org.elasticsearch.common.util.concurrent

Class QueueResizingEsThreadPoolExecutor

java.lang.Object

java.util.concurrent.AbstractExecutorService

java.util.concurrent.ThreadPoolExecutor

org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor

org.elasticsearch.common.util.concurrent.QueueResizingEsThreadPoolExecutor

All Implemented Interfaces:

java.util.concurrent.Executor, java.util.concurrent.ExecutorService

public final class QueueResizingEsThreadPoolExecutor
extends EsThreadPoolExecutor

An extension to thread pool executor, which automatically adjusts the queue size of the ResizableBlockingQueue according to Little's Law.

Nested Class Summary

Nested classes/interfaces inherited from class org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor

EsThreadPoolExecutor.ShutdownListener

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

java.util.concurrent.ThreadPoolExecutor.AbortPolicy, java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardPolicy

Field Summary

Fields

Modifier and Type	Field and Description
static double	EWMA_ALPHA

Fields inherited from class org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor

name

Method Summary

Modifier and Type	Method and Description
protected void	afterExecute(java.lang.Runnable r, java.lang.Throwable t)
protected void	doExecute(java.lang.Runnable command)
int	getCurrentCapacity() Returns the current queue capacity
int	getCurrentQueueSize() Returns the current queue size (operations that are queued)
double	getTaskExecutionEWMA() Returns the exponentially weighted moving average of the task execution time
java.lang.String	toString()

Methods inherited from class org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor

execute, getTasks, shutdown, terminated, unwrap, wrapRunnable

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, beforeExecute, 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

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

Field Detail

EWMA_ALPHA

public static double EWMA_ALPHA

Method Detail

doExecute

protected void doExecute(java.lang.Runnable command)

Overrides:

doExecute in class EsThreadPoolExecutor

getCurrentCapacity

public int getCurrentCapacity()

Returns the current queue capacity

getTaskExecutionEWMA

public double getTaskExecutionEWMA()

Returns the exponentially weighted moving average of the task execution time

getCurrentQueueSize

public int getCurrentQueueSize()

Returns the current queue size (operations that are queued)

afterExecute

protected void afterExecute(java.lang.Runnable r,
                            java.lang.Throwable t)

Overrides:

afterExecute in class EsThreadPoolExecutor

toString

public java.lang.String toString()

Overrides:

toString in class EsThreadPoolExecutor