org.springframework.aop.TargetSource that lazily accesses a
singleton bean from a org.springframework.beans.factory.BeanFactory .
Useful when a proxy reference is needed on initialization but
the actual target object should not be initialized until first use.
When the target bean is defined in an
org. (or a
BeanFactory that is eagerly pre-instantiating singleton beans)
it must be marked as "lazy-init" too, else it will be instantiated by said
ApplicationContext (or 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.
Subclasses can extend this class and override the postProcessTargetObject(Object) to
perform some additional processing with the target object when it is first loaded.
org.springframework.beans.factory.BeanFactory#getBean , postProcessTargetObject
| Modifier and Type | Field and Description |
|---|---|
| private Object |
| Access | Constructor and Description |
|---|---|
| public |
| Modifier and Type | Method and Description |
|---|---|
| public synchronized Object | |
| protected void | postProcessTargetObject(Object
the target object that has just been instantiated (and configured) targetObject)Subclasses may override this method to perform additional processing on the target object when it is first loaded. |
| target | back to summary |
|---|---|
| private Object target
| |
| LazyInitTargetSource | back to summary |
|---|---|
| public LazyInitTargetSource() | |
| getTarget | back to summary |
|---|---|
| public synchronized Object getTarget() throws BeansException Implements org. Doc from org. Return a target instance. Invoked immediately before the AOP framework calls the "target" of an AOP method invocation. | |
| postProcessTargetObject | back to summary |
|---|---|
| protected void postProcessTargetObject(Object targetObject) Subclasses may override this method to perform additional processing on the target object when it is first loaded.
| |