StacktraceLoggingPatternLayout


1   package org.mmbase.util.logging.log4j;
2   import org.apache.log4j.PatternLayout;
3   import org.apache.log4j.spi.LoggingEvent;
4   
5   /**
6    * This layout can be used in logging in order to print out a stacktrace
7    * for a given logging event. THis is a very expensive call, but can be
8    * very useful when trying to find application bugs. Using this layout
9    * you will see exactly which line of code (or which JSP) generated the
10   * exception.
11   * @author Johannes Verelst
12   */
13  public class StacktraceLoggingPatternLayout extends PatternLayout {
14  
15      /**
16       * Overridden from PatternLayout; use the normal pattern to format
17       * the logevent, but also return the current stacktrace.
18       */
19      public String   format(LoggingEvent event) {
20          String   res = super.format(event);
21          Exception   e = new Exception  ();
22          StackTraceElement  [] ste = e.getStackTrace();
23          StringBuffer   trace = new StringBuffer  ();
24          for (int i=0; i<ste.length; i++) {
25            res += "\tat " + ste[i].toString() + "\n";
26          }
27          return res;
28      }
29  }
30

A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame

Popular Tags