WebmanPatternLayout


1   package de.webman.util.log4j;
2   
3   import org.apache.log4j.*;
4   import org.apache.log4j.helpers.PatternParser;
5   import org.apache.log4j.spi.LoggingEvent;
6   
7   /**
8    *
9    * Adds functionality to handle the stacktrace of throwables
10   * @see org.apache.log4j.PatternLayout
11   * @author alexander grosse
12   * @version $Revision: 1.1 $
13  */
14  public class WebmanPatternLayout extends PatternLayout 
15  {
16      final static int DEFAULT_BUFFER_SIZE = 128;
17      StringBuffer   sbuf = new StringBuffer  (DEFAULT_BUFFER_SIZE);
18      public WebmanPatternLayout() {
19          this(DEFAULT_CONVERSION_PATTERN);
20      }
21  
22    public WebmanPatternLayout(String   pattern) {
23      super(pattern);
24    }
25      
26    public PatternParser createPatternParser(String   pattern)
27    {
28      return new WebmanPatternParser(
29        pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
30    }
31    
32     public
33    String   format(LoggingEvent event) {
34  
35      sbuf.setLength(0);
36      sbuf.append(event.priority.toString());
37      sbuf.append(" - ");
38      sbuf.append(event.getMessage());
39      sbuf.append(LINE_SEP);
40      return sbuf.toString();
41    }
42    /**   
43          we do handle the throwable
44    */
45    public boolean ignoresThrowable()
46    {
47      return false;
48    }
49    
50    public
51    static void main(String  [] args) {
52      Layout layout = new WebmanPatternLayout("[exception=%#] - %m%n");
53      Category cat = Category.getInstance("some.cat");
54      cat.addAppender(new ConsoleAppender(layout));
55      Exception   e = new Exception  ("text");
56      //e.printStackTrace();
57      cat.debug("Hello, log", e);
58      cat.info("Hello again...", e);    
59    }
60  }
61
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