Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| Log4j 1.2.14
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.apache.log4j.varia
Class NullAppender

    java.lang.Object
      |
      +--org.apache.log4j.AppenderSkeleton
            |
            +--org.apache.log4j.varia.NullAppender

All Implemented Interfaces:
  Appender, OptionHandler

public class NullAppender
extends AppenderSkeleton

A NullAppender merely exists, it never outputs a message to any device.

Author:
  Ceki Gülc¨

Fields inherited from class org.apache.log4j.AppenderSkeleton
`closed, errorHandler, headFilter, layout, name, tailFilter, threshold`

Constructor Summary
`NullAppender()`

Method Summary
`void` | `activateOptions()` There are no options to acticate.
`protected void` | `append(LoggingEvent event)` Does not do anything.
`void` | `close()` Release any resources allocated within the appender such as file handles, network connections, etc.
`void` | `doAppend(LoggingEvent event)` Does not do anything.
`NullAppender` | `getInstance()` Whenever you can, use this method to retreive an instance instead of instantiating a new one with `new`.
`boolean` | `requiresLayout()` NullAppenders do not need a layout.

Methods inherited from class org.apache.log4j.AppenderSkeleton
`addFilter, clearFilters, finalize, getErrorHandler, getFilter, getFirstFilter, getLayout, getName, getThreshold, isAsSevereAsThreshold, setErrorHandler, setLayout, setName, setThreshold`

Methods inherited from class java.lang.Object
`clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### NullAppender

    public NullAppender()

Method Detail

### activateOptions

    public void activateOptions()

  There are no options to acticate.
  Overrides:
    `activateOptions` in class `AppenderSkeleton`

### getInstance

    public NullAppender getInstance()

  Whenever you can, use this method to retreive an instance instead of instantiating a new one with `new`.

### close

    public void close()

  Description copied from interface: `Appender`
  Release any resources allocated within the appender such as file handles, network connections, etc.

  It is a programming error to append to a closed appender.

### doAppend

    public void doAppend(LoggingEvent event)

  Does not do anything.
  Overrides:
    `doAppend` in class `AppenderSkeleton`

### append

    protected void append(LoggingEvent event)

  Does not do anything.
  Overrides:
    `append` in class `AppenderSkeleton`

### requiresLayout

    public boolean requiresLayout()

  NullAppenders do not need a layout.

Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| Log4j 1.2.14
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Copyright 2000-2005 Apache Software Foundation.