## org.apache.tools.ant.listener
Class Log4jListener

    java.lang.Object
      |
      +--org.apache.tools.ant.listener.Log4jListener

All Implemented Interfaces:
  BuildListener, java.util.EventListener

public class Log4jListener
extends java.lang.Object
implements BuildListener

Listener which sends events to Log4j logging system

Constructor Summary
`Log4jListener()` Construct the listener and make sure there is a valid appender.

Method Summary
`void` `buildFinished(BuildEvent event)` Signals that the last target has finished.
`void` `buildStarted(BuildEvent event)` Signals that a build has started.
`void` `messageLogged(BuildEvent event)` Signals a message logging event.
`void` `targetFinished(BuildEvent event)` Signals that a target has finished.
`void` `targetStarted(BuildEvent event)` Signals that a target is starting.
`void` `taskFinished(BuildEvent event)` Signals that a task has finished.
`void` `taskStarted(BuildEvent event)` Signals that a task is starting.

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

Constructor Detail

### Log4jListener

    public Log4jListener()

  Construct the listener and make sure there is a valid appender.

Method Detail

### buildStarted

    public void buildStarted(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals that a build has started. This event is fired before any targets have started.

  Specified by:
    `buildStarted` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.buildStarted(org.apache.tools.ant.BuildEvent)`

### buildFinished

    public void buildFinished(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals that the last target has finished. This event will still be fired if an error occurred during the build.

  Specified by:
    `buildFinished` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.buildFinished(org.apache.tools.ant.BuildEvent)`

### targetStarted

    public void targetStarted(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals that a target is starting.

  Specified by:
    `targetStarted` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.targetStarted(org.apache.tools.ant.BuildEvent)`

### targetFinished

    public void targetFinished(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals that a target has finished. This event will still be fired if an error occurred during the build.

  Specified by:
    `targetFinished` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.targetFinished(org.apache.tools.ant.BuildEvent)`

### taskStarted

    public void taskStarted(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals that a task is starting.

  Specified by:
    `taskStarted` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.taskStarted(org.apache.tools.ant.BuildEvent)`

### taskFinished

    public void taskFinished(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals that a task has finished. This event will still be fired if an error occurred during the build.

  Specified by:
    `taskFinished` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.taskFinished(org.apache.tools.ant.BuildEvent)`

### messageLogged

    public void messageLogged(BuildEvent event)

  Description copied from interface: `BuildListener`
  Signals a message logging event.

  Specified by:
    `messageLogged` in interface `BuildListener`
  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildListener.messageLogged(org.apache.tools.ant.BuildEvent)`

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