org.springframework.scheduling.concurrent

Class ExecutorConfigurationSupport

java.lang.Object

org.springframework.util.CustomizableThreadCreator

org.springframework.scheduling.concurrent.CustomizableThreadFactory

org.springframework.scheduling.concurrent.ExecutorConfigurationSupport

All Implemented Interfaces:

java.io.Serializable, java.util.concurrent.ThreadFactory, Aware, BeanNameAware, DisposableBean, InitializingBean

Direct Known Subclasses:

ScheduledExecutorFactoryBean, ThreadPoolExecutorFactoryBean, ThreadPoolTaskExecutor, ThreadPoolTaskScheduler

public abstract class ExecutorConfigurationSupport
extends CustomizableThreadFactory
implements BeanNameAware, InitializingBean, DisposableBean

Base class for classes that are setting up a java.util.concurrent.ExecutorService (typically a ThreadPoolExecutor). Defines common configuration settings and common lifecycle handling.

Since:

3.0

Author:

Juergen Hoeller

See Also:

ExecutorService, Executors, ThreadPoolExecutor, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private int	awaitTerminationSeconds
private java.lang.String	beanName
private java.util.concurrent.ExecutorService	executor
protected Log	logger
private java.util.concurrent.RejectedExecutionHandler	rejectedExecutionHandler
private java.util.concurrent.ThreadFactory	threadFactory
private boolean	threadNamePrefixSet
private boolean	waitForTasksToCompleteOnShutdown

Constructor Summary

Constructors

Constructor and Description
ExecutorConfigurationSupport()

Method Summary

Methods

Modifier and Type	Method and Description
void	afterPropertiesSet() Calls initialize() after the container applied all property values.
private void	awaitTerminationIfNecessary() Wait for the executor to terminate, according to the value of the "awaitTerminationSeconds" property.
void	destroy() Calls shutdown when the BeanFactory destroys the task executor instance.
void	initialize() Set up the ExecutorService.
protected abstract java.util.concurrent.ExecutorService	initializeExecutor(java.util.concurrent.ThreadFactory threadFactory, java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler) Create the target ExecutorService instance.
void	setAwaitTerminationSeconds(int awaitTerminationSeconds) Set the maximum number of seconds that this executor is supposed to block on shutdown in order to wait for remaining tasks to complete their execution before the rest of the container continues to shut down.
void	setBeanName(java.lang.String name) Set the name of the bean in the bean factory that created this bean.
void	setRejectedExecutionHandler(java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler) Set the RejectedExecutionHandler to use for the ThreadPoolExecutor.
void	setThreadFactory(java.util.concurrent.ThreadFactory threadFactory) Set the ThreadFactory to use for the ThreadPoolExecutor's thread pool.
void	setThreadNamePrefix(java.lang.String threadNamePrefix) Specify the prefix to use for the names of newly created threads.
void	setWaitForTasksToCompleteOnShutdown(boolean waitForJobsToCompleteOnShutdown) Set whether to wait for scheduled tasks to complete on shutdown, not interrupting running tasks and executing all tasks in the queue.
void	shutdown() Perform a shutdown on the ThreadPoolExecutor.

Methods inherited from class org.springframework.scheduling.concurrent.CustomizableThreadFactory

newThread

Methods inherited from class org.springframework.util.CustomizableThreadCreator

createThread, getDefaultThreadNamePrefix, getThreadGroup, getThreadNamePrefix, getThreadPriority, isDaemon, nextThreadName, setDaemon, setThreadGroup, setThreadGroupName, setThreadPriority

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Log logger

threadFactory

private java.util.concurrent.ThreadFactory threadFactory

threadNamePrefixSet

private boolean threadNamePrefixSet

rejectedExecutionHandler

private java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler

waitForTasksToCompleteOnShutdown

private boolean waitForTasksToCompleteOnShutdown

awaitTerminationSeconds

private int awaitTerminationSeconds

beanName

private java.lang.String beanName

executor

private java.util.concurrent.ExecutorService executor

Constructor Detail

ExecutorConfigurationSupport

public ExecutorConfigurationSupport()

Method Detail

setThreadFactory

public void setThreadFactory(java.util.concurrent.ThreadFactory threadFactory)

Set the ThreadFactory to use for the ThreadPoolExecutor's thread pool. Default is the ThreadPoolExecutor's default thread factory.

See Also:

Executors.defaultThreadFactory()

setThreadNamePrefix

public void setThreadNamePrefix(java.lang.String threadNamePrefix)

Description copied from class: CustomizableThreadCreator

Specify the prefix to use for the names of newly created threads. Default is "SimpleAsyncTaskExecutor-".

Overrides:

setThreadNamePrefix in class CustomizableThreadCreator

setRejectedExecutionHandler

public void setRejectedExecutionHandler(java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler)

Set the RejectedExecutionHandler to use for the ThreadPoolExecutor. Default is the ThreadPoolExecutor's default abort policy.

See Also:

ThreadPoolExecutor.AbortPolicy

setWaitForTasksToCompleteOnShutdown

public void setWaitForTasksToCompleteOnShutdown(boolean waitForJobsToCompleteOnShutdown)

Set whether to wait for scheduled tasks to complete on shutdown, not interrupting running tasks and executing all tasks in the queue.

Default is "false", shutting down immediately through interrupting ongoing tasks and clearing the queue. Switch this flag to "true" if you prefer fully completed tasks at the expense of a longer shutdown phase.

Note that Spring's container shutdown continues while ongoing tasks are being completed. If you want this executor to block and wait for the termination of tasks before the rest of the container continues to shut down - e.g. in order to keep up other resources that your tasks may need -, set the "awaitTerminationSeconds" property instead of or in addition to this property.

See Also:

ExecutorService.shutdown(), ExecutorService.shutdownNow()

setAwaitTerminationSeconds

public void setAwaitTerminationSeconds(int awaitTerminationSeconds)

Set the maximum number of seconds that this executor is supposed to block on shutdown in order to wait for remaining tasks to complete their execution before the rest of the container continues to shut down. This is particularly useful if your remaining tasks are likely to need access to other resources that are also managed by the container.

By default, this executor won't wait for the termination of tasks at all. It will either shut down immediately, interrupting ongoing tasks and clearing the remaining task queue - or, if the "waitForTasksToCompleteOnShutdown" flag has been set to true, it will continue to fully execute all ongoing tasks as well as all remaining tasks in the queue, in parallel to the rest of the container shutting down.

In either case, if you specify an await-termination period using this property, this executor will wait for the given time (max) for the termination of tasks. As a rule of thumb, specify a significantly higher timeout here if you set "waitForTasksToCompleteOnShutdown" to true at the same time, since all remaining tasks in the queue will still get executed - in contrast to the default shutdown behavior where it's just about waiting for currently executing tasks that aren't reacting to thread interruption.

See Also:

ExecutorService.shutdown(), ExecutorService.awaitTermination(long, java.util.concurrent.TimeUnit)

setBeanName

public void setBeanName(java.lang.String name)

Description copied from interface: BeanNameAware

Set the name of the bean in the bean factory that created this bean.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method.

Specified by:

setBeanName in interface BeanNameAware

Parameters:

name - the name of the bean in the factory. Note that this name is the actual bean name used in the factory, which may differ from the originally specified name: in particular for inner bean names, the actual bean name might have been made unique through appending "#..." suffixes. Use the BeanFactoryUtils.originalBeanName(String) method to extract the original bean name (without suffix), if desired.

afterPropertiesSet

public void afterPropertiesSet()

Calls initialize() after the container applied all property values.

Specified by:

afterPropertiesSet in interface InitializingBean

See Also:

initialize()

initialize

public void initialize()

Set up the ExecutorService.

initializeExecutor

protected abstract java.util.concurrent.ExecutorService initializeExecutor(java.util.concurrent.ThreadFactory threadFactory,
                                                      java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler)

Create the target ExecutorService instance. Called by afterPropertiesSet.

Parameters:

threadFactory - the ThreadFactory to use

rejectedExecutionHandler - the RejectedExecutionHandler to use

Returns:

a new ExecutorService instance

See Also:

afterPropertiesSet()

destroy

public void destroy()

Calls shutdown when the BeanFactory destroys the task executor instance.

Specified by:

destroy in interface DisposableBean

See Also:

shutdown()

shutdown

public void shutdown()

Perform a shutdown on the ThreadPoolExecutor.

See Also:

ExecutorService.shutdown(), ExecutorService.shutdownNow(), awaitTerminationIfNecessary()

awaitTerminationIfNecessary

private void awaitTerminationIfNecessary()

Wait for the executor to terminate, according to the value of the "awaitTerminationSeconds" property.