org.springframework.aop.target: abstract public class: AbstractPoolingTargetSource

org.springframework.aop.target
abstract public class: AbstractPoolingTargetSource [javadoc | source]

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

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

Direct Known Subclasses:
CommonsPoolTargetSource

Abstract base class for pooling org.springframework.aop.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 methods based on their chosen object pool. The #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 org.springframework.beans.factory.DisposableBean interface in order to force subclasses to implement a #destroy() method, closing down their object pool.

Also see:

getTarget

releaseTarget

destroy

author: Rod - Johnson

author: Juergen - Hoeller

Fields inherited from org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource:
logger

Method from org.springframework.aop.target.AbstractPoolingTargetSource Summary:
createPool, getMaxSize, getPoolingConfigMixin, getTarget, releaseTarget, setBeanFactory, setMaxSize

Methods from org.springframework.aop.target.AbstractPrototypeBasedTargetSource:
destroyPrototypeInstance, newPrototypeInstance, setBeanFactory

Methods from org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource:
copyFrom, equals, getBeanFactory, getTargetBeanName, getTargetClass, hashCode, isStatic, releaseTarget, setBeanFactory, setTargetBeanName, setTargetClass, toString, writeReplace

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.springframework.aop.target.AbstractPoolingTargetSource Detail:
abstract protected void createPool() throws Exception Create the pool.
public int getMaxSize() { return this.maxSize; } Return the maximum size of the pool.
public DefaultIntroductionAdvisor getPoolingConfigMixin() { DelegatingIntroductionInterceptor dii = new DelegatingIntroductionInterceptor(this); return new DefaultIntroductionAdvisor(dii, PoolingConfig.class); } Return an IntroductionAdvisor that providing a mixin exposing statistics about the pool maintained by this object.
abstract public Object getTarget() throws Exception Acquire an object from the pool.
abstract public void releaseTarget(Object target) throws Exception Return the given object to the pool.
public final void setBeanFactory(BeanFactory beanFactory) throws BeansException { super.setBeanFactory(beanFactory); try { createPool(); } catch (Throwable ex) { throw new BeanInitializationException("Could not create instance pool for TargetSource", ex); } }
public void setMaxSize(int maxSize) { this.maxSize = maxSize; } Set the maximum size of the pool. Default is -1, indicating no size limit.