AntPerformanceListener (Ant Contrib)
Keywords: net.sf.antcontrib.perf.AntPerformanceListener,AntPerformanceListener class

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## net.sf.antcontrib.perf
Class AntPerformanceListener

    java.lang.Object
      |
      +--net.sf.antcontrib.perf.AntPerformanceListener

All Implemented Interfaces:
  org.apache.tools.ant.BuildListener, java.util.EventListener

public class AntPerformanceListener
extends java.lang.Object
implements org.apache.tools.ant.BuildListener

This BuildListener keeps track of the total time it takes for each target and task to execute, then prints out the totals when the build is finished. This can help pinpoint the areas where a build is taking a lot of time so optimization efforts can focus where they'll do the most good. Execution times are grouped by targets and tasks, and are sorted from fastest running to slowest running. Output can be saved to a file by setting a property in Ant. Set "performance.log" to the name of a file. This can be set either on the command line with the -D option (-Dperformance.log=/tmp/performance.log) or in the build file itself ().

Developed for use with Antelope, migrated to ant-contrib Oct 2003.

Version:
  $Revision: 1.2 $
Author:
  Dale Anson, danson@germane-software.com

Nested Class Summary
`class` | `AntPerformanceListener.StopWatch` A stopwatch, useful for 'quick and dirty' performance testing.
`class` | `AntPerformanceListener.StopWatchComparator` Compares the total times for two StopWatches.

Constructor Summary
`AntPerformanceListener()`

Method Summary
`void` | `buildFinished(org.apache.tools.ant.BuildEvent be)` Sorts and prints the results.
`void` | `buildStarted(org.apache.tools.ant.BuildEvent be)` Starts a 'running total' stopwatch.
`static void` | `main(java.lang.String[] args)`
`void` | `messageLogged(org.apache.tools.ant.BuildEvent be)` no-op
`void` | `targetFinished(org.apache.tools.ant.BuildEvent be)` Stop timing the given target.
`void` | `targetStarted(org.apache.tools.ant.BuildEvent be)` Start timing the given target.
`void` | `taskFinished(org.apache.tools.ant.BuildEvent be)` Stop timing the given task.
`void` | `taskStarted(org.apache.tools.ant.BuildEvent be)` Start timing the given task.

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

Constructor Detail

### AntPerformanceListener

    public AntPerformanceListener()

Method Detail

### buildStarted

    public void buildStarted(org.apache.tools.ant.BuildEvent be)

  Starts a 'running total' stopwatch.

  Specified by:
    `buildStarted` in interface `org.apache.tools.ant.BuildListener`

### buildFinished

    public void buildFinished(org.apache.tools.ant.BuildEvent be)

  Sorts and prints the results.

  Specified by:
    `buildFinished` in interface `org.apache.tools.ant.BuildListener`

### targetStarted

    public void targetStarted(org.apache.tools.ant.BuildEvent be)

  Start timing the given target.

  Specified by:
    `targetStarted` in interface `org.apache.tools.ant.BuildListener`

### targetFinished

    public void targetFinished(org.apache.tools.ant.BuildEvent be)

  Stop timing the given target.

  Specified by:
    `targetFinished` in interface `org.apache.tools.ant.BuildListener`

### taskStarted

    public void taskStarted(org.apache.tools.ant.BuildEvent be)

  Start timing the given task.

  Specified by:
    `taskStarted` in interface `org.apache.tools.ant.BuildListener`

### taskFinished

    public void taskFinished(org.apache.tools.ant.BuildEvent be)

  Stop timing the given task.

  Specified by:
    `taskFinished` in interface `org.apache.tools.ant.BuildListener`

### messageLogged

    public void messageLogged(org.apache.tools.ant.BuildEvent be)

  no-op

  Specified by:
    `messageLogged` in interface `org.apache.tools.ant.BuildListener`

### main

    public static void main(java.lang.String[] args)

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