client/monitors/UserCount__Monitor.java

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

//---IMPORTS---
import java.util.HashMap;
import uk.org.iscream.client.*;
import uk.org.iscream.core.*;
import uk.org.iscream.util.*;
import uk.org.iscream.componentmanager.*;

/**
 * This Monitor watches the logged on user count for all machines
 *
 * @author  $Author: tdb1 $
 * @version $Id: UserCount__Monitor.java,v 1.1 2001/03/23 01:17:09 tdb1 Exp $
 */
public class UserCount__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 number of logged on users.";
    
//---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) {
        // what host are we looking at
        String source = packet.getParam("packet.attributes.machine_name");
        
        // if we don't have an entry in our HashMap, make one
        if (!_hosts.containsKey(source)) {
            _hosts.put(source, new Register(source, _name));
        }
        
        // get the Register for this host
        Register reg = (Register) _hosts.get(source);
        
        // get some required bits of data
        String currentCount = packet.getParam("packet.users.count");
        String niceName = "User Count";
        int newThreshold = checkAttributeThreshold(currentCount, reg);
        
        // process an alert
        processAlert(newThreshold, niceName, reg, source, currentCount);
    }

    /**
     * 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---
    
    /**
     * 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(String attributeString, Register reg) {
        for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
            if (reg.getThreshold(thresholdLevel) != -1.0) {
                if(attributeString != null) {
                    try {
                        double attribute = Double.parseDouble(attributeString);
                        if (reg.getThreshold(thresholdLevel) < attribute) return thresholdLevel;
                    } catch (NumberFormatException e) {
                        // we got some duff data in the packet, but we shouldn't have
                        _logger.write(toString(), Logger.DEBUG, "possible errenous packet data, should be double value - " + attributeString);
                    }
                }
            }
        }
        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 = "UserCount";
    
    /**
     * A HashMap of Registers (or groups of Registers), one
     * for each host we're monitoring.
     */
    private HashMap _hosts = new HashMap();

//---STATIC ATTRIBUTES---

}
Revision:	1.2
Committed:	Fri Mar 23 02:32:49 2001 UTC (23 years, 2 months ago) by tdb
Branch:	MAIN
CVS Tags:	PROJECT_COMPLETION
Changes since 1.1:	+35 -7 lines
Log Message:	Fully javadoc'd all the monitors. Also made a few little changes here and there, removing code that had been duplicated by copying other monitors, and tidying up any silly little things (such has hardcoded integer values).
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.org.iscream.client.monitors;
3
4	//---IMPORTS---
5	import java.util.HashMap;
6	import uk.org.iscream.client.*;
7	import uk.org.iscream.core.*;
8	import uk.org.iscream.util.*;
9	import uk.org.iscream.componentmanager.*;
10
11	/**
12	* This Monitor watches the logged on user count for all machines
13	*
14	* @author $Author: tdb1 $
15	* @version $Id: UserCount__Monitor.java,v 1.1 2001/03/23 01:17:09 tdb1 Exp $
16	*/
17	public class UserCount__Monitor extends MonitorSkeleton {
18
19	//---FINAL ATTRIBUTES---
20
21	/**
22	* The current CVS revision of this class
23	*/
24	public final String REVISION = "$Revision: 1.1 $";
25
26	/**
27	* A description of this monitor
28	*/
29	public final String DESC = "Monitors number of logged on users.";
30
31	//---STATIC METHODS---
32
33	//---CONSTRUCTORS---
34
35	//---PUBLIC METHODS---
36
37	/**
38	* Analyse a packet of data, and generate an alert if
39	* necessary.
40	*
41	* @param packet the XMLPacket to analyse
42	*/
43	public void analysePacket(XMLPacket packet) {
44	// what host are we looking at
45	String source = packet.getParam("packet.attributes.machine_name");
46
47	// if we don't have an entry in our HashMap, make one
48	if (!_hosts.containsKey(source)) {
49	_hosts.put(source, new Register(source, _name));
50	}
51
52	// get the Register for this host
53	Register reg = (Register) _hosts.get(source);
54
55	// get some required bits of data
56	String currentCount = packet.getParam("packet.users.count");
57	String niceName = "User Count";
58	int newThreshold = checkAttributeThreshold(currentCount, reg);
59
60	// process an alert
61	processAlert(newThreshold, niceName, reg, source, currentCount);
62	}
63
64	/**
65	* Overrides the {@link java.lang.Object#toString() Object.toString()}
66	* method to provide clean logging (every class should have this).
67	*
68	* This uses the uk.org.iscream.util.NameFormat class
69	* to format the toString()
70	*
71	* @return the name of this class and its CVS revision
72	*/
73	public String toString() {
74	return FormatName.getName(
75	_name,
76	getClass().getName(),
77	REVISION);
78	}
79
80	/**
81	* return the String representation of what the monitor does
82	*/
83	public String getDescription(){
84	return DESC;
85	}
86
87	//---PRIVATE METHODS---
88
89	/**
90	* Checks a piece of current data, and returns the
91	* threshold it breaches, if any.
92	*
93	* @param attributeString a String representing the current data value
94	* @param reg the Register for the host
95	* @return the threshold level breached, if any
96	*/
97	private int checkAttributeThreshold(String attributeString, Register reg) {
98	for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
99	if (reg.getThreshold(thresholdLevel) != -1.0) {
100	if(attributeString != null) {
101	try {
102	double attribute = Double.parseDouble(attributeString);
103	if (reg.getThreshold(thresholdLevel) < attribute) return thresholdLevel;
104	} catch (NumberFormatException e) {
105	// we got some duff data in the packet, but we shouldn't have
106	_logger.write(toString(), Logger.DEBUG, "possible errenous packet data, should be double value - " + attributeString);
107	}
108	}
109	}
110	}
111	return Alert.thresholdNORMAL;
112	}
113
114	//---ACCESSOR/MUTATOR METHODS---
115
116	/**
117	* Returns a reference to a specific Queue for this
118	* monitor. This Queue returns only the data packets
119	* (based on type) that we want too look at.
120	*
121	* @return a reference to a Queue
122	*/
123	protected Queue getQueue() {
124	return MonitorManager.getInstance().getDataQueue();
125	}
126
127	//---ATTRIBUTES---
128
129	/**
130	* This is the friendly identifier of the
131	* component this class is running in.
132	* eg, a Filter may be called "filter1",
133	* If this class does not have an owning
134	* component, a name from the configuration
135	* can be placed here. This name could also
136	* be changed to null for utility classes.
137	*/
138	private String _name = "UserCount";
139
140	/**
141	* A HashMap of Registers (or groups of Registers), one
142	* for each host we're monitoring.
143	*/
144	private HashMap _hosts = new HashMap();
145
146	//---STATIC ATTRIBUTES---
147
148	}