org.compass.core.util.concurrent
Class ScalingThreadPoolExecutor

java.lang.Object
  java.util.concurrent.AbstractExecutorService
      java.util.concurrent.ThreadPoolExecutor
          org.compass.core.util.concurrent.ScalingThreadPoolExecutor

All Implemented Interfaces:

Executor, ExecutorService

public class ScalingThreadPoolExecutor
extends ThreadPoolExecutor

Extends a ThreadPoolExecutor and gives better performance when asking for the getActiveCount().

Author:

kimchy

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ThreadPoolExecutor

ThreadPoolExecutor.AbortPolicy, ThreadPoolExecutor.CallerRunsPolicy, ThreadPoolExecutor.DiscardOldestPolicy, ThreadPoolExecutor.DiscardPolicy

Constructor Summary

ScalingThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue)

Method Summary

protected void	afterExecute(Runnable r, Throwable t)
protected void	beforeExecute(Thread t, Runnable r)
int	getActiveCount()

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

awaitTermination, execute, finalize, getCompletedTaskCount, getCorePoolSize, getKeepAliveTime, getLargestPoolSize, getMaximumPoolSize, getPoolSize, getQueue, getRejectedExecutionHandler, getTaskCount, getThreadFactory, isShutdown, isTerminated, isTerminating, prestartAllCoreThreads, prestartCoreThread, purge, remove, setCorePoolSize, setKeepAliveTime, setMaximumPoolSize, setRejectedExecutionHandler, setThreadFactory, shutdown, shutdownNow, terminated

Methods inherited from class java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny, submit, submit, submit

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ScalingThreadPoolExecutor

public ScalingThreadPoolExecutor(int corePoolSize,
                                 int maximumPoolSize,
                                 long keepAliveTime,
                                 TimeUnit unit,
                                 BlockingQueue<Runnable> workQueue)

Method Detail

getActiveCount

public int getActiveCount()

Overrides:

getActiveCount in class ThreadPoolExecutor

beforeExecute

protected void beforeExecute(Thread t,
                             Runnable r)

Overrides:

beforeExecute in class ThreadPoolExecutor

afterExecute

protected void afterExecute(Runnable r,
                            Throwable t)

Overrides:

afterExecute in class ThreadPoolExecutor