client/monitors/Disk__Monitor.java

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

//---IMPORTS---
import java.util.HashMap;
import java.util.ArrayList;
import java.util.Set;
import java.util.Iterator;
import java.text.NumberFormat;
import uk.org.iscream.client.*;
import uk.org.iscream.core.*;
import uk.org.iscream.util.*;
import uk.org.iscream.componentmanager.*;

/**
 * This Monitor watches the Disks for all machines
 *
 * @author  $Author: ajm4 $
 * @version $Id: Disk__Monitor.java,v 1.2 2001/03/09 03:30:55 ajm4 Exp $
 */
public class Disk__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.2 $";
    
    public final String DESC = "Monitors all host disks.";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    public void analysePacket(XMLPacket packet) {
        if (packet.getParam("packet.attributes.type").equals("data")) {
            String source = packet.getParam("packet.attributes.machine_name");
            if (!_hosts.containsKey(source)) {
                _hosts.put(source, new HashMap());
            }
                        
            HashMap diskRegisters = (HashMap) _hosts.get(source);
            
            // a tempory holder for all the disk attributes we find
            ArrayList disks = new ArrayList();
            
            // 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("packet.disk.p")) {
                    if(!disks.contains(dataKey)) {
                        String diskNumber = "";
            
                        // pos is after "packet.disk.p"
                        int pos = 13;
                        while (dataKey.charAt(pos) != '.') {
                            diskNumber = diskNumber + dataKey.charAt(pos);
                            pos++;
                        }
                        
                        // add the disk to our list, with the packet data
                        
                        // used (we won't use this value - but we need it to forget about it ;)
                        disks.add("packet.disk.p" + diskNumber + ".attributes.used");
                        
                        // device
                        disks.add("packet.disk.p" + diskNumber + ".attributes.name");
                        String device = packet.getParam("packet.disk.p" + diskNumber + ".attributes.name");
                        // mount point
                        disks.add("packet.disk.p" + diskNumber + ".attributes.mount");
                        String mount = packet.getParam("packet.disk.p" + diskNumber + ".attributes.mount");

                        // these next two will be used to calculate the %age
                        // total
                        disks.add("packet.disk.p" + diskNumber + ".attributes.kbytes");
                        String total = packet.getParam("packet.disk.p" + diskNumber + ".attributes.kbytes");
                        // available
                        disks.add("packet.disk.p" + diskNumber + ".attributes.avail");
                        String avail = packet.getParam("packet.disk.p" + diskNumber + ".attributes.avail");

                        // *** 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(!diskRegisters.containsKey(diskNumber)) {
                            diskRegisters.put(diskNumber, new Register(source, _name));
                        }

                        // get the register for this disk
                        Register reg = (Register) diskRegisters.get(diskNumber);

                        // get the packet data
                        double diskTotal, diskAvail;
                        try {
                
                            if(total==null || avail==null) {
                                throw new NumberFormatException("Disk data invalid");
                            }
                            diskTotal = Double.parseDouble(total);
                            diskAvail = Double.parseDouble(avail);
                        } catch (NumberFormatException e) {
                            _logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad disk information: "+e);
                            // don't try to continue and process, try next disk
                            break;
                        }
            
                        // percentage of memory in use
                        double diskInUse = (1 - (diskAvail / diskTotal)) * 100;
                        int newThreshold = checkAttributeThreshold(diskInUse, reg);
            
                        // format the memoryInUse to a String
                        NumberFormat nf = NumberFormat.getInstance();
                        nf.setMaximumFractionDigits(2);
                        nf.setMinimumFractionDigits(2);
                        String strDiskInUse = nf.format(diskInUse);
  
                        // say which disk had the problem
                        String attributeName = "Disk in use % on " + mount + " (" + device + ")";
                                                
                        processAlert(newThreshold, attributeName, reg, source, strDiskInUse);
                    }
                }
            }
        }
    }

    /**
     * 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.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---

    private int checkAttributeThreshold(double diskInUse, Register reg) {
        for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
            if (reg.getThreshold(thresholdLevel) != -1.0) {
                if(((double) reg.getThreshold(thresholdLevel)) < diskInUse) {
                    return thresholdLevel;
                }
            }
        }
        return Alert.thresholdNORMAL;
    }

//---ACCESSOR/MUTATOR METHODS---

//---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 = "Disk";
    
    /**
     * A reference to the configuration proxy in use
     */
    private ConfigurationProxy _cp = ConfigurationProxy.getInstance();

    private HashMap _hosts = new HashMap();

//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Wed Mar 14 23:25:29 2001 UTC (23 years, 2 months ago) by tdb
Branch:	MAIN
Changes since 1.2:	+8 -8 lines
Log Message:	The whole server package structure has been changed. Old Package: uk.ac.ukc.iscream.* New Package: uk.org.iscream.*
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.org.iscream.client.monitors;
3
4	//---IMPORTS---
5	import java.util.HashMap;
6	import java.util.ArrayList;
7	import java.util.Set;
8	import java.util.Iterator;
9	import java.text.NumberFormat;
10	import uk.org.iscream.client.*;
11	import uk.org.iscream.core.*;
12	import uk.org.iscream.util.*;
13	import uk.org.iscream.componentmanager.*;
14
15	/**
16	* This Monitor watches the Disks for all machines
17	*
18	* @author $Author: ajm4 $
19	* @version $Id: Disk__Monitor.java,v 1.2 2001/03/09 03:30:55 ajm4 Exp $
20	*/
21	public class Disk__Monitor extends MonitorSkeleton {
22
23	//---FINAL ATTRIBUTES---
24
25	/**
26	* The current CVS revision of this class
27	*/
28	public final String REVISION = "$Revision: 1.2 $";
29
30	public final String DESC = "Monitors all host disks.";
31
32	//---STATIC METHODS---
33
34	//---CONSTRUCTORS---
35
36	//---PUBLIC METHODS---
37
38	public void analysePacket(XMLPacket packet) {
39	if (packet.getParam("packet.attributes.type").equals("data")) {
40	String source = packet.getParam("packet.attributes.machine_name");
41	if (!_hosts.containsKey(source)) {
42	_hosts.put(source, new HashMap());
43	}
44
45	HashMap diskRegisters = (HashMap) _hosts.get(source);
46
47	// a tempory holder for all the disk attributes we find
48	ArrayList disks = new ArrayList();
49
50	// unfortunatly we need to check the whole packet
51	// to find the disks, and then get the data attributes
52	Set packetSet = packet.getSet();
53	Iterator i = packetSet.iterator();
54	while (i.hasNext()) {
55	String dataKey = (String) i.next();
56	if(dataKey.startsWith("packet.disk.p")) {
57	if(!disks.contains(dataKey)) {
58	String diskNumber = "";
59
60	// pos is after "packet.disk.p"
61	int pos = 13;
62	while (dataKey.charAt(pos) != '.') {
63	diskNumber = diskNumber + dataKey.charAt(pos);
64	pos++;
65	}
66
67	// add the disk to our list, with the packet data
68
69	// used (we won't use this value - but we need it to forget about it ;)
70	disks.add("packet.disk.p" + diskNumber + ".attributes.used");
71
72	// device
73	disks.add("packet.disk.p" + diskNumber + ".attributes.name");
74	String device = packet.getParam("packet.disk.p" + diskNumber + ".attributes.name");
75	// mount point
76	disks.add("packet.disk.p" + diskNumber + ".attributes.mount");
77	String mount = packet.getParam("packet.disk.p" + diskNumber + ".attributes.mount");
78
79	// these next two will be used to calculate the %age
80	// total
81	disks.add("packet.disk.p" + diskNumber + ".attributes.kbytes");
82	String total = packet.getParam("packet.disk.p" + diskNumber + ".attributes.kbytes");
83	// available
84	disks.add("packet.disk.p" + diskNumber + ".attributes.avail");
85	String avail = packet.getParam("packet.disk.p" + diskNumber + ".attributes.avail");
86
87	// * now process this disk *
88
89	// check if we've seen this disk before on a previous run
90	// if not, we need to create a register for it
91	if(!diskRegisters.containsKey(diskNumber)) {
92	diskRegisters.put(diskNumber, new Register(source, _name));
93	}
94
95	// get the register for this disk
96	Register reg = (Register) diskRegisters.get(diskNumber);
97
98	// get the packet data
99	double diskTotal, diskAvail;
100	try {
101
102	if(total==null \|\| avail==null) {
103	throw new NumberFormatException("Disk data invalid");
104	}
105	diskTotal = Double.parseDouble(total);
106	diskAvail = Double.parseDouble(avail);
107	} catch (NumberFormatException e) {
108	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad disk information: "+e);
109	// don't try to continue and process, try next disk
110	break;
111	}
112
113	// percentage of memory in use
114	double diskInUse = (1 - (diskAvail / diskTotal)) * 100;
115	int newThreshold = checkAttributeThreshold(diskInUse, reg);
116
117	// format the memoryInUse to a String
118	NumberFormat nf = NumberFormat.getInstance();
119	nf.setMaximumFractionDigits(2);
120	nf.setMinimumFractionDigits(2);
121	String strDiskInUse = nf.format(diskInUse);
122
123	// say which disk had the problem
124	String attributeName = "Disk in use % on " + mount + " (" + device + ")";
125
126	processAlert(newThreshold, attributeName, reg, source, strDiskInUse);
127	}
128	}
129	}
130	}
131	}
132
133	/**
134	* Overrides the {@link java.lang.Object#toString() Object.toString()}
135	* method to provide clean logging (every class should have this).
136	*
137	* This uses the uk.org.iscream.util.NameFormat class
138	* to format the toString()
139	*
140	* @return the name of this class and its CVS revision
141	*/
142	public String toString() {
143	return FormatName.getName(
144	_name,
145	getClass().getName(),
146	REVISION);
147	}
148
149	/**
150	* return the String representation of what the monitor does
151	*/
152	public String getDescription(){
153	return DESC;
154	}
155
156	//---PRIVATE METHODS---
157
158	private int checkAttributeThreshold(double diskInUse, Register reg) {
159	for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
160	if (reg.getThreshold(thresholdLevel) != -1.0) {
161	if(((double) reg.getThreshold(thresholdLevel)) < diskInUse) {
162	return thresholdLevel;
163	}
164	}
165	}
166	return Alert.thresholdNORMAL;
167	}
168
169	//---ACCESSOR/MUTATOR METHODS---
170
171	//---ATTRIBUTES---
172
173	/**
174	* This is the friendly identifier of the
175	* component this class is running in.
176	* eg, a Filter may be called "filter1",
177	* If this class does not have an owning
178	* component, a name from the configuration
179	* can be placed here. This name could also
180	* be changed to null for utility classes.
181	*/
182	private String _name = "Disk";
183
184	/**
185	* A reference to the configuration proxy in use
186	*/
187	private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
188
189	private HashMap _hosts = new HashMap();
190
191	//---STATIC ATTRIBUTES---
192
193	}