类 LazyInitTargetSource
- java.lang.Object
- org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
- org.springframework.aop.target.LazyInitTargetSource
- 所有已实现的接口:
Serializable,TargetClassAware,TargetSource,Aware,BeanFactoryAware
public class LazyInitTargetSource extends AbstractBeanFactoryBasedTargetSource
TargetSourcethat lazily accesses a singleton bean from aBeanFactory.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
ApplicationContext(or aBeanFactorythat is eagerly pre-instantiating singleton beans) it must be marked as "lazy-init" too, else it will be instantiated by saidApplicationContext(orBeanFactory) 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.- 从以下版本开始:
- 1.1.4
- 作者:
- Juergen Hoeller, Rob Harrop
- 另请参阅:
BeanFactory.getBean(java.lang.String),postProcessTargetObject(java.lang.Object), 序列化表格
字段概要
从类继承的字段 org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
logger
构造器概要
构造器 构造器 说明 LazyInitTargetSource()
方法概要
所有方法 实例方法 具体方法 修饰符和类型 方法 说明 ObjectgetTarget()Return a target instance.protected voidpostProcessTargetObject(Object targetObject)Subclasses may override this method to perform additional processing on the target object when it is first loaded.从类继承的方法 org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
copyFrom, equals, getBeanFactory, getTargetBeanName, getTargetClass, hashCode, isStatic, releaseTarget, setBeanFactory, setTargetBeanName, setTargetClass, toString
构造器详细资料
LazyInitTargetSource
public LazyInitTargetSource()
方法详细资料
getTarget
@Nullable public Object getTarget() throws BeansException
从接口复制的说明:TargetSourceReturn a target instance. Invoked immediately before the AOP framework calls the "target" of an AOP method invocation.- 返回:
- the target object which contains the joinpoint, or
nullif there is no actual target instance - 抛出:
BeansException
postProcessTargetObject
protected void postProcessTargetObject(Object targetObject)
Subclasses may override this method to perform additional processing on the target object when it is first loaded.- 参数:
targetObject- the target object that has just been instantiated (and configured)