* This uses the uk.org.iscream.util.NameFormat class
99	tdb	1.1	* to format the toString()
100			*
101			* @return the name of this class and its CVS revision
102			*/
103			public String toString() {
104			return FormatName.getName(
105			_name,
106			getClass().getName(),
107			REVISION);
108			}
109
110			/**
111			* return the String representation of what the monitor does
112			*/
113			public String getDescription(){
114			return DESC;
115			}
116
117			//---PRIVATE METHODS---
118
119			private int checkAttributeThreshold(double memoryInUse, Register reg) {
120			for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
121			if (reg.getThreshold(thresholdLevel) != -1.0) {
122			if(((double) reg.getThreshold(thresholdLevel)) < memoryInUse) {
123			return thresholdLevel;
124			}
125			}
126			}
127			return Alert.thresholdNORMAL;
128			}
129
130			//---ACCESSOR/MUTATOR METHODS---
131	ajm	1.6
132			protected Queue getQueue() {
133			return MonitorManager.getInstance().getDataQueue();
134			}
135	tdb	1.1
136			//---ATTRIBUTES---
137
138			/**
139			* This is the friendly identifier of the
140			* component this class is running in.
141			* eg, a Filter may be called "filter1",
142			* If this class does not have an owning
143			* component, a name from the configuration
144			* can be placed here. This name could also
145			* be changed to null for utility classes.
146			*/
147			private String _name = "Memory";
148
149			/**
150			* A reference to the configuration proxy in use
151			*/
152			private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
153
154			private HashMap _hosts = new HashMap();
155
156			//---STATIC ATTRIBUTES---
157
158			}