client/monitors/Swap__Monitor.java

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

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

/**
 * This Monitor watches the Swap for all machines
 *
 * @author  $Author: tdb $
 * @version $Id: Swap__Monitor.java,v 1.7 2001/05/29 17:02:34 tdb Exp $
 */
public class Swap__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.7 $";
    
    /**
     * A description of this monitor
     */
    public final String DESC = "Monitors Swap.";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---
    
    /**
     * Analyse a packet of data, and generate an alert if
     * necessary.
     *
     * @param packet the XMLPacket to analyse
     */
    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 = "Swap In Use %";

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

        // percentage of memory in use
        double swapInUse = (1-(swapFree / swapTotal)) * 100;
        int newThreshold = checkAttributeThreshold(swapInUse, reg);

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

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

    /**
     * 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.cms.server.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---
    
    /**
     * Checks a piece of current data, and returns the
     * threshold it breaches, if any.
     *
     * @param attributeString a String representing the current data value
     * @param reg the Register for the host
     * @return the threshold level breached, if any
     */
    private int checkAttributeThreshold(double swapInUse, Register reg) {
        for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
            if (reg.getThreshold(thresholdLevel) != -1.0) {
                if(((double) reg.getThreshold(thresholdLevel)) < swapInUse) {
                    return thresholdLevel;
                }
            }
        }
        return Alert.thresholdNORMAL;
    }

//---ACCESSOR/MUTATOR METHODS---
    
    /**
     * Returns a reference to a specific Queue for this
     * monitor. This Queue returns only the data packets
     * (based on type) that we want too look at.
     *
     * @return a reference to a Queue
     */
    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 = "Swap";
    
    /**
     * A HashMap of Registers (or groups of Registers), one
     * for each host we're monitoring.
     */
    private HashMap _hosts = new HashMap();

//---STATIC ATTRIBUTES---

}
Revision:	1.8
Committed:	Tue Mar 19 14:51:06 2002 UTC (23 years, 7 months ago) by tdb
Branch:	MAIN
Changes since 1.7:	+4 -4 lines
Log Message:	Minor change to log message.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.7	package uk.org.iscream.cms.server.client.monitors;
3	tdb	1.1
4			//---IMPORTS---
5			import java.util.HashMap;
6	tdb	1.2	import java.text.NumberFormat;
7	tdb	1.7	import uk.org.iscream.cms.server.client.*;
8			import uk.org.iscream.cms.server.core.*;
9			import uk.org.iscream.cms.server.util.*;
10			import uk.org.iscream.cms.server.componentmanager.*;
11	tdb	1.1
12			/**
13			* This Monitor watches the Swap for all machines
14			*
15	tdb	1.8	* @author $Author: tdb $
16			* @version $Id: Swap__Monitor.java,v 1.7 2001/05/29 17:02:34 tdb Exp $
17	tdb	1.1	*/
18			public class Swap__Monitor extends MonitorSkeleton {
19
20			//---FINAL ATTRIBUTES---
21
22			/**
23			* The current CVS revision of this class
24			*/
25	tdb	1.8	public final String REVISION = "$Revision: 1.7 $";
26	tdb	1.1
27	tdb	1.6	/**
28			* A description of this monitor
29			*/
30	tdb	1.1	public final String DESC = "Monitors Swap.";
31
32			//---STATIC METHODS---
33
34			//---CONSTRUCTORS---
35
36			//---PUBLIC METHODS---
37	tdb	1.6
38			/**
39			* Analyse a packet of data, and generate an alert if
40			* necessary.
41			*
42			* @param packet the XMLPacket to analyse
43			*/
44	tdb	1.1	public void analysePacket(XMLPacket packet) {
45	ajm	1.5	String source = packet.getParam("packet.attributes.machine_name");
46			if (!_hosts.containsKey(source)) {
47			_hosts.put(source, new Register(source, _name));
48			}
49
50			Register reg = (Register) _hosts.get(source);
51
52			// find out the threshold level we're at
53			String attributeName = "Swap In Use %";
54
55			// get the packet data
56			double swapTotal, swapFree;
57			try {
58			String total = packet.getParam("packet.swap.total");
59			String free = packet.getParam("packet.swap.free");
60			if(total==null \|\| free==null) {
61			throw new NumberFormatException("Memory data invalid");
62	tdb	1.1	}
63	ajm	1.5	swapTotal = Double.parseDouble(total);
64			swapFree = Double.parseDouble(free);
65			} catch (NumberFormatException e) {
66	tdb	1.8	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad swap information: "+e);
67	ajm	1.5	// don't try to continue and process
68			return;
69			}
70
71			// percentage of memory in use
72			double swapInUse = (1-(swapFree / swapTotal)) * 100;
73			int newThreshold = checkAttributeThreshold(swapInUse, reg);
74
75			// format the memoryInUse to a String
76			NumberFormat nf = NumberFormat.getInstance();
77			nf.setMaximumFractionDigits(2);
78			nf.setMinimumFractionDigits(2);
79			String strSwapInUse = nf.format(swapInUse);
80
81			processAlert(newThreshold, attributeName, reg, source, strSwapInUse);
82	tdb	1.1
83			}
84
85			/**
86			* Overrides the {@link java.lang.Object#toString() Object.toString()}
87			* method to provide clean logging (every class should have this).
88			*
89	tdb	1.7	* This uses the uk.org.iscream.cms.server.util.NameFormat class
90	tdb	1.1	* to format the toString()
91			*
92			* @return the name of this class and its CVS revision
93			*/
94			public String toString() {
95			return FormatName.getName(
96			_name,
97			getClass().getName(),
98			REVISION);
99			}
100
101			/**
102			* return the String representation of what the monitor does
103			*/
104			public String getDescription(){
105			return DESC;
106			}
107
108			//---PRIVATE METHODS---
109	tdb	1.6
110			/**
111			* Checks a piece of current data, and returns the
112			* threshold it breaches, if any.
113			*
114			* @param attributeString a String representing the current data value
115			* @param reg the Register for the host
116			* @return the threshold level breached, if any
117			*/
118	tdb	1.1	private int checkAttributeThreshold(double swapInUse, Register reg) {
119			for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
120			if (reg.getThreshold(thresholdLevel) != -1.0) {
121			if(((double) reg.getThreshold(thresholdLevel)) < swapInUse) {
122			return thresholdLevel;
123			}
124			}
125			}
126			return Alert.thresholdNORMAL;
127			}
128
129			//---ACCESSOR/MUTATOR METHODS---
130	tdb	1.6
131			/**
132			* Returns a reference to a specific Queue for this
133			* monitor. This Queue returns only the data packets
134			* (based on type) that we want too look at.
135			*
136			* @return a reference to a Queue
137			*/
138	ajm	1.5	protected Queue getQueue() {
139			return MonitorManager.getInstance().getDataQueue();
140			}
141
142	tdb	1.1
143			//---ATTRIBUTES---
144
145			/**
146			* This is the friendly identifier of the
147			* component this class is running in.
148			* eg, a Filter may be called "filter1",
149			* If this class does not have an owning
150			* component, a name from the configuration
151			* can be placed here. This name could also
152			* be changed to null for utility classes.
153			*/
154			private String _name = "Swap";
155
156			/**
157	tdb	1.6	* A HashMap of Registers (or groups of Registers), one
158			* for each host we're monitoring.
159	tdb	1.1	*/
160			private HashMap _hosts = new HashMap();
161
162			//---STATIC ATTRIBUTES---
163
164			}