Package org.springframework.aop.target

Class AbstractPrototypeBasedTargetSource

java.lang.Object

org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource

org.springframework.aop.target.AbstractPrototypeBasedTargetSource

All Implemented Interfaces:

Serializable, TargetClassAware, TargetSource, Aware, BeanFactoryAware

Direct Known Subclasses:

AbstractPoolingTargetSource, PrototypeTargetSource, ThreadLocalTargetSource

public abstract class AbstractPrototypeBasedTargetSource
extends AbstractBeanFactoryBasedTargetSource

Base class for dynamic TargetSource implementations that create new prototype bean instances to support a pooling or new-instance-per-invocation strategy.

Such TargetSources must run in a BeanFactory, as it needs to call the getBean method to create a new prototype instance. Therefore, this base class extends AbstractBeanFactoryBasedTargetSource.

Author:

Rod Johnson, Juergen Hoeller

See Also:

• BeanFactory.getBean(java.lang.String)
• PrototypeTargetSource
• ThreadLocalTargetSource
• CommonsPool2TargetSource
• Serialized Form

Field Summary

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

logger

Constructor Summary

Constructors

Constructor	Description
AbstractPrototypeBasedTargetSource()

Method Summary

Modifier and Type	Method	Description
protected void	destroyPrototypeInstance(Object target)	Subclasses should call this method to destroy an obsolete prototype instance.
protected Object	newPrototypeInstance()	Subclasses should call this method to create a new prototype instance.
void	setBeanFactory(BeanFactory beanFactory)	Set the owning BeanFactory.
protected Object	writeReplace()	Replaces this object with a SingletonTargetSource on serialization.

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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.aop.TargetSource

getTarget, isStatic, releaseTarget

Constructor Details

AbstractPrototypeBasedTargetSource

public AbstractPrototypeBasedTargetSource()

Method Details

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)
                    throws BeansException

Description copied from class: AbstractBeanFactoryBasedTargetSource

Set the owning BeanFactory. We need to save a reference so that we can use the getBean method on every invocation.

Specified by:

setBeanFactory in interface BeanFactoryAware

Overrides:

setBeanFactory in class AbstractBeanFactoryBasedTargetSource

Parameters:

beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

Throws:

BeansException - in case of initialization errors

See Also:

• BeanInitializationException

newPrototypeInstance

protected Object newPrototypeInstance()
                               throws BeansException

Subclasses should call this method to create a new prototype instance.

Throws:

BeansException - if bean creation failed

destroyPrototypeInstance

protected void destroyPrototypeInstance(Object target)

Subclasses should call this method to destroy an obsolete prototype instance.

Parameters:

target - the bean instance to destroy

writeReplace

protected Object writeReplace()
                       throws ObjectStreamException

Replaces this object with a SingletonTargetSource on serialization. Protected as otherwise it won't be invoked for subclasses. (The writeReplace() method must be visible to the class being serialized.)

With this implementation of this method, there is no need to mark non-serializable fields in this class or subclasses as transient.

Throws:

ObjectStreamException