类 ScopedProxyFactoryBean
- java.lang.Object
- org.springframework.aop.framework.ProxyConfig
- org.springframework.aop.scope.ScopedProxyFactoryBean
- 所有已实现的接口:
Serializable
,AopInfrastructureBean
,Aware
,BeanFactoryAware
,FactoryBean<Object>
public class ScopedProxyFactoryBean extends ProxyConfig implements FactoryBean<Object>, BeanFactoryAware, AopInfrastructureBean
Convenient proxy factory bean for scoped objects.Proxies created using this factory bean are thread-safe singletons and may be injected into shared objects, with transparent scoping behavior.
Proxies returned by this class implement the
ScopedObject
interface. This presently allows for removing the corresponding object from the scope, seamlessly creating a new instance in the scope on next access.Please note that the proxies created by this factory are class-based proxies by default. This can be customized through switching the "proxyTargetClass" property to "false".
- 从以下版本开始:
- 2.0
- 作者:
- Rod Johnson, Juergen Hoeller
- 另请参阅:
ProxyConfig.setProxyTargetClass(boolean)
, 序列化表格
构造器概要
构造器 构造器 说明 ScopedProxyFactoryBean()
Create a new ScopedProxyFactoryBean instance.
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 Object
getObject()
Return an instance (possibly shared or independent) of the object managed by this factory.Class<?>
getObjectType()
Return the type of object that this FactoryBean creates, ornull
if not known in advance.boolean
isSingleton()
Is the object managed by this factory a singleton?void
setBeanFactory(BeanFactory beanFactory)
Callback that supplies the owning factory to a bean instance.void
setTargetBeanName(String targetBeanName)
Set the name of the bean that is to be scoped.从类继承的方法 org.springframework.aop.framework.ProxyConfig
copyFrom, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setExposeProxy, setFrozen, setOpaque, setOptimize, setProxyTargetClass, toString
构造器详细资料
ScopedProxyFactoryBean
public ScopedProxyFactoryBean()
Create a new ScopedProxyFactoryBean instance.
方法详细资料
setTargetBeanName
public void setTargetBeanName(String targetBeanName)
Set the name of the bean that is to be scoped.
setBeanFactory
public void setBeanFactory(BeanFactory beanFactory)
从接口复制的说明:BeanFactoryAware
Callback that supplies the owning factory to a bean instance.Invoked after the population of normal bean properties but before an initialization callback such as
InitializingBean.afterPropertiesSet()
or a custom init-method.- 指定者:
setBeanFactory
在接口中BeanFactoryAware
- 参数:
beanFactory
- owning BeanFactory (nevernull
). The bean can immediately call methods on the factory.- 另请参阅:
BeanInitializationException
getObject
public Object getObject()
从接口复制的说明:FactoryBean
Return an instance (possibly shared or independent) of the object managed by this factory.As with a
BeanFactory
, this allows support for both the Singleton and Prototype design pattern.If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding
FactoryBeanNotInitializedException
.As of Spring 2.0, FactoryBeans are allowed to return
null
objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.- 指定者:
getObject
在接口中FactoryBean<Object>
- 返回:
- an instance of the bean (can be
null
) - 另请参阅:
FactoryBeanNotInitializedException
getObjectType
public Class<?> getObjectType()
从接口复制的说明:FactoryBean
Return the type of object that this FactoryBean creates, ornull
if not known in advance.This allows one to check for specific types of beans without instantiating objects, for example on autowiring.
In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.
This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.
NOTE: Autowiring will simply ignore FactoryBeans that return
null
here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.- 指定者:
getObjectType
在接口中FactoryBean<Object>
- 返回:
- the type of object that this FactoryBean creates, or
null
if not known at the time of the call - 另请参阅:
ListableBeanFactory.getBeansOfType(java.lang.Class<T>)
isSingleton
public boolean isSingleton()
从接口复制的说明:FactoryBean
Is the object managed by this factory a singleton? That is, willFactoryBean.getObject()
always return the same object (a reference that can be cached)?NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from
getObject()
might get cached by the owning BeanFactory. Hence, do not returntrue
unless the FactoryBean always exposes the same reference.The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.
NOTE: This method returning
false
does not necessarily indicate that returned objects are independent instances. An implementation of the extendedSmartFactoryBean
interface may explicitly indicate independent instances through itsSmartFactoryBean.isPrototype()
method. PlainFactoryBean
implementations which do not implement this extended interface are simply assumed to always return independent instances if theisSingleton()
implementation returnsfalse
.- 指定者:
isSingleton
在接口中FactoryBean<Object>
- 返回:
- whether the exposed object is a singleton
- 另请参阅:
FactoryBean.getObject()
,SmartFactoryBean.isPrototype()