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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.scheduling.backportconcurrent

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.springframework.scheduling.backportconcurrent .ThreadPoolTaskExecutor

ThreadPoolTaskExecutor

public class ThreadPoolTaskExecutor implements SchedulingTaskExecutor,Executor,BeanNameAware,InitializingBean,DisposableBean(Code)

JavaBean that allows for configuring a JSR-166 backport edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor in bean style (through its "corePoolSize", "maxPoolSize", "keepAliveSeconds", "queueCapacity" properties), exposing it as a Spring org.springframework.core.task.TaskExecutor . This is an alternative to configuring a ThreadPoolExecutor instance directly using constructor injection, with a separate ConcurrentTaskExecutor adapter wrapping it.

For any custom needs, in particular for defining a edu.emory.mathcs.backport.java.util.concurrent.ScheduledThreadPoolExecutor , it is recommended to use a straight definition of the Executor instance or a factory method definition that points to the JSR-166 backport edu.emory.mathcs.backport.java.util.concurrent.Executors class. To expose such a raw Executor as a Spring org.springframework.core.task.TaskExecutor , simply wrap it with a ConcurrentTaskExecutor adapter.

NOTE: This class implements Spring's org.springframework.core.task.TaskExecutor interface as well as the JSR-166 edu.emory.mathcs.backport.java.util.concurrent.Executor interface, with the former being the primary interface, the other just serving as secondary convenience. For this reason, the exception handling follows the TaskExecutor contract rather than the Executor contract, in particular regarding the org.springframework.core.task.TaskRejectedException .
author:
   Juergen Hoeller
since:
   2.0.3
See Also:   org.springframework.core.task.TaskExecutor
See Also:   edu.emory.mathcs.backport.java.util.concurrent.Executor
See Also:   edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor
See Also:   edu.emory.mathcs.backport.java.util.concurrent.ScheduledThreadPoolExecutor
See Also:   edu.emory.mathcs.backport.java.util.concurrent.Executors
See Also:   ConcurrentTaskExecutor

Field Summary
final protected Log	logger

Method Summary
public void	afterPropertiesSet() Calls `initialize()` after the container applied all property values.
protected BlockingQueue	createQueue(int queueCapacity) Create the BlockingQueue to use for the ThreadPoolExecutor.
public void	destroy() Calls `shutdown` when the BeanFactory destroys the task executor instance.
public void	execute(Runnable task) Implementation of both the JSR-166 backport Executor interface and the Spring TaskExecutor interface, delegating to the ThreadPoolExecutor instance.
public int	getActiveCount() Return the number of currently active threads.
public int	getCorePoolSize() Return the ThreadPoolExecutor's core pool size.
public int	getKeepAliveSeconds() Return the ThreadPoolExecutor's keep-alive seconds.
public int	getMaxPoolSize() Return the ThreadPoolExecutor's maximum pool size.
public int	getPoolSize() Return the current pool size.
public ThreadPoolExecutor	getThreadPoolExecutor() Return the underlying ThreadPoolExecutor for native access.
public void	initialize() Creates the BlockingQueue and the ThreadPoolExecutor.
public boolean	prefersShortLivedTasks() This task executor prefers short-lived work units.
public void	setBeanName(String name)
public void	setCorePoolSize(int corePoolSize) Set the ThreadPoolExecutor's core pool size.
public void	setKeepAliveSeconds(int keepAliveSeconds) Set the ThreadPoolExecutor's keep-alive seconds.
public void	setMaxPoolSize(int maxPoolSize) Set the ThreadPoolExecutor's maximum pool size.
public void	setQueueCapacity(int queueCapacity) Set the capacity for the ThreadPoolExecutor's BlockingQueue.
public void	setRejectedExecutionHandler(RejectedExecutionHandler rejectedExecutionHandler) Set the RejectedExecutionHandler to use for the ThreadPoolExecutor.
public void	setThreadFactory(ThreadFactory threadFactory) Set the ThreadFactory to use for the ThreadPoolExecutor's thread pool.
public void	shutdown() Perform a shutdown on the ThreadPoolExecutor.

Field Detail

logger
final protected Log logger(Code)

Method Detail

afterPropertiesSet
public void afterPropertiesSet()(Code)
	Calls `initialize()` after the container applied all property values. See Also: ThreadPoolTaskExecutor.initialize()

createQueue
protected BlockingQueue createQueue(int queueCapacity)(Code)
	Create the BlockingQueue to use for the ThreadPoolExecutor. A LinkedBlockingQueue instance will be created for a positive capacity value; a SynchronousQueue else. Parameters: queueCapacity - the specified queue capacity the BlockingQueue instance See Also: edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue See Also: edu.emory.mathcs.backport.java.util.concurrent.SynchronousQueue

destroy
public void destroy()(Code)
	Calls `shutdown` when the BeanFactory destroys the task executor instance. See Also: ThreadPoolTaskExecutor.shutdown()

execute
public void execute(Runnable task)(Code)
	Implementation of both the JSR-166 backport Executor interface and the Spring TaskExecutor interface, delegating to the ThreadPoolExecutor instance. See Also: edu.emory.mathcs.backport.java.util.concurrent.Executor.execute(Runnable) See Also: org.springframework.core.task.TaskExecutor.execute(Runnable)

getActiveCount
public int getActiveCount()(Code)
	Return the number of currently active threads. See Also: edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.getActiveCount

getCorePoolSize
public int getCorePoolSize()(Code)
	Return the ThreadPoolExecutor's core pool size.

getKeepAliveSeconds
public int getKeepAliveSeconds()(Code)
	Return the ThreadPoolExecutor's keep-alive seconds.

getMaxPoolSize
public int getMaxPoolSize()(Code)
	Return the ThreadPoolExecutor's maximum pool size.

getPoolSize
public int getPoolSize()(Code)
	Return the current pool size. See Also: edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.getPoolSize

getThreadPoolExecutor
public ThreadPoolExecutor getThreadPoolExecutor() throws IllegalStateException(Code)
	Return the underlying ThreadPoolExecutor for native access. the underlying ThreadPoolExecutor (never `null`) throws: IllegalStateException - if the ThreadPoolTaskExecutor hasn't been initialized yet

initialize
public void initialize()(Code)
	Creates the BlockingQueue and the ThreadPoolExecutor. See Also: ThreadPoolTaskExecutor.createQueue

prefersShortLivedTasks
public boolean prefersShortLivedTasks()(Code)
	This task executor prefers short-lived work units.

setBeanName
public void setBeanName(String name)(Code)

setCorePoolSize
public void setCorePoolSize(int corePoolSize)(Code)
	Set the ThreadPoolExecutor's core pool size. Default is 1. This setting can be modified at runtime, for example through JMX.

setKeepAliveSeconds
public void setKeepAliveSeconds(int keepAliveSeconds)(Code)
	Set the ThreadPoolExecutor's keep-alive seconds. Default is 60. This setting can be modified at runtime, for example through JMX.

setMaxPoolSize
public void setMaxPoolSize(int maxPoolSize)(Code)
	Set the ThreadPoolExecutor's maximum pool size. Default is `Integer.MAX_VALUE`. This setting can be modified at runtime, for example through JMX.

setQueueCapacity
public void setQueueCapacity(int queueCapacity)(Code)
	Set the capacity for the ThreadPoolExecutor's BlockingQueue. Default is `Integer.MAX_VALUE`. Any positive value will lead to a LinkedBlockingQueue instance; any other value will lead to a SynchronousQueue instance. See Also: edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue See Also: edu.emory.mathcs.backport.java.util.concurrent.SynchronousQueue

setRejectedExecutionHandler
public void setRejectedExecutionHandler(RejectedExecutionHandler rejectedExecutionHandler)(Code)
	Set the RejectedExecutionHandler to use for the ThreadPoolExecutor. Default is the ThreadPoolExecutor's default abort policy. See Also: edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.AbortPolicy

setThreadFactory
public void setThreadFactory(ThreadFactory threadFactory)(Code)
	Set the ThreadFactory to use for the ThreadPoolExecutor's thread pool. Default is the ThreadPoolExecutor's default thread factory. See Also: edu.emory.mathcs.backport.java.util.concurrent.Executors.defaultThreadFactory

shutdown
public void shutdown()(Code)
	Perform a shutdown on the ThreadPoolExecutor. See Also: edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.shutdown

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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