| 1 |
/* |
| 2 |
* i-scream central monitoring system |
| 3 |
* http://www.i-scream.org |
| 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.conient.datacomponents; |
| 23 |
|
| 24 |
//---IMPORTS--- |
| 25 |
import javax.swing.JLabel; |
| 26 |
import java.awt.GridLayout; |
| 27 |
import javax.swing.JProgressBar; |
| 28 |
import javax.swing.SwingUtilities; |
| 29 |
import uk.org.iscream.cms.util.XMLPacket; |
| 30 |
|
| 31 |
/** |
| 32 |
* This is DataComponent specifically for |
| 33 |
* displaying CPU percentages. |
| 34 |
* |
| 35 |
* It uses the JProgressBar to display the value. |
| 36 |
* |
| 37 |
* @author $Author: tdb $ |
| 38 |
* @version $Id: CPUDataComponent.java,v 1.14 2003/02/05 19:35:04 tdb Exp $ |
| 39 |
*/ |
| 40 |
public class CPUDataComponent extends VisibleDataComponent { |
| 41 |
|
| 42 |
//---FINAL ATTRIBUTES--- |
| 43 |
|
| 44 |
/** |
| 45 |
* The current CVS revision of this class |
| 46 |
*/ |
| 47 |
public final String REVISION = "$Revision: 1.14 $"; |
| 48 |
|
| 49 |
//---STATIC METHODS--- |
| 50 |
|
| 51 |
//---CONSTRUCTORS--- |
| 52 |
|
| 53 |
/** |
| 54 |
* Creates the component with a friendly name to be |
| 55 |
* used as label |
| 56 |
* |
| 57 |
* @param name the friendly name |
| 58 |
* @param attribute the data attribute we look after |
| 59 |
*/ |
| 60 |
public CPUDataComponent(String name, String attribute) { |
| 61 |
_name = name; |
| 62 |
_attribute = attribute; |
| 63 |
_label = new JLabel(_name + ": "); |
| 64 |
_label.setHorizontalAlignment(JLabel.RIGHT); |
| 65 |
setLayout(new GridLayout(1, 2)); |
| 66 |
_item.setString("-uninitialised-"); |
| 67 |
add(_label); |
| 68 |
add(_item); |
| 69 |
setVisible(false); |
| 70 |
} |
| 71 |
|
| 72 |
//---PUBLIC METHODS--- |
| 73 |
|
| 74 |
/** |
| 75 |
* This run method updates any Swing components |
| 76 |
* The setValue() method adds this component |
| 77 |
* to the Swing Event Dispatching Queue to |
| 78 |
* run this method. |
| 79 |
*/ |
| 80 |
public void run() { |
| 81 |
if(!isVisible()) { |
| 82 |
setVisible(true); |
| 83 |
} |
| 84 |
_item.setString(_cache + "%"); |
| 85 |
_item.setValue(new Double(_cache).intValue()); |
| 86 |
} |
| 87 |
|
| 88 |
/** |
| 89 |
* Overrides the {@link java.lang.Object#toString() Object.toString()} |
| 90 |
* method to provide clean logging (every class should have this). |
| 91 |
* |
| 92 |
* @return the name of this class and its CVS revision |
| 93 |
*/ |
| 94 |
public String toString() { |
| 95 |
return _name + "(" + _attribute + ")"; |
| 96 |
} |
| 97 |
|
| 98 |
//---PRIVATE METHODS--- |
| 99 |
|
| 100 |
//---ACCESSOR/MUTATOR METHODS--- |
| 101 |
|
| 102 |
/** |
| 103 |
* This takes the packet to obtain the value from, it then performs all |
| 104 |
* approriate conversions and adds this class to the Swing Event |
| 105 |
* Dispatching queue. |
| 106 |
* |
| 107 |
* @param packet the XMLPacket to get the data from |
| 108 |
* @throws DataFormatException if there was a problem converting the data for display |
| 109 |
*/ |
| 110 |
public void setValue(XMLPacket packet) throws DataFormatException { |
| 111 |
String value = packet.getParam(_attribute); |
| 112 |
try { |
| 113 |
if(!_cache.equals(value)) { |
| 114 |
_cache = value; |
| 115 |
SwingUtilities.invokeLater(this); |
| 116 |
} |
| 117 |
} catch (Exception e) { |
| 118 |
throw new DataFormatException(value + " is an invalid data type for " + toString()); |
| 119 |
} |
| 120 |
} |
| 121 |
|
| 122 |
/** |
| 123 |
* Returns the string showing the packet |
| 124 |
* attribute that the component is looking after |
| 125 |
* |
| 126 |
* @return the packet reference |
| 127 |
*/ |
| 128 |
public String getPacketAttribute() { |
| 129 |
return _attribute; |
| 130 |
} |
| 131 |
|
| 132 |
//---ATTRIBUTES--- |
| 133 |
|
| 134 |
/** |
| 135 |
* The friendly name of this component |
| 136 |
*/ |
| 137 |
private String _name; |
| 138 |
|
| 139 |
/** |
| 140 |
* The attribute that this component is concerned with |
| 141 |
*/ |
| 142 |
private String _attribute; |
| 143 |
|
| 144 |
/** |
| 145 |
* Remembers what the last value was, so we |
| 146 |
* only update if we have to. |
| 147 |
*/ |
| 148 |
protected String _cache = ""; |
| 149 |
|
| 150 |
/** |
| 151 |
* The minimum value for the percentage |
| 152 |
*/ |
| 153 |
private final int _min = 0; |
| 154 |
|
| 155 |
/** |
| 156 |
* The maximum value for the percentage |
| 157 |
*/ |
| 158 |
private final int _max = 100; |
| 159 |
|
| 160 |
/** |
| 161 |
* The friendly label for this component |
| 162 |
*/ |
| 163 |
private JLabel _label; |
| 164 |
|
| 165 |
/** |
| 166 |
* The progress bar that we will display CPU |
| 167 |
* percentage data in |
| 168 |
*/ |
| 169 |
private JProgressBar _item = new JProgressBar(JProgressBar.HORIZONTAL, _min, _max); |
| 170 |
{ |
| 171 |
_item.setStringPainted(true); |
| 172 |
} |
| 173 |
|
| 174 |
//---STATIC ATTRIBUTES--- |
| 175 |
|
| 176 |
} |
