org.springframework.aop.target
Class LazyInitTargetSource

java.lang.Object
  

org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
      org.springframework.aop.target.LazyInitTargetSource

All Implemented Interfaces:

Serializable, TargetSource, BeanFactoryAware

public class LazyInitTargetSource
extends AbstractBeanFactoryBasedTargetSource

TargetSource that lazily accesses a singleton from a BeanFactory.

Useful when a proxy reference is needed on initialization but the actual target object should not be initialized until first use. The target bean must me marked as "lazy-init" too, else it would get instantiated by the BeanFactory on startup. For example:

 <bean id="serviceTarget" class="example.MyService" lazy-init="true">
   ...
 </bean>

 <bean id="service" class="org.springframework.aop.framework.ProxyFactoryBean">
   <property name="targetSource">
     <bean class="org.springframework.aop.target.LazyInitTargetSource">
       <property name="targetBeanName"><idref local="serviceTarget"/></property>
     </bean>
   </property>
 </bean>

The "serviceTarget" bean will not get initialized until a method on the "service" proxy gets invoked.

Since:

1.1.4

Author:

Juergen Hoeller

See Also:

Serialized Form

Field Summary

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

logger

Constructor Summary

LazyInitTargetSource()

Method Summary

Object

getTarget() Return a target instance.

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

copyFrom, getBeanFactory, getTargetBeanName, getTargetClass, isStatic, releaseTarget, setBeanFactory, setTargetBeanName, writeReplace

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LazyInitTargetSource

public LazyInitTargetSource()

Method Detail

getTarget

public Object getTarget()
                 throws BeansException

Description copied from interface: TargetSource

Return a target instance. Invoked immediately before the AOP framework calls the "target" of an AOP method invocation.

Returns:

the target object, whicch contains the joinpoint

Throws:

BeansException