## org.apache.tools.ant
Interface BuildListener

All Superinterfaces:
  java.util.EventListener

All Known Subinterfaces:
  BuildLogger

All Known Implementing Classes:
  AntClassLoader, AntSoundPlayer, CommonsLoggingListener, DefaultLogger, IntrospectionHelper, Log4jListener, RecorderEntry, XmlLogger

public interface BuildListener
extends java.util.EventListener

Instances of classes that implement this interface can register to be notified when things happened during a build.

Author:
  Matt Foemmel
See Also:
  `BuildEvent`, `Project.addBuildListener(BuildListener)`

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.

Method Detail

### buildStarted

    public void buildStarted(BuildEvent event)

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

  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.

  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.

  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.

  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.

  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.

  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.

  Parameters:
    `event` - An event with any relevant extra information. Must not be `null`.
  See Also:
    `BuildEvent.getMessage()`, `BuildEvent.getPriority()`

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