Class LazyInitTargetSourceCreator

java.lang.Object

org.springframework.aop.framework.autoproxy.target.AbstractBeanFactoryBasedTargetSourceCreator

org.springframework.aop.framework.autoproxy.target.LazyInitTargetSourceCreator

All Implemented Interfaces:

TargetSourceCreator, org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanFactoryAware, org.springframework.beans.factory.DisposableBean

public class LazyInitTargetSourceCreator
extends AbstractBeanFactoryBasedTargetSourceCreator

TargetSourceCreator that enforces a LazyInitTargetSource for each bean that is defined as "lazy-init". This will lead to a proxy created for each of those beans, allowing to fetch a reference to such a bean without actually initializing the target bean instance.

To be registered as custom TargetSourceCreator for an auto-proxy creator, in combination with custom interceptors for specific beans or for the creation of lazy-init proxies only. For example, as an autodetected infrastructure bean in an XML application context definition:

<bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
  <property name="beanNames" value="*" /> <!-- apply to all beans -->
  <property name="customTargetSourceCreators">
    <list>
      <bean class="org.springframework.aop.framework.autoproxy.target.LazyInitTargetSourceCreator" />
    </list>
  </property>
</bean>

<bean id="myLazyInitBean" class="mypackage.MyBeanClass" lazy-init="true">
  <!-- ... -->
</bean>

Since:

1.2

Author:

Juergen Hoeller, Sam Brannen

See Also:

• BeanDefinition.isLazyInit()
• AbstractAutoProxyCreator.setCustomTargetSourceCreators(TargetSourceCreator...)
• BeanNameAutoProxyCreator

Field Summary

Fields inherited from class AbstractBeanFactoryBasedTargetSourceCreator

logger

Constructor Summary

Constructors

Constructor	Description
LazyInitTargetSourceCreator()

Method Summary

Modifier and Type	Method	Description
protected @Nullable AbstractBeanFactoryBasedTargetSource	createBeanFactoryBasedTargetSource(Class<?> beanClass, String beanName)	Subclasses must implement this method to return a new AbstractPrototypeBasedTargetSource if they wish to create a custom TargetSource for this bean, or null if they are not interested it in, in which case no special target source will be created.
protected boolean	isPrototypeBased()	Return whether this TargetSourceCreator is prototype-based.

Methods inherited from class AbstractBeanFactoryBasedTargetSourceCreator

buildInternalBeanFactory, destroy, getBeanFactory, getInternalBeanFactoryForBean, getTargetSource, setBeanFactory

Methods inherited from class Object

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

Constructor Details

LazyInitTargetSourceCreator

public LazyInitTargetSourceCreator()

Method Details

isPrototypeBased

protected boolean isPrototypeBased()

Description copied from class: AbstractBeanFactoryBasedTargetSourceCreator

Return whether this TargetSourceCreator is prototype-based. The scope of the target bean definition will be set accordingly.

Default is "true".

Overrides:

isPrototypeBased in class AbstractBeanFactoryBasedTargetSourceCreator

See Also:

• BeanDefinition.isSingleton()

createBeanFactoryBasedTargetSource

protected @Nullable AbstractBeanFactoryBasedTargetSource createBeanFactoryBasedTargetSource(Class<?> beanClass,
 String beanName)

Description copied from class: AbstractBeanFactoryBasedTargetSourceCreator

Subclasses must implement this method to return a new AbstractPrototypeBasedTargetSource if they wish to create a custom TargetSource for this bean, or null if they are not interested it in, in which case no special target source will be created. Subclasses should not call setTargetBeanName or setBeanFactory on the AbstractPrototypeBasedTargetSource: This class' implementation of getTargetSource() will do that.

Specified by:

createBeanFactoryBasedTargetSource in class AbstractBeanFactoryBasedTargetSourceCreator

Parameters:

beanClass - the class of the bean to create a TargetSource for

beanName - the name of the bean

Returns:

the AbstractPrototypeBasedTargetSource, or null if we don't match this