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 1.1 2003/03/09 21:49:13 tdb Exp $
 */
public class DiskIO__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.1 $";
    
    /**
     * 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(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:	1.2
Committed:	Thu Jan 15 13:41:47 2004 UTC (20 years, 4 months ago) by tdb
Branch:	MAIN
Changes since 1.1:	+5 -2 lines
Log Message:	Assuming I can still program in Java, these changes allow monitoring to be disabled at a per-host level or a per-host-per-monitor level.
#	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.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	* @author $Author: tdb $
38	* @version $Id: DiskIO__Monitor.java,v 1.1 2003/03/09 21:49:13 tdb Exp $
39	*/
40	public class DiskIO__Monitor extends MonitorSkeleton {
41
42	//---FINAL ATTRIBUTES---
43
44	/**
45	* The current CVS revision of this class
46	*/
47	public final String REVISION = "$Revision: 1.1 $";
48
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	if(!checkBooleanConfig(source, "Monitor." + _name + ".enable")) {
69	return;
70	}
71	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	}