client/monitors/Queue__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 internal server queues.
 * YES! this system is SO great it monitors itself!
 *
 * @author  $Author: ajm4 $
 * @version $Id: Queue__Monitor.java,v 1.2 2001/03/22 01:55:18 ajm4 Exp $
 */
public class Queue__Monitor extends MonitorSkeleton {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.2 $";
    
    public final String DESC = "Who watches the watchmen?";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    public void analysePacket(XMLPacket packet) {
        if (packet.getParam("packet.attributes.type").equals("queueStat")) {
            String source = packet.getParam("packet.attributes.hashCode");
            if (!_hosts.containsKey(source)) {
                _hosts.put(source, new HashMap());
            }
                        
            HashMap queueRegisters = (HashMap) _hosts.get(source);
            
            // get info about the source queue class instance
            String queueName = packet.getParam("packet.attributes.name");
            String maxQueueSize = packet.getParam("packet.queue.attributes.maxSize");
            // unfortunatly we need to check the whole packet
            // to find the queues, 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.queue.attributes.queue")) {
                    String queueSize = packet.getParam(dataKey);

                    // *** now process this queue ***

                    // check if we've seen this queue before on a previous run
                    // if not, we need to create a register for it
                    if(!queueRegisters.containsKey(dataKey)) {
                        queueRegisters.put(dataKey, new Register(source, _name));
                    }

                    // get the register for this disk
                    Register reg = (Register) queueRegisters.get(dataKey);

                    // get the packet data
                    double qMax, qSize;
                    try {
            
                        if(maxQueueSize==null || queueSize==null) {
                            throw new NumberFormatException("Queue data invalid");
                        }
                        qMax = Double.parseDouble(maxQueueSize);
                        qSize = Double.parseDouble(queueSize);
                    } catch (NumberFormatException e) {
                        _logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad queue information: "+e);
                        // don't try to continue and process, try next queue
                        break;
                    }
                    
                    boolean useValue = false;
                    try {
                        String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure");
                        if (option.equals("VALUE")) {
                            useValue = true;
                        }                            
                    } catch (PropertyNotFoundException e) {
                        // we default to percentage
                    }
                    
                    // this  bit determines if the disk check is a % check
                    // or a kb check
                    double checkValue;
                    String type;
                    if(useValue) {
                        // kb disk in use
                        checkValue = qSize;
                        type = "count";
                    } else {
                        // % disk in use
                        checkValue = (qSize / qMax) * 100;
                        type = "%";
                    }
                    
                    int newThreshold = checkAttributeThreshold(checkValue, reg);
        
                    // format the checkValue to a String
                    NumberFormat nf = NumberFormat.getInstance();
                    nf.setMaximumFractionDigits(2);
                    nf.setMinimumFractionDigits(2);
                    String strCheckValue = nf.format(checkValue);

                    // say which disk had the problem
                    String attributeName = "Size of queue " + type + " in " + queueName;
                                            
                    processAlert(newThreshold, attributeName, reg, source, strCheckValue);
                   
                }
            }
        }
    }

    /**
     * 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 qSize, Register reg) {
        for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
            if (reg.getThreshold(thresholdLevel) != -1.0) {
                if(((double) reg.getThreshold(thresholdLevel)) < qSize) {
                    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 = "Queue";
    
    /**
     * A reference to the configuration proxy in use
     */
    private ConfigurationProxy _cp = ConfigurationProxy.getInstance();

    private HashMap _hosts = new HashMap();

//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Thu Mar 22 17:32:34 2001 UTC (23 years, 2 months ago) by tdb
Branch:	MAIN
Changes since 1.2:	+4 -6 lines
Log Message:	Some major bugs in here meaning it would never actually look at queueStat the queueStat packets!
#	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 internal server queues.
17	* YES! this system is SO great it monitors itself!
18	*
19	* @author $Author: ajm4 $
20	* @version $Id: Queue__Monitor.java,v 1.2 2001/03/22 01:55:18 ajm4 Exp $
21	*/
22	public class Queue__Monitor extends MonitorSkeleton {
23
24	//---FINAL ATTRIBUTES---
25
26	/**
27	* The current CVS revision of this class
28	*/
29	public final String REVISION = "$Revision: 1.2 $";
30
31	public final String DESC = "Who watches the watchmen?";
32
33	//---STATIC METHODS---
34
35	//---CONSTRUCTORS---
36
37	//---PUBLIC METHODS---
38
39	public void analysePacket(XMLPacket packet) {
40	if (packet.getParam("packet.attributes.type").equals("queueStat")) {
41	String source = packet.getParam("packet.attributes.hashCode");
42	if (!_hosts.containsKey(source)) {
43	_hosts.put(source, new HashMap());
44	}
45
46	HashMap queueRegisters = (HashMap) _hosts.get(source);
47
48	// get info about the source queue class instance
49	String queueName = packet.getParam("packet.attributes.name");
50	String maxQueueSize = packet.getParam("packet.queue.attributes.maxSize");
51	// unfortunatly we need to check the whole packet
52	// to find the queues, and then get the data attributes
53	Set packetSet = packet.getSet();
54	Iterator i = packetSet.iterator();
55
56	while (i.hasNext()) {
57	String dataKey = (String) i.next();
58	if(dataKey.startsWith("packet.queue.attributes.queue")) {
59	String queueSize = packet.getParam(dataKey);
60
61	// * now process this queue *
62
63	// check if we've seen this queue before on a previous run
64	// if not, we need to create a register for it
65	if(!queueRegisters.containsKey(dataKey)) {
66	queueRegisters.put(dataKey, new Register(source, _name));
67	}
68
69	// get the register for this disk
70	Register reg = (Register) queueRegisters.get(dataKey);
71
72	// get the packet data
73	double qMax, qSize;
74	try {
75
76	if(maxQueueSize==null \|\| queueSize==null) {
77	throw new NumberFormatException("Queue data invalid");
78	}
79	qMax = Double.parseDouble(maxQueueSize);
80	qSize = Double.parseDouble(queueSize);
81	} catch (NumberFormatException e) {
82	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad queue information: "+e);
83	// don't try to continue and process, try next queue
84	break;
85	}
86
87	boolean useValue = false;
88	try {
89	String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure");
90	if (option.equals("VALUE")) {
91	useValue = true;
92	}
93	} catch (PropertyNotFoundException e) {
94	// we default to percentage
95	}
96
97	// this bit determines if the disk check is a % check
98	// or a kb check
99	double checkValue;
100	String type;
101	if(useValue) {
102	// kb disk in use
103	checkValue = qSize;
104	type = "count";
105	} else {
106	// % disk in use
107	checkValue = (qSize / qMax) * 100;
108	type = "%";
109	}
110
111	int newThreshold = checkAttributeThreshold(checkValue, reg);
112
113	// format the checkValue to a String
114	NumberFormat nf = NumberFormat.getInstance();
115	nf.setMaximumFractionDigits(2);
116	nf.setMinimumFractionDigits(2);
117	String strCheckValue = nf.format(checkValue);
118
119	// say which disk had the problem
120	String attributeName = "Size of queue " + type + " in " + queueName;
121
122	processAlert(newThreshold, attributeName, reg, source, strCheckValue);
123
124	}
125	}
126	}
127	}
128
129	/**
130	* Overrides the {@link java.lang.Object#toString() Object.toString()}
131	* method to provide clean logging (every class should have this).
132	*
133	* This uses the uk.org.iscream.util.NameFormat class
134	* to format the toString()
135	*
136	* @return the name of this class and its CVS revision
137	*/
138	public String toString() {
139	return FormatName.getName(
140	_name,
141	getClass().getName(),
142	REVISION);
143	}
144
145	/**
146	* return the String representation of what the monitor does
147	*/
148	public String getDescription(){
149	return DESC;
150	}
151
152	//---PRIVATE METHODS---
153
154	private int checkAttributeThreshold(double qSize, Register reg) {
155	for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
156	if (reg.getThreshold(thresholdLevel) != -1.0) {
157	if(((double) reg.getThreshold(thresholdLevel)) < qSize) {
158	return thresholdLevel;
159	}
160	}
161	}
162	return Alert.thresholdNORMAL;
163	}
164
165	//---ACCESSOR/MUTATOR METHODS---
166
167	//---ATTRIBUTES---
168
169	/**
170	* This is the friendly identifier of the
171	* component this class is running in.
172	* eg, a Filter may be called "filter1",
173	* If this class does not have an owning
174	* component, a name from the configuration
175	* can be placed here. This name could also
176	* be changed to null for utility classes.
177	*/
178	private String _name = "Queue";
179
180	/**
181	* A reference to the configuration proxy in use
182	*/
183	private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
184
185	private HashMap _hosts = new HashMap();
186
187	//---STATIC ATTRIBUTES---
188
189	}