alluxio.worker.job.task

Class PausableThreadPoolExecutor

java.lang.Object

java.util.concurrent.AbstractExecutorService

java.util.concurrent.ThreadPoolExecutor

alluxio.worker.job.task.PausableThreadPoolExecutor

All Implemented Interfaces:

Executor, ExecutorService

public class PausableThreadPoolExecutor
extends ThreadPoolExecutor

ThreadPoolExecutor that can be temporarily paused to prevent any threads from executing new tasks.

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor and Description
PausableThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory) Copy of one of the constructors in ThreadPoolExecutor.

Method Summary

Modifier and Type	Method and Description
protected void	beforeExecute(Thread t, Runnable r)
int	getNumActiveTasks()
void	pause() Pause all threads from executing new tasks.
void	resume() Resume all threads to run new tasks.

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

afterExecute, allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, execute, finalize, getActiveCount, 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, toString

Methods inherited from class java.util.concurrent.AbstractExecutorService

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

Methods inherited from class java.lang.Object

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

Constructor Detail

PausableThreadPoolExecutor

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

Copy of one of the constructors in ThreadPoolExecutor.

Parameters:

corePoolSize - the core pool size

maximumPoolSize - the maximum pool size

keepAliveTime - the keep alive time

unit - the unit

workQueue - the work queue

threadFactory - the thread factory

Method Detail

getNumActiveTasks

public int getNumActiveTasks()

Returns:

number of active threads subtracted by the number of tasks paused

pause

public void pause()

Pause all threads from executing new tasks.

resume

public void resume()

Resume all threads to run new tasks.

beforeExecute

protected void beforeExecute(Thread t,
                             Runnable r)

Overrides:

beforeExecute in class ThreadPoolExecutor