org.apache.tools.ant.listener

## Class Log4jListener

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

- All Implemented Interfaces:
    java.util.EventListener, BuildListener

      public class Log4jListener
      extends java.lang.Object
      implements BuildListener

  Listener which sends events to Log4j logging system

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static java.lang.String` | `LOG_ANT` log category we log into

  - ### Constructor Summary

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

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `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`

- - ### Field Detail

    - #### LOG_ANT

          public static final java.lang.String LOG_ANT

      log category we log into
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### Log4jListener

          public Log4jListener()

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

  - ### Method Detail

    - #### buildStarted

          public void buildStarted(BuildEvent event)

      Signals that a build has started. This event is fired before any targets have started.

      This event is fired before the project instance is fully configured. In particular no properties have been set and the project may not know its name or default target, yet.

      .
      Specified by:
        `buildStarted` in interface `BuildListener`
      Parameters:
        `event` - An event with any relevant extra information. Must not be `null`.

    - #### buildFinished

          public void buildFinished(BuildEvent event)

      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:
        `BuildEvent.getException()`

    - #### targetStarted

          public void targetStarted(BuildEvent event)

      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:
        `BuildEvent.getTarget()`

    - #### targetFinished

          public void targetFinished(BuildEvent event)

      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:
        `BuildEvent.getException()`

    - #### taskStarted

          public void taskStarted(BuildEvent event)

      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:
        `BuildEvent.getTask()`

    - #### taskFinished

          public void taskFinished(BuildEvent event)

      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:
        `BuildEvent.getException()`

    - #### messageLogged

          public void messageLogged(BuildEvent event)

      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:
        `BuildEvent.getMessage()`, `BuildEvent.getException()`, `BuildEvent.getPriority()`