java.lang.Object | ||||
↳ | org.springframework.util.CustomizableThreadCreator | |||
↳ | org.springframework.scheduling.concurrent.CustomizableThreadFactory | |||
↳ | org.springframework.scheduling.concurrent.ExecutorConfigurationSupport | |||
↳ | org.springframework.scheduling.concurrent.ThreadPoolExecutorFactoryBean |
JavaBean that allows for configuring a JDK 1.5 java.util.concurrent.ThreadPoolExecutor in bean style (through its "corePoolSize", "maxPoolSize", "keepAliveSeconds", "queueCapacity" properties) and exposing it as a bean reference of its native java.util.concurrent.ExecutorService type.
For an alternative, you may set up a ThreadPoolExecutor instance directly using constructor injection, or use a factory method definition that points to the JDK 1.5 java.util.concurrent.Executors class.
If you need a timing-based ScheduledExecutorService
instead, consider ScheduledExecutorFactoryBean
.
ExecutorService
ThreadPoolExecutor
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Inherited Fields | |||||||||||
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From class
org.springframework.scheduling.concurrent.ExecutorConfigurationSupport
|
Public Constructors | |||||||||||
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Public Methods | |||||||||||
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Return an instance (possibly shared or independent) of the object
managed by this factory.
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Return the type of object that this FactoryBean creates,
or
null if not known in advance. | |||||||||||
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 | |||||||||||
Specify whether to allow core threads to time out.
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Set the ThreadPoolExecutor's core pool size.
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Specify whether this FactoryBean should expose an unconfigurable
decorator for the created executor.
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Set the ThreadPoolExecutor's keep-alive seconds.
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Set the ThreadPoolExecutor's maximum pool size.
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Set the capacity for the ThreadPoolExecutor's BlockingQueue.
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Protected Methods | |||||||||||
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Create the BlockingQueue to use for the ThreadPoolExecutor.
| |||||||||||
Create the target
ExecutorService instance. |
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Inherited Methods | |||||||||||
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From class
org.springframework.scheduling.concurrent.ExecutorConfigurationSupport
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From class
org.springframework.scheduling.concurrent.CustomizableThreadFactory
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From class
org.springframework.util.CustomizableThreadCreator
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From class
java.lang.Object
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From interface
java.util.concurrent.ThreadFactory
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From interface
org.springframework.beans.factory.BeanNameAware
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From interface
org.springframework.beans.factory.DisposableBean
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From interface
org.springframework.beans.factory.FactoryBean
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From interface
org.springframework.beans.factory.InitializingBean
|
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.
null
)Exception |
---|
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.
null
if not known at the time of the callIs 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
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
.
Specify whether to allow core threads to time out. This enables dynamic growing and shrinking even in combination with a non-zero queue (since the max pool size will only grow once the queue is full).
Default is "false". Note that this feature is only available on Java 6 or above. On Java 5, consider switching to the backport-concurrent version of ThreadPoolTaskExecutor which also supports this feature.
Set the ThreadPoolExecutor's core pool size. Default is 1.
This setting can be modified at runtime, for example through JMX.
Specify whether this FactoryBean should expose an unconfigurable decorator for the created executor.
Default is "false", exposing the raw executor as bean reference. Switch this flag to "true" to strictly prevent clients from modifying the executor's configuration.
Set the ThreadPoolExecutor's keep-alive seconds. Default is 60.
This setting can be modified at runtime, for example through JMX.
Set the ThreadPoolExecutor's maximum pool size.
Default is Integer.MAX_VALUE
.
This setting can be modified at runtime, for example through JMX.
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.
Create the BlockingQueue to use for the ThreadPoolExecutor.
A LinkedBlockingQueue instance will be created for a positive capacity value; a SynchronousQueue else.
queueCapacity | the specified queue capacity |
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Create the target ExecutorService
instance.
Called by afterPropertiesSet
.
threadFactory | the ThreadFactory to use |
---|---|
rejectedExecutionHandler | the RejectedExecutionHandler to use |