org.apache.log4j
Class Layout

java.lang.Object
  extended by org.apache.log4j.Layout
All Implemented Interfaces:
OptionHandler
Direct Known Subclasses:
DateLayout, EnhancedPatternLayout, HTMLLayout, PatternLayout, SimpleLayout, XMLLayout

public abstract class Layout
extends Object
implements OptionHandler

Extend this abstract class to create your own log layout format.

Author:
Ceki Gülcü

Field Summary
static String LINE_SEP
           
static int LINE_SEP_LEN
           
 
Constructor Summary
Layout()
           
 
Method Summary
abstract  String format(LoggingEvent event)
          Implement this method to create your own layout format.
 String getContentType()
          Returns the content type output by this layout.
 String getFooter()
          Returns the footer for the layout format.
 String getHeader()
          Returns the header for the layout format.
abstract  boolean ignoresThrowable()
          If the layout handles the throwable object contained within LoggingEvent, then the layout should return false.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.log4j.spi.OptionHandler
activateOptions
 

Field Detail

LINE_SEP

public static final String LINE_SEP

LINE_SEP_LEN

public static final int LINE_SEP_LEN
Constructor Detail

Layout

public Layout()
Method Detail

format

public abstract String format(LoggingEvent event)
Implement this method to create your own layout format.


getContentType

public String getContentType()
Returns the content type output by this layout. The base class returns "text/plain".


getHeader

public String getHeader()
Returns the header for the layout format. The base class returns null.


getFooter

public String getFooter()
Returns the footer for the layout format. The base class returns null.


ignoresThrowable

public abstract boolean ignoresThrowable()
If the layout handles the throwable object contained within LoggingEvent, then the layout should return false. Otherwise, if the layout ignores throwable object, then the layout should return true. If ignoresThrowable is true, the appender is responsible for rendering the throwable.

The SimpleLayout, TTCCLayout, PatternLayout all return true. The XMLLayout returns false.

Since:
0.8.4


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