KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > SimpleLoggingApp


1
2 import java.util.logging.Logger JavaDoc;
3 import java.util.logging.LogManager JavaDoc;
4 import java.util.logging.Level JavaDoc;
5 import java.util.logging.Handler JavaDoc;
6 import java.io.*;
7
8 /**
9  *
10  * @author Sean C. Sullivan
11  *
12  *
13  */
14 public class SimpleLoggingApp
15 {
16     private static final Logger JavaDoc log = Logger.getLogger(SimpleLoggingApp.class.getName());
17     private static final Logger JavaDoc root = Logger.getLogger("");
18     
19     public static void main(String JavaDoc[] args) throws java.io.IOException JavaDoc
20     {
21         // For ease of development, this application will directly
22 // configure the LogManager
23 //
24 LogManager.getLogManager().readConfiguration(getLoggingConfiguration());
25         
26         log.finest("This is a finest message");
27         log.finer("This is a finer message");
28         log.fine("This is a fine message");
29         log.config("This is a config message");
30         
31         Handler JavaDoc[] handlers = root.getHandlers();
32         StringBuffer JavaDoc sbHandlers = new StringBuffer JavaDoc();
33         sbHandlers.append("Root logger handlers: ");
34         
35         if (handlers.length < 1)
36         {
37             sbHandlers.append("none");
38         }
39         else
40         {
41             for (int i = 0; i < handlers.length; i++)
42             {
43                 sbHandlers.append(handlers[i].getClass().getName());
44                 if (i < (handlers.length - 1))
45                 {
46                     sbHandlers.append(", ");
47                 }
48             }
49         }
50         log.config(sbHandlers.toString());
51         
52         log.info("This is an info message");
53         log.warning("This is a warning message");
54         log.severe("This is a severe message");
55         
56         try
57         {
58             String JavaDoc nullObject = null;
59             nullObject.toString();
60         }
61         catch (Exception JavaDoc ex)
62         {
63             log.log(Level.SEVERE, "caught an exception", ex);
64         }
65     }
66     
67     static private java.io.InputStream JavaDoc getLoggingConfiguration()
68     {
69         StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
70         
71         sb.append("handlers=java.util.logging.ConsoleHandler,smtphandler.SMTPHandler");
72         sb.append("\n");
73         sb.append(".level= FINEST");
74         sb.append("\n");
75
76         // properties for the ConsoleHandler
77 sb.append("java.util.logging.ConsoleHandler.level=FINEST");
78         sb.append("\n");
79         sb.append("java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter");
80         sb.append("\n");
81
82         // properties for SMTPHandler
83 sb.append("smtphandler.SMTPHandler.level=WARNING");
84         sb.append("\n");
85         sb.append("smtphandler.SMTPHandler.smtpHost=127.0.0.1");
86         sb.append("\n");
87         sb.append("smtphandler.SMTPHandler.to=neo@localhost");
88         sb.append("\n");
89         sb.append("smtphandler.SMTPHandler.from=appserver@server3");
90         sb.append("\n");
91         sb.append("smtphandler.SMTPHandler.subject=[SMTPHandler] Message from SimpleApp");
92         sb.append("\n");
93         sb.append("smtphandler.SMTPHandler.bufferSize=512");
94         sb.append("\n");
95         sb.append("smtphandler.SMTPHandler.formatter=java.util.logging.SimpleFormatter");
96         sb.append("\n");
97         
98         InputStream is = new ByteArrayInputStream(sb.toString().getBytes());
99         
100         return is;
101     }
102 }
103
Popular Tags