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.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 1.9 2002/05/18 18:16:00 tdb Exp $
 */
public class Swap__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.9 $";
    
    /**
     * 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:	1.10
Committed:	Tue May 21 16:47:16 2002 UTC (22 years ago) by tdb
Branch:	MAIN
Changes since 1.9:	+3 -2 lines
Log Message:	Added URL to GPL headers.
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org.uk
4	* 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	//---PACKAGE DECLARATION---
22	package uk.org.iscream.cms.server.client.monitors;
23
24	//---IMPORTS---
25	import java.util.HashMap;
26	import java.text.NumberFormat;
27	import uk.org.iscream.cms.server.client.*;
28	import uk.org.iscream.cms.server.core.*;
29	import uk.org.iscream.cms.server.util.*;
30	import uk.org.iscream.cms.server.componentmanager.*;
31
32	/**
33	* This Monitor watches the Swap for all machines
34	*
35	* @author $Author: tdb $
36	* @version $Id: Swap__Monitor.java,v 1.9 2002/05/18 18:16:00 tdb Exp $
37	*/
38	public class Swap__Monitor extends MonitorSkeleton {
39
40	//---FINAL ATTRIBUTES---
41
42	/**
43	* The current CVS revision of this class
44	*/
45	public final String REVISION = "$Revision: 1.9 $";
46
47	/**
48	* A description of this monitor
49	*/
50	public final String DESC = "Monitors Swap.";
51
52	//---STATIC METHODS---
53
54	//---CONSTRUCTORS---
55
56	//---PUBLIC METHODS---
57
58	/**
59	* Analyse a packet of data, and generate an alert if
60	* necessary.
61	*
62	* @param packet the XMLPacket to analyse
63	*/
64	public void analysePacket(XMLPacket packet) {
65	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	}
83	swapTotal = Double.parseDouble(total);
84	swapFree = Double.parseDouble(free);
85	} catch (NumberFormatException e) {
86	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad swap information: "+e);
87	// 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
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	* This uses the uk.org.iscream.cms.server.util.NameFormat class
110	* 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
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	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
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	protected Queue getQueue() {
159	return MonitorManager.getInstance().getDataQueue();
160	}
161
162
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	* A HashMap of Registers (or groups of Registers), one
178	* for each host we're monitoring.
179	*/
180	private HashMap _hosts = new HashMap();
181
182	//---STATIC ATTRIBUTES---
183
184	}