AbstractPoolingTargetSource (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.aop.target
Class AbstractPoolingTargetSource

java.lang.Object
  org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
      org.springframework.aop.target.AbstractPrototypeBasedTargetSource
          org.springframework.aop.target.AbstractPoolingTargetSource

All Implemented Interfaces:: Serializable, PoolingConfig, TargetClassAware, TargetSource, BeanFactoryAware, DisposableBean

Direct Known Subclasses:: CommonsPoolTargetSource

public abstract class AbstractPoolingTargetSource
extends AbstractPrototypeBasedTargetSource
implements PoolingConfig, DisposableBean
extends AbstractPrototypeBasedTargetSource
implements PoolingConfig, DisposableBean

Abstract base class for pooling TargetSource implementations which maintain a pool of target instances, acquiring and releasing a target object from the pool for each method invocation. This abstract base class is independent of concrete pooling technology; see the subclass CommonsPoolTargetSource for a concrete example.

Subclasses must implement the getTarget() and releaseTarget(java.lang.Object) methods based on their chosen object pool. The AbstractPrototypeBasedTargetSource.newPrototypeInstance() method inherited from AbstractPrototypeBasedTargetSource can be used to create objects in order to put them into the pool.

Subclasses must also implement some of the monitoring methods from the PoolingConfig interface. The getPoolingConfigMixin() method makes these stats available on proxied objects through an IntroductionAdvisor.

This class implements the DisposableBean interface in order to force subclasses to implement a DisposableBean.destroy() method, closing down their object pool.

Author:: Rod Johnson, Juergen Hoeller
See Also:: getTarget(), releaseTarget(java.lang.Object), DisposableBean.destroy(), Serialized Form

Field Summary

Fields inherited from class org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource

logger

Constructor Summary

AbstractPoolingTargetSource()


Method Summary

protected abstract void createPool()
          Create the pool.

int getMaxSize()
          Return the maximum size of the pool.

DefaultIntroductionAdvisor getPoolingConfigMixin()
          Return an IntroductionAdvisor that providing a mixin exposing statistics about the pool maintained by this object.

abstract Object getTarget()
          Acquire an object from the pool.

abstract void releaseTarget(Object target)
          Return the given object to the pool.

void setBeanFactory(BeanFactory beanFactory)
          Set the owning BeanFactory.

void setMaxSize(int maxSize)
          Set the maximum size of the pool.

Methods inherited from class org.springframework.aop.target.AbstractPrototypeBasedTargetSource

destroyPrototypeInstance, newPrototypeInstance

Methods inherited from class org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource

copyFrom, equals, getBeanFactory, getTargetBeanName, getTargetClass, hashCode, isStatic, setTargetBeanName, setTargetClass, toString, writeReplace

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.springframework.aop.target.PoolingConfig

getActiveCount, getIdleCount

Methods inherited from interface org.springframework.beans.factory.DisposableBean

destroy

Fields inherited from class org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
`logger`

Constructor Summary
`AbstractPoolingTargetSource()`

Method Summary
`protected abstract void`	`createPool()` Create the pool.
`int`	`getMaxSize()` Return the maximum size of the pool.
`DefaultIntroductionAdvisor`	`getPoolingConfigMixin()` Return an IntroductionAdvisor that providing a mixin exposing statistics about the pool maintained by this object.
`abstract Object`	`getTarget()` Acquire an object from the pool.
`abstract void`	`releaseTarget(Object target)` Return the given object to the pool.
`void`	`setBeanFactory(BeanFactory beanFactory)` Set the owning BeanFactory.
`void`	`setMaxSize(int maxSize)` Set the maximum size of the pool.

Methods inherited from class org.springframework.aop.target.AbstractPrototypeBasedTargetSource
`destroyPrototypeInstance, newPrototypeInstance`

Methods inherited from class org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
`copyFrom, equals, getBeanFactory, getTargetBeanName, getTargetClass, hashCode, isStatic, setTargetBeanName, setTargetClass, toString, writeReplace`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Methods inherited from interface org.springframework.aop.target.PoolingConfig
`getActiveCount, getIdleCount`

Methods inherited from interface org.springframework.beans.factory.DisposableBean
`destroy`

Constructor Detail