cms/conient/PacketTimer.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.conient;

//---IMPORTS---
import java.awt.Color;
import javax.swing.JProgressBar;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.BoxLayout;
import javax.swing.SwingUtilities;

/**
 * Shows a countdown timer for packet arrival times.
 * When constructed it takes an integer value relating
 * to the time in seconds between recieving packets.
 * 
 * This then displays a JProgress bar which updates at 
 * 10th of a second intervals.
 *
 * @author  $Author: tdb $
 * @version $Id: PacketTimer.java,v 1.7 2002/05/21 16:47:10 tdb Exp $
 */
public class PacketTimer extends JPanel implements Runnable {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.7 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Constructs a new PacketTimer
     *
     * @param timeBetweenPackets the time in seconds between packet arrival
     */
    public PacketTimer(String name, int timeBetweenPackets) {
        _timeBetweenPackets = timeBetweenPackets * 1000;
        _progressBar = new JProgressBar(JProgressBar.HORIZONTAL, 0, _timeBetweenPackets);
        _barColour = _progressBar.getForeground();
        this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
        JLabel label = new JLabel(name);
        this.add(_progressBar);
        this.add(label);
    }

//---PUBLIC METHODS---
    
    /**
     * Updates the progress bar every 10th of a second.
     */
    public void run() {
        while(_running) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
            }
            
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    long t = _nextTime - System.currentTimeMillis();
                    if(t >= 0) {
                        _progressBar.setValue((int) t);
                    }
                    else {
                        _progressBar.setValue((int) (t*-1));
                        _progressBar.setForeground(Color.red);
                    }
                }
            });
        }
    }
    
    /**
     * Resets the progress bar.
     */
    public void reset() {
        _nextTime = System.currentTimeMillis() + _timeBetweenPackets;
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                _progressBar.setValue(_timeBetweenPackets);
                _progressBar.setForeground(_barColour);
            }
        });
    }
    
//---PRIVATE METHODS---

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

//---ATTRIBUTES---

    /**
     * Holds the time between packets as used internally by this class
     */
    private int _timeBetweenPackets;
    private long _nextTime;
    private Color _barColour;
    
    /**
     * Used to indicate the state of the thread
     */
    private boolean _running = true;
    
    private JProgressBar _progressBar;

//---STATIC ATTRIBUTES---

}
Revision:	1.8
Committed:	Thu Mar 6 12:15:52 2003 UTC (21 years, 2 months ago) by tdb
Branch:	MAIN
Changes since 1.7:	+17 -7 lines
Log Message:	Bring Conient in line with new ihost changes. Most obvious change is the addition of a new data component for looking at IO statistics. It looks after two attributes and displays them next to each other. Nothing fancy really, but is suitable for paging, networking, and diskio. Used this new IO data component to implement the above mentioned new data types, and altered the existing disk and memory items because of a change in the unit size. Finally, altered the "time till next packet" counter because it wasn't very accurate - it never seemed to get to zero. It's clock based now, so should be spot on. Also added a funky feature to make it go red and grow in the wrong direction when an expected packet doesn't arrive :-)
#	User	Rev	Content
1	tdb	1.6	/*
2			* i-scream central monitoring system
3	tdb	1.7	* http://www.i-scream.org.uk
4	tdb	1.6	* 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	ajm	1.2	//---PACKAGE DECLARATION---
22	tdb	1.5	package uk.org.iscream.cms.conient;
23	ajm	1.1
24	ajm	1.2	//---IMPORTS---
25	tdb	1.8	import java.awt.Color;
26	ajm	1.1	import javax.swing.JProgressBar;
27	ajm	1.4	import javax.swing.JPanel;
28			import javax.swing.JLabel;
29			import javax.swing.BoxLayout;
30	ajm	1.1	import javax.swing.SwingUtilities;
31
32	ajm	1.2	/**
33			* Shows a countdown timer for packet arrival times.
34			* When constructed it takes an integer value relating
35			* to the time in seconds between recieving packets.
36			*
37			* This then displays a JProgress bar which updates at
38			* 10th of a second intervals.
39			*
40	tdb	1.6	* @author $Author: tdb $
41	tdb	1.8	* @version $Id: PacketTimer.java,v 1.7 2002/05/21 16:47:10 tdb Exp $
42	ajm	1.2	*/
43	ajm	1.4	public class PacketTimer extends JPanel implements Runnable {
44	ajm	1.1
45	ajm	1.2	//---FINAL ATTRIBUTES---
46
47			/**
48			* The current CVS revision of this class
49			*/
50	tdb	1.8	public static final String REVISION = "$Revision: 1.7 $";
51	ajm	1.2
52			//---STATIC METHODS---
53
54			//---CONSTRUCTORS---
55
56			/**
57			* Constructs a new PacketTimer
58			*
59			* @param timeBetweenPackets the time in seconds between packet arrival
60			*/
61	ajm	1.4	public PacketTimer(String name, int timeBetweenPackets) {
62	tdb	1.8	_timeBetweenPackets = timeBetweenPackets * 1000;
63	ajm	1.4	_progressBar = new JProgressBar(JProgressBar.HORIZONTAL, 0, _timeBetweenPackets);
64	tdb	1.8	_barColour = _progressBar.getForeground();
65	ajm	1.4	this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
66			JLabel label = new JLabel(name);
67			this.add(_progressBar);
68			this.add(label);
69	ajm	1.1	}
70	ajm	1.2
71			//---PUBLIC METHODS---
72	ajm	1.1
73	ajm	1.2	/**
74			* Updates the progress bar every 10th of a second.
75			*/
76	ajm	1.1	public void run() {
77	ajm	1.2	while(_running) {
78	ajm	1.1	try {
79			Thread.sleep(100);
80			} catch (InterruptedException e) {
81			}
82
83			SwingUtilities.invokeLater(new Runnable() {
84			public void run() {
85	tdb	1.8	long t = _nextTime - System.currentTimeMillis();
86			if(t >= 0) {
87			_progressBar.setValue((int) t);
88			}
89			else {
90			_progressBar.setValue((int) (t*-1));
91			_progressBar.setForeground(Color.red);
92			}
93	ajm	1.1	}
94			});
95			}
96			}
97
98	ajm	1.2	/**
99			* Resets the progress bar.
100			*/
101	ajm	1.1	public void reset() {
102	tdb	1.8	_nextTime = System.currentTimeMillis() + _timeBetweenPackets;
103	ajm	1.1	SwingUtilities.invokeLater(new Runnable() {
104			public void run() {
105	ajm	1.4	_progressBar.setValue(_timeBetweenPackets);
106	tdb	1.8	_progressBar.setForeground(_barColour);
107	ajm	1.1	}
108			});
109			}
110
111	ajm	1.2	//---PRIVATE METHODS---
112
113			//---ACCESSOR/MUTATOR METHODS---
114
115			//---ATTRIBUTES---
116
117			/**
118			* Holds the time between packets as used internally by this class
119			*/
120	ajm	1.1	private int _timeBetweenPackets;
121	tdb	1.8	private long _nextTime;
122			private Color _barColour;
123	ajm	1.2
124			/**
125			* Used to indicate the state of the thread
126			*/
127			private boolean _running = true;
128	ajm	1.4
129			private JProgressBar _progressBar;
130	ajm	1.2
131			//---STATIC ATTRIBUTES---
132
133	ajm	1.1	}