Spring Context 6.1.4 · org.springframework.scheduling.concurrent.ForkJoinPoolFactoryBean

Modifier and Type	Field and Description
private boolean	asyncMode
private int	awaitTerminationSeconds
private boolean	commonPool
private ForkJoinPool	forkJoinPool
private int	parallelism
private ForkJoinPool.ForkJoinWorkerThreadFactory	threadFactory
private Thread.UncaughtExceptionHandler	uncaughtExceptionHandler

Access	Constructor and Description
public	ForkJoinPoolFactoryBean()

Method Summary

Modifier and Type	Method and Description
public void	afterPropertiesSet() Implements org.springframework.beans.factory.InitializingBean.afterPropertiesSet. Invoked by the containing `BeanFactory` after it has set all bean properties and satisfied `BeanFactoryAware`, `ApplicationContextAware` etc. This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.
public void	destroy() Implements org.springframework.beans.factory.DisposableBean.destroy. Invoked by the containing `BeanFactory` on destruction of a bean.
public ForkJoinPool	getObject() Implements org.springframework.beans.factory.FactoryBean.getObject. Return an instance (possibly shared or independent) of the object managed by this factory.
public Class<?>	getObjectType() Implements org.springframework.beans.factory.FactoryBean.getObjectType. Return the type of object that this FactoryBean creates, or `null` if not known in advance.
public boolean	isSingleton() Overrides default org.springframework.beans.factory.FactoryBean.isSingleton. Is the object managed by this factory a singleton?
public void	setAsyncMode(boolean asyncMode) Specify whether to establish a local first-in-first-out scheduling mode for forked tasks that are never joined.
public void	setAwaitTerminationSeconds(int awaitTerminationSeconds) Set the maximum number of seconds that this ForkJoinPool 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.
public void	setCommonPool(boolean commonPool) Set whether to expose JDK 8's 'common' `ForkJoinPool`.
public void	setParallelism(int parallelism) Specify the parallelism level.
public void	setThreadFactory(ForkJoinPool.ForkJoinWorkerThreadFactory threadFactory) Set the factory for creating new ForkJoinWorkerThreads.
public void	setUncaughtExceptionHandler(Thread.UncaughtExceptionHandler uncaughtExceptionHandler) Set the handler for internal worker threads that terminate due to unrecoverable errors encountered while executing tasks.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

asyncMode	back to summary
private boolean asyncMode

awaitTerminationSeconds	back to summary
private int awaitTerminationSeconds

commonPool	back to summary
private boolean commonPool

forkJoinPool	back to summary
private ForkJoinPool forkJoinPool Annotations @Nullable

parallelism	back to summary
private int parallelism

threadFactory	back to summary
private ForkJoinPool.ForkJoinWorkerThreadFactory threadFactory

uncaughtExceptionHandler	back to summary
private Thread.UncaughtExceptionHandler uncaughtExceptionHandler Annotations @Nullable

ForkJoinPoolFactoryBean	back to summary
public ForkJoinPoolFactoryBean()

Method Detail

afterPropertiesSet back to summary

afterPropertiesSet	back to summary
public void afterPropertiesSet() Implements org.springframework.beans.factory.InitializingBean.afterPropertiesSet. Doc from org.springframework.beans.factory.InitializingBean.afterPropertiesSet. Invoked by the containing `BeanFactory` after it has set all bean properties and satisfied `BeanFactoryAware`, `ApplicationContextAware` etc. This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set. Annotations @Override

public void afterPropertiesSet()

Implements org.springframework.beans.factory.InitializingBean.afterPropertiesSet.

Doc from org.springframework.beans.factory.InitializingBean.afterPropertiesSet.

Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.

This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

Annotations

@Override

destroy back to summary

destroy	back to summary
public void destroy() Implements org.springframework.beans.factory.DisposableBean.destroy. Doc from org.springframework.beans.factory.DisposableBean.destroy. Invoked by the containing `BeanFactory` on destruction of a bean. Annotations @Override

public void destroy()

Implements org.springframework.beans.factory.DisposableBean.destroy.

Doc from org.springframework.beans.factory.DisposableBean.destroy.

Invoked by the containing BeanFactory on destruction of a bean.

Annotations

@Override

getObject back to summary

getObject	back to summary
public ForkJoinPool getObject() Implements org.springframework.beans.factory.FactoryBean.getObject. Doc from org.springframework.beans.factory.FactoryBean.getObject. Return an instance (possibly shared or independent) of the object managed by this factory. As with a `BeanFactory`, this allows support for both the Singleton and Prototype design pattern. If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding `FactoryBeanNotInitializedException`. As of Spring 2.0, FactoryBeans are allowed to return `null` objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate. Returns:ForkJoinPool an instance of the bean (can be `null`) Annotations @Override @Nullable

public ForkJoinPool getObject()

Implements org.springframework.beans.factory.FactoryBean.getObject.

Doc from org.springframework.beans.factory.FactoryBean.getObject.

Return an instance (possibly shared or independent) of the object managed by this factory.

As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding FactoryBeanNotInitializedException.

As of Spring 2.0, FactoryBeans are allowed to return null objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.

Returns:ForkJoinPool

an instance of the bean (can be null)

Annotations

@Override
@Nullable

getObjectType back to summary

getObjectType	back to summary
public Class<?> getObjectType() Implements org.springframework.beans.factory.FactoryBean.getObjectType. Doc from org.springframework.beans.factory.FactoryBean.getObjectType. Return the type of object that this FactoryBean creates, or `null` if not known in advance. This allows one to check for specific types of beans without instantiating objects, for example on autowiring. In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too. This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available. Note Autowiring will simply ignore FactoryBeans that return `null` here. Therefore, it is highly recommended to implement this method properly, using the current state of the FactoryBean. Returns:Class<?> the type of object that this FactoryBean creates, or `null` if not known at the time of the call Annotations @Override

public Class<?> getObjectType()

Implements org.springframework.beans.factory.FactoryBean.getObjectType.

Doc from org.springframework.beans.factory.FactoryBean.getObjectType.

Return the type of object that this FactoryBean creates, or null if not known in advance.

This allows one to check for specific types of beans without instantiating objects, for example on autowiring.

In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

Note

Autowiring will simply ignore FactoryBeans that return null here. Therefore, it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Returns:Class<?>

the type of object that this FactoryBean creates, or null if not known at the time of the call

Annotations

@Override

isSingleton back to summary

isSingleton	back to summary
public boolean isSingleton() Overrides default org.springframework.beans.factory.FactoryBean.isSingleton. Doc from org.springframework.beans.factory.FactoryBean.isSingleton. Is the object managed by this factory a singleton? That is, will `getObject()` always return the same object (a reference that can be cached)? Note If a FactoryBean indicates to hold a singleton object, the object returned from `getObject()` might get cached by the owning BeanFactory. Hence, do not return `true` unless the FactoryBean always exposes the same reference. The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there. Note This method returning `false` does not necessarily indicate that returned objects are independent instances. An implementation of the extended `SmartFactoryBean` interface may explicitly indicate independent instances through its `SmartFactoryBean#isPrototype()` method. Plain `FactoryBean` implementations which do not implement this extended interface are simply assumed to always return independent instances if the `isSingleton()` implementation returns `false`. The default implementation returns `true`, since a `FactoryBean` typically manages a singleton instance. Returns:boolean whether the exposed object is a singleton Annotations @Override

public boolean isSingleton()

Overrides default org.springframework.beans.factory.FactoryBean.isSingleton.

Doc from org.springframework.beans.factory.FactoryBean.isSingleton.

Is the object managed by this factory a singleton? That is, will getObject() always return the same object (a reference that can be cached)?

Note

If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

Note

This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean#isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

The default implementation returns true, since a FactoryBean typically manages a singleton instance.

Returns:boolean

whether the exposed object is a singleton

Annotations

@Override

setAsyncMode	back to summary
public void setAsyncMode(boolean asyncMode) Specify whether to establish a local first-in-first-out scheduling mode for forked tasks that are never joined. This mode (asyncMode = `true`) may be more appropriate than the default locally stack-based mode in applications in which worker threads only process event-style asynchronous tasks. Default is `false`.

setAwaitTerminationSeconds back to summary

setAwaitTerminationSeconds	back to summary
public void setAwaitTerminationSeconds(int awaitTerminationSeconds) Set the maximum number of seconds that this ForkJoinPool 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 ForkJoinPool won't wait for the termination of tasks at all. 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 contrast, if you specify an await-termination period using this property, this executor will wait for the given time (max) for the termination of tasks. Note that this feature works for the `"commonPool"` mode as well. The underlying ForkJoinPool won't actually terminate in that case but will wait for all tasks to terminate. See Also `java.util.concurrent.ForkJoinPool#shutdown()`, `java.util.concurrent.ForkJoinPool#awaitTermination`

public void setAwaitTerminationSeconds(int awaitTerminationSeconds)

Set the maximum number of seconds that this ForkJoinPool 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 ForkJoinPool won't wait for the termination of tasks at all. 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 contrast, if you specify an await-termination period using this property, this executor will wait for the given time (max) for the termination of tasks.

Note that this feature works for the "commonPool" mode as well. The underlying ForkJoinPool won't actually terminate in that case but will wait for all tasks to terminate.

See Also: java.util.concurrent.ForkJoinPool#shutdown(), java.util.concurrent.ForkJoinPool#awaitTermination

setCommonPool back to summary

setCommonPool	back to summary
public void setCommonPool(boolean commonPool) Set whether to expose JDK 8's 'common' `ForkJoinPool`. Default is "false", creating a local `ForkJoinPool` instance based on the `"parallelism"`, `"threadFactory"`, `"uncaughtExceptionHandler"` and `"asyncMode"` properties on this FactoryBean. Note Setting this flag to "true" effectively ignores all other properties on this FactoryBean, reusing the shared common JDK `ForkJoinPool` instead. This is a fine choice on JDK 8 but does remove the application's ability to customize ForkJoinPool behavior, in particular the use of custom threads. Since 3.2 See Also `java.util.concurrent.ForkJoinPool#commonPool()`

public void setCommonPool(boolean commonPool)

Set whether to expose JDK 8's 'common' ForkJoinPool.

Default is "false", creating a local ForkJoinPool instance based on the "parallelism", "threadFactory", "uncaughtExceptionHandler" and "asyncMode" properties on this FactoryBean.

Note

Setting this flag to "true" effectively ignores all other properties on this FactoryBean, reusing the shared common JDK ForkJoinPool instead. This is a fine choice on JDK 8 but does remove the application's ability to customize ForkJoinPool behavior, in particular the use of custom threads.

Since: 3.2
See Also: java.util.concurrent.ForkJoinPool#commonPool()

setParallelism	back to summary
public void setParallelism(int parallelism) Specify the parallelism level. Default is `Runtime#availableProcessors()`.

setThreadFactory	back to summary
public void setThreadFactory(ForkJoinPool.ForkJoinWorkerThreadFactory threadFactory) Set the factory for creating new ForkJoinWorkerThreads. Default is `ForkJoinPool#defaultForkJoinWorkerThreadFactory`.

setUncaughtExceptionHandler	back to summary
public void setUncaughtExceptionHandler(Thread.UncaughtExceptionHandler uncaughtExceptionHandler) Set the handler for internal worker threads that terminate due to unrecoverable errors encountered while executing tasks. Default is none.

public Class ForkJoinPoolFactoryBean

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Field Detail

Constructor Detail

Method Detail