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Java > Open Source Codes > org > apache > log4j > gui > examples > LogTextPanelExample


1 /*
2  * Copyright 1999-2005 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.log4j.gui.examples;
17
18 import javax.swing.*;
19 import java.awt.*;
20 import java.awt.event.*;
21
22 import org.apache.log4j.*;
23 import org.apache.log4j.gui.TextPanelAppender;
24
25 public class LogTextPanelExample {
26   boolean packFrame = false;
27
28   String JavaDoc catName = "dum.cat.name";
29
30   public LogTextPanelExample() {
31
32     // setup the logging
33 TextPanelAppender tpa = new TextPanelAppender(new PatternLayout("%-5p %d [%t]: %m%n"), "logTextPanel");
34     tpa.setThreshold(Priority.DEBUG);
35     Category cat = Category.getInstance(catName);
36     cat.addAppender(tpa);
37
38     LogFrame frame = new LogFrame(tpa);
39     frame.validate();
40
41     //Center the frame (window), and show it
42 Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
43     Dimension frameSize = frame.getSize();
44     if (frameSize.height > screenSize.height) {
45       frameSize.height = screenSize.height;
46     }
47     if (frameSize.width > screenSize.width) {
48       frameSize.width = screenSize.width;
49     }
50     frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
51     frame.setVisible(true);
52   }
53
54   /**Main method*/
55   public static void main(String JavaDoc[] args) {
56     try {
57       UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
58     }
59     catch(Exception JavaDoc e) {
60       e.printStackTrace();
61     }
62     LogTextPanelExample foo = new LogTextPanelExample();
63     new LogTextPanelExampleGenThread(foo.catName);
64   }
65 }
66
67 class LogFrame extends JFrame {
68
69   public LogFrame(TextPanelAppender tpa) {
70     enableEvents(AWTEvent.WINDOW_EVENT_MASK);
71     JPanel contentPane = (JPanel) this.getContentPane();
72     contentPane.setLayout(new BorderLayout());
73     this.setSize(new Dimension(600, 400));
74     this.setTitle("LogTextPanel Example");
75     contentPane.add(tpa.getLogTextPanel(), BorderLayout.CENTER);
76   }
77
78   // exit when window is closed
79 protected void processWindowEvent(WindowEvent e) {
80     super.processWindowEvent(e);
81     if (e.getID() == WindowEvent.WINDOW_CLOSING) {
82       System.exit(0);
83     }
84   }
85 }
86
87 class LogTextPanelExampleGenThread extends Thread JavaDoc {
88
89   String JavaDoc catName;
90
91   public LogTextPanelExampleGenThread(String JavaDoc catName) {
92     this.catName = catName;
93     this.setPriority(Thread.NORM_PRIORITY - 1);
94     this.start();
95   }
96
97   public void run() {
98     Category cat = Category.getInstance(catName);
99     int cnt = 0;
100     while(true) {
101       cnt++;
102       int randEvt = (int)(Math.random() * 125);
103       if(randEvt < 3)
104         cat.fatal("{" + cnt + "} Something screwed up bad.");
105       else if(randEvt < 10)
106         cat.error("{" + cnt + "} An error occured while trying to delete all of your files.");
107       else if(randEvt < 25)
108         cat.warn("{" + cnt + "} It seems as if your hard disk is getting full.");
109       else if(randEvt < 55)
110         cat.info("{" + cnt + "} It is now time for tea.");
111       else if(randEvt < 65)
112         cat.debug("{" + cnt + "} Something bad is happening on line 565 of com.foo.Crap");
113       else if(randEvt < 75)
114         cat.debug("{" + cnt + "} Input value for xe343dd is not equal to xe39dfd!");
115       else if(randEvt < 85)
116         cat.debug("{" + cnt + "} Successfully reached line 2312 of com.foo.Goo");
117       else if(randEvt < 105)
118         cat.debug("{" + cnt + "} Here is some extra handy debugging information for you.");
119       else if(randEvt < 115)
120         cat.debug("{" + cnt + "} The file you are about to write to is not open.");
121       else if(randEvt < 125)
122         cat.debug("{" + cnt + "} The input value to the method was <null>.");
123
124       try {
125         Thread.sleep(10);
126       }
127       catch(Exception JavaDoc e) {}
128
129     }
130   }
131 }
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