Class QueueResizingEsThreadPoolExecutor
- java.lang.Object
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- java.util.concurrent.AbstractExecutorService
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- java.util.concurrent.ThreadPoolExecutor
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- org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor
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- org.elasticsearch.common.util.concurrent.QueueResizingEsThreadPoolExecutor
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- 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 theResizableBlockingQueue
according to Little's Law.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor
EsThreadPoolExecutor.ShutdownListener
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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
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Field Summary
Fields Modifier and Type Field Description static double
EWMA_ALPHA
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
afterExecute(java.lang.Runnable r, java.lang.Throwable t)
protected void
appendThreadPoolExecutorDetails(java.lang.StringBuilder sb)
Append details about this thread pool to the specifiedStringBuilder
.protected void
doExecute(java.lang.Runnable command)
int
getCurrentCapacity()
Returns the current queue capacityint
getCurrentQueueSize()
Returns the current queue size (operations that are queued)double
getTaskExecutionEWMA()
Returns the exponentially weighted moving average of the task execution time-
Methods inherited from class org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor
execute, getTasks, shutdown, terminated, toString, unwrap, wrapRunnable
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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
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Method Detail
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doExecute
protected void doExecute(java.lang.Runnable command)
- Overrides:
doExecute
in classEsThreadPoolExecutor
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getCurrentCapacity
public int getCurrentCapacity()
Returns the current queue capacity
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getTaskExecutionEWMA
public double getTaskExecutionEWMA()
Returns the exponentially weighted moving average of the task execution time
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getCurrentQueueSize
public int getCurrentQueueSize()
Returns the current queue size (operations that are queued)
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afterExecute
protected void afterExecute(java.lang.Runnable r, java.lang.Throwable t)
- Overrides:
afterExecute
in classEsThreadPoolExecutor
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appendThreadPoolExecutorDetails
protected void appendThreadPoolExecutorDetails(java.lang.StringBuilder sb)
Description copied from class:EsThreadPoolExecutor
Append details about this thread pool to the specifiedStringBuilder
. All details should be appended as key/value pairs in the form "%s = %s, "- Overrides:
appendThreadPoolExecutorDetails
in classEsThreadPoolExecutor
- Parameters:
sb
- theStringBuilder
to append to
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