client/monitors/DiskIO__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.util.HashSet;
import java.util.Set;
import java.util.Iterator;
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 Disks for all machines
 *
 * @author  $Author: tdb $
 * @version $Id: DiskIO__Monitor.java,v 1.2 2004/01/15 13:41:47 tdb Exp $
 */
public class DiskIO__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.2 $";
    
    /**
     * A description of this monitor
     */
    public final String DESC = "Monitors disk IO on all hosts.";
    
//---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(!checkBooleanConfig("Host." + source, "Monitor." + _name + ".enable")) {
            return;
        } 
        if (!_hostsR.containsKey(source)) {
            _hostsR.put(source, new HashMap());
        }
        if (!_hostsW.containsKey(source)) {
            _hostsW.put(source, new HashMap());
        }

        HashMap diskRegistersR = (HashMap) _hostsR.get(source);
        HashMap diskRegistersW = (HashMap) _hostsW.get(source);
        
        // key prefix
        String keyPrefix = "packet.diskio.p";
        
        // a temporary holder for all the disk attributes we find
        HashSet disks = new HashSet();

        // unfortunatly we need to check the whole packet
        // to find the disks, and then get the data attributes
        Set packetSet = packet.getSet();
        Iterator i = packetSet.iterator();
        while (i.hasNext()) {
            String dataKey = (String) i.next();
            if(dataKey.startsWith(keyPrefix)) {
                // pos is after "packet.diskio.p"
                int pos = keyPrefix.length();
                String diskNumber = dataKey.substring(pos, dataKey.indexOf('.', pos));
                String thisDisk = keyPrefix.concat(diskNumber);
                
                if(!disks.contains(thisDisk)) {
                    // add the disk to our list
                    disks.add(thisDisk);

                    String name = packet.getParam(thisDisk + ".attributes.name");
                    
                    String rbytes = packet.getParam(thisDisk + ".attributes.rbytes");
                    String wbytes = packet.getParam(thisDisk + ".attributes.wbytes");

                    // *** now process this disk ***

                    // check if we've seen this disk before on a previous run
                    // if not, we need to create a register for it
                    if(!diskRegistersR.containsKey(name)) {
                        diskRegistersR.put(name, new Register(source, _name + ".rbytes", name));
                    }
                    if(!diskRegistersW.containsKey(name)) {
                        diskRegistersW.put(name, new Register(source, _name + ".wbytes", name));
                    }

                    // get the register for this disk
                    Register regR = (Register) diskRegistersR.get(name);
                    Register regW = (Register) diskRegistersW.get(name);

                    // get the packet data
                    int diskRbytes, diskWbytes;
                    try {
                        if(rbytes==null || wbytes==null) {
                            throw new NumberFormatException("Disk data invalid");
                        }
                        diskRbytes = Integer.parseInt(rbytes);
                        diskWbytes = Integer.parseInt(wbytes);
                    } catch (NumberFormatException e) {
                        _logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad diskio information: "+e);
                        // don't try to continue and process, try next disk
                        break;
                    }
                    
                    int newThresholdR = checkAttributeThreshold(diskRbytes, regR);
                    int newThresholdW = checkAttributeThreshold(diskWbytes, regW);

                    // say which disk had the problem
                    String attributeNameR = "Disk read bytes on " + name;
                    String attributeNameW = "Disk write bytes on " + name;

                    processAlert(newThresholdR, attributeNameR, regR, source, String.valueOf(diskRbytes));
                    processAlert(newThresholdW, attributeNameW, regW, source, String.valueOf(diskWbytes));
                }
            }
        }
    }

    /**
     * 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 value the current value
     * @param reg the Register for the host
     * @return the threshold level breached, if any
     */
    private int checkAttributeThreshold(double value, Register reg) {
        for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
            if (reg.getThreshold(thresholdLevel) != -1.0) {
                // normal check - has the value gone *over* the threshold
                if(((double) reg.getThreshold(thresholdLevel)) < value) {
                    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 = "DiskIO";
    
    /**
     * A reference to the configuration proxy in use
     */
    private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
    
    /**
     * A HashMap of Registers (or groups of Registers), one
     * for each host we're monitoring (reads).
     */
    private HashMap _hostsR = new HashMap();
    
    /**
     * A HashMap of Registers (or groups of Registers), one
     * for each host we're monitoring (writes).
     */
    private HashMap _hostsW = new HashMap();

//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Thu Jan 15 14:10:13 2004 UTC (20 years, 4 months ago) by tdb
Branch:	MAIN
Changes since 1.2:	+3 -3 lines
Log Message:	OK - I can still program Java, I just can't remember how this works :-)
#	User	Rev	Content
1	tdb	1.1	/*
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.util.HashSet;
27			import java.util.Set;
28			import java.util.Iterator;
29			import uk.org.iscream.cms.server.client.*;
30			import uk.org.iscream.cms.server.core.*;
31			import uk.org.iscream.cms.util.*;
32			import uk.org.iscream.cms.server.componentmanager.*;
33
34			/**
35			* This Monitor watches the Disks for all machines
36			*
37	tdb	1.2	* @author $Author: tdb $
38	tdb	1.3	* @version $Id: DiskIO__Monitor.java,v 1.2 2004/01/15 13:41:47 tdb Exp $
39	tdb	1.1	*/
40			public class DiskIO__Monitor extends MonitorSkeleton {
41
42			//---FINAL ATTRIBUTES---
43
44			/**
45			* The current CVS revision of this class
46			*/
47	tdb	1.3	public final String REVISION = "$Revision: 1.2 $";
48	tdb	1.1
49			/**
50			* A description of this monitor
51			*/
52			public final String DESC = "Monitors disk IO on all hosts.";
53
54			//---STATIC METHODS---
55
56			//---CONSTRUCTORS---
57
58			//---PUBLIC METHODS---
59
60			/**
61			* Analyse a packet of data, and generate an alert if
62			* necessary.
63			*
64			* @param packet the XMLPacket to analyse
65			*/
66			public void analysePacket(XMLPacket packet) {
67			String source = packet.getParam("packet.attributes.machine_name");
68	tdb	1.3	if(!checkBooleanConfig("Host." + source, "Monitor." + _name + ".enable")) {
69	tdb	1.2	return;
70			}
71	tdb	1.1	if (!_hostsR.containsKey(source)) {
72			_hostsR.put(source, new HashMap());
73			}
74			if (!_hostsW.containsKey(source)) {
75			_hostsW.put(source, new HashMap());
76			}
77
78			HashMap diskRegistersR = (HashMap) _hostsR.get(source);
79			HashMap diskRegistersW = (HashMap) _hostsW.get(source);
80
81			// key prefix
82			String keyPrefix = "packet.diskio.p";
83
84			// a temporary holder for all the disk attributes we find
85			HashSet disks = new HashSet();
86
87			// unfortunatly we need to check the whole packet
88			// to find the disks, and then get the data attributes
89			Set packetSet = packet.getSet();
90			Iterator i = packetSet.iterator();
91			while (i.hasNext()) {
92			String dataKey = (String) i.next();
93			if(dataKey.startsWith(keyPrefix)) {
94			// pos is after "packet.diskio.p"
95			int pos = keyPrefix.length();
96			String diskNumber = dataKey.substring(pos, dataKey.indexOf('.', pos));
97			String thisDisk = keyPrefix.concat(diskNumber);
98
99			if(!disks.contains(thisDisk)) {
100			// add the disk to our list
101			disks.add(thisDisk);
102
103			String name = packet.getParam(thisDisk + ".attributes.name");
104
105			String rbytes = packet.getParam(thisDisk + ".attributes.rbytes");
106			String wbytes = packet.getParam(thisDisk + ".attributes.wbytes");
107
108			// * now process this disk *
109
110			// check if we've seen this disk before on a previous run
111			// if not, we need to create a register for it
112			if(!diskRegistersR.containsKey(name)) {
113			diskRegistersR.put(name, new Register(source, _name + ".rbytes", name));
114			}
115			if(!diskRegistersW.containsKey(name)) {
116			diskRegistersW.put(name, new Register(source, _name + ".wbytes", name));
117			}
118
119			// get the register for this disk
120			Register regR = (Register) diskRegistersR.get(name);
121			Register regW = (Register) diskRegistersW.get(name);
122
123			// get the packet data
124			int diskRbytes, diskWbytes;
125			try {
126			if(rbytes==null \|\| wbytes==null) {
127			throw new NumberFormatException("Disk data invalid");
128			}
129			diskRbytes = Integer.parseInt(rbytes);
130			diskWbytes = Integer.parseInt(wbytes);
131			} catch (NumberFormatException e) {
132			_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad diskio information: "+e);
133			// don't try to continue and process, try next disk
134			break;
135			}
136
137			int newThresholdR = checkAttributeThreshold(diskRbytes, regR);
138			int newThresholdW = checkAttributeThreshold(diskWbytes, regW);
139
140			// say which disk had the problem
141			String attributeNameR = "Disk read bytes on " + name;
142			String attributeNameW = "Disk write bytes on " + name;
143
144			processAlert(newThresholdR, attributeNameR, regR, source, String.valueOf(diskRbytes));
145			processAlert(newThresholdW, attributeNameW, regW, source, String.valueOf(diskWbytes));
146			}
147			}
148			}
149			}
150
151			/**
152			* Overrides the {@link java.lang.Object#toString() Object.toString()}
153			* method to provide clean logging (every class should have this).
154			*
155			* This uses the uk.org.iscream.cms.util.NameFormat class
156			* to format the toString()
157			*
158			* @return the name of this class and its CVS revision
159			*/
160			public String toString() {
161			return FormatName.getName(
162			_name,
163			getClass().getName(),
164			REVISION);
165			}
166
167			/**
168			* return the String representation of what the monitor does
169			*/
170			public String getDescription(){
171			return DESC;
172			}
173
174			//---PRIVATE METHODS---
175
176			/**
177			* Checks a piece of current data, and returns the
178			* threshold it breaches, if any.
179			*
180			* @param value the current value
181			* @param reg the Register for the host
182			* @return the threshold level breached, if any
183			*/
184			private int checkAttributeThreshold(double value, Register reg) {
185			for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
186			if (reg.getThreshold(thresholdLevel) != -1.0) {
187			// normal check - has the value gone over the threshold
188			if(((double) reg.getThreshold(thresholdLevel)) < value) {
189			return thresholdLevel;
190			}
191			}
192			}
193			return Alert.thresholdNORMAL;
194			}
195
196			//---ACCESSOR/MUTATOR METHODS---
197
198			/**
199			* Returns a reference to a specific Queue for this
200			* monitor. This Queue returns only the data packets
201			* (based on type) that we want too look at.
202			*
203			* @return a reference to a Queue
204			*/
205			protected Queue getQueue() {
206			return MonitorManager.getInstance().getDataQueue();
207			}
208
209			//---ATTRIBUTES---
210
211			/**
212			* This is the friendly identifier of the
213			* component this class is running in.
214			* eg, a Filter may be called "filter1",
215			* If this class does not have an owning
216			* component, a name from the configuration
217			* can be placed here. This name could also
218			* be changed to null for utility classes.
219			*/
220			private String _name = "DiskIO";
221
222			/**
223			* A reference to the configuration proxy in use
224			*/
225			private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
226
227			/**
228			* A HashMap of Registers (or groups of Registers), one
229			* for each host we're monitoring (reads).
230			*/
231			private HashMap _hostsR = new HashMap();
232
233			/**
234			* A HashMap of Registers (or groups of Registers), one
235			* for each host we're monitoring (writes).
236			*/
237			private HashMap _hostsW = new HashMap();
238
239			//---STATIC ATTRIBUTES---
240
241			}