client/monitors/Swap__Monitor.java

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

//---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.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 1.10 2002/05/21 16:47:16 tdb Exp $
 */
public class Swap__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.10 $";
    
    /**
     * 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.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:	1.11
Committed:	Wed Feb 5 16:43:46 2003 UTC (21 years, 3 months ago) by tdb
Branch:	MAIN
Changes since 1.10:	+4 -4 lines
Log Message:	Changed the server to use the external util package. Quite a minor change, but does affect a lot of files.
#	User	Rev	Content
1	tdb	1.9	/*
2			* i-scream central monitoring system
3	tdb	1.10	* http://www.i-scream.org.uk
4	tdb	1.9	* Copyright (C) 2000-2002 i-scream
5			*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21	tdb	1.1	//---PACKAGE DECLARATION---
22	tdb	1.7	package uk.org.iscream.cms.server.client.monitors;
23	tdb	1.1
24			//---IMPORTS---
25			import java.util.HashMap;
26	tdb	1.2	import java.text.NumberFormat;
27	tdb	1.7	import uk.org.iscream.cms.server.client.*;
28			import uk.org.iscream.cms.server.core.*;
29	tdb	1.11	import uk.org.iscream.cms.util.*;
30	tdb	1.7	import uk.org.iscream.cms.server.componentmanager.*;
31	tdb	1.1
32			/**
33			* This Monitor watches the Swap for all machines
34			*
35	tdb	1.8	* @author $Author: tdb $
36	tdb	1.11	* @version $Id: Swap__Monitor.java,v 1.10 2002/05/21 16:47:16 tdb Exp $
37	tdb	1.1	*/
38			public class Swap__Monitor extends MonitorSkeleton {
39
40			//---FINAL ATTRIBUTES---
41
42			/**
43			* The current CVS revision of this class
44			*/
45	tdb	1.11	public final String REVISION = "$Revision: 1.10 $";
46	tdb	1.1
47	tdb	1.6	/**
48			* A description of this monitor
49			*/
50	tdb	1.1	public final String DESC = "Monitors Swap.";
51
52			//---STATIC METHODS---
53
54			//---CONSTRUCTORS---
55
56			//---PUBLIC METHODS---
57	tdb	1.6
58			/**
59			* Analyse a packet of data, and generate an alert if
60			* necessary.
61			*
62			* @param packet the XMLPacket to analyse
63			*/
64	tdb	1.1	public void analysePacket(XMLPacket packet) {
65	ajm	1.5	String source = packet.getParam("packet.attributes.machine_name");
66			if (!_hosts.containsKey(source)) {
67			_hosts.put(source, new Register(source, _name));
68			}
69
70			Register reg = (Register) _hosts.get(source);
71
72			// find out the threshold level we're at
73			String attributeName = "Swap In Use %";
74
75			// get the packet data
76			double swapTotal, swapFree;
77			try {
78			String total = packet.getParam("packet.swap.total");
79			String free = packet.getParam("packet.swap.free");
80			if(total==null \|\| free==null) {
81			throw new NumberFormatException("Memory data invalid");
82	tdb	1.1	}
83	ajm	1.5	swapTotal = Double.parseDouble(total);
84			swapFree = Double.parseDouble(free);
85			} catch (NumberFormatException e) {
86	tdb	1.8	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad swap information: "+e);
87	ajm	1.5	// don't try to continue and process
88			return;
89			}
90
91			// percentage of memory in use
92			double swapInUse = (1-(swapFree / swapTotal)) * 100;
93			int newThreshold = checkAttributeThreshold(swapInUse, reg);
94
95			// format the memoryInUse to a String
96			NumberFormat nf = NumberFormat.getInstance();
97			nf.setMaximumFractionDigits(2);
98			nf.setMinimumFractionDigits(2);
99			String strSwapInUse = nf.format(swapInUse);
100
101			processAlert(newThreshold, attributeName, reg, source, strSwapInUse);
102	tdb	1.1
103			}
104
105			/**
106			* Overrides the {@link java.lang.Object#toString() Object.toString()}
107			* method to provide clean logging (every class should have this).
108			*
109	tdb	1.11	* This uses the uk.org.iscream.cms.util.NameFormat class
110	tdb	1.1	* to format the toString()
111			*
112			* @return the name of this class and its CVS revision
113			*/
114			public String toString() {
115			return FormatName.getName(
116			_name,
117			getClass().getName(),
118			REVISION);
119			}
120
121			/**
122			* return the String representation of what the monitor does
123			*/
124			public String getDescription(){
125			return DESC;
126			}
127
128			//---PRIVATE METHODS---
129	tdb	1.6
130			/**
131			* Checks a piece of current data, and returns the
132			* threshold it breaches, if any.
133			*
134			* @param attributeString a String representing the current data value
135			* @param reg the Register for the host
136			* @return the threshold level breached, if any
137			*/
138	tdb	1.1	private int checkAttributeThreshold(double swapInUse, Register reg) {
139			for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
140			if (reg.getThreshold(thresholdLevel) != -1.0) {
141			if(((double) reg.getThreshold(thresholdLevel)) < swapInUse) {
142			return thresholdLevel;
143			}
144			}
145			}
146			return Alert.thresholdNORMAL;
147			}
148
149			//---ACCESSOR/MUTATOR METHODS---
150	tdb	1.6
151			/**
152			* Returns a reference to a specific Queue for this
153			* monitor. This Queue returns only the data packets
154			* (based on type) that we want too look at.
155			*
156			* @return a reference to a Queue
157			*/
158	ajm	1.5	protected Queue getQueue() {
159			return MonitorManager.getInstance().getDataQueue();
160			}
161
162	tdb	1.1
163			//---ATTRIBUTES---
164
165			/**
166			* This is the friendly identifier of the
167			* component this class is running in.
168			* eg, a Filter may be called "filter1",
169			* If this class does not have an owning
170			* component, a name from the configuration
171			* can be placed here. This name could also
172			* be changed to null for utility classes.
173			*/
174			private String _name = "Swap";
175
176			/**
177	tdb	1.6	* A HashMap of Registers (or groups of Registers), one
178			* for each host we're monitoring.
179	tdb	1.1	*/
180			private HashMap _hosts = new HashMap();
181
182			//---STATIC ATTRIBUTES---
183
184			}