public abstract class AbstractSingletonProxyFactoryBean extends ProxyConfig implements FactoryBean<Object>, BeanClassLoaderAware, InitializingBean
FactoryBean types that produce singleton-scoped
proxy objects.
Manages pre- and post-interceptors (references, rather than
interceptor names, as in ProxyFactoryBean) and provides
consistent interface management.
OBJECT_TYPE_ATTRIBUTE| Constructor and Description |
|---|
AbstractSingletonProxyFactoryBean() |
| Modifier and Type | Method and Description |
|---|---|
void |
afterPropertiesSet()
Invoked by the containing
BeanFactory after it has set all bean properties
and satisfied BeanFactoryAware, ApplicationContextAware etc. |
protected abstract Object |
createMainInterceptor()
Create the "main" interceptor for this proxy factory bean.
|
protected TargetSource |
createTargetSource(Object target)
Determine a TargetSource for the given target (or TargetSource).
|
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,
or
null if not known in advance. |
boolean |
isSingleton()
Is the object managed by this factory a singleton? That is,
will
FactoryBean.getObject() always return the same object
(a reference that can be cached)? |
protected void |
postProcessProxyFactory(ProxyFactory proxyFactory)
A hook for subclasses to post-process the
ProxyFactory
before creating the proxy instance with it. |
void |
setAdvisorAdapterRegistry(AdvisorAdapterRegistry advisorAdapterRegistry)
Specify the AdvisorAdapterRegistry to use.
|
void |
setBeanClassLoader(ClassLoader classLoader)
Callback that supplies the bean
class loader to
a bean instance. |
void |
setPostInterceptors(Object[] postInterceptors)
Set additional interceptors (or advisors) to be applied after the
implicit transaction interceptor.
|
void |
setPreInterceptors(Object[] preInterceptors)
Set additional interceptors (or advisors) to be applied before the
implicit transaction interceptor, e.g.
|
void |
setProxyClassLoader(ClassLoader classLoader)
Set the ClassLoader to generate the proxy class in.
|
void |
setProxyInterfaces(Class<?>[] proxyInterfaces)
Specify the set of interfaces being proxied.
|
void |
setTarget(Object target)
Set the target object, that is, the bean to be wrapped with a transactional proxy.
|
copyFrom, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setExposeProxy, setFrozen, setOpaque, setOptimize, setProxyTargetClass, toStringpublic void setTarget(Object target)
The target may be any object, in which case a SingletonTargetSource will be created. If it is a TargetSource, no wrapper TargetSource is created: This enables the use of a pooling or prototype TargetSource etc.
public void setProxyInterfaces(Class<?>[] proxyInterfaces)
If not specified (the default), the AOP infrastructure works out which interfaces need proxying by analyzing the target, proxying all the interfaces that the target object implements.
public void setPreInterceptors(Object[] preInterceptors)
You may specify any AOP Alliance MethodInterceptors or other Spring AOP Advices, as well as Spring AOP Advisors.
PerformanceMonitorInterceptorpublic void setPostInterceptors(Object[] postInterceptors)
You may specify any AOP Alliance MethodInterceptors or other Spring AOP Advices, as well as Spring AOP Advisors.
public void setAdvisorAdapterRegistry(AdvisorAdapterRegistry advisorAdapterRegistry)
GlobalAdvisorAdapterRegistrypublic void setProxyClassLoader(ClassLoader classLoader)
Default is the bean ClassLoader, i.e. the ClassLoader used by the containing BeanFactory for loading all bean classes. This can be overridden here for specific proxies.
public void setBeanClassLoader(ClassLoader classLoader)
BeanClassLoaderAwareclass loader to
a bean instance.
Invoked after the population of normal bean properties but
before an initialization callback such as
InitializingBean's
InitializingBean.afterPropertiesSet()
method or a custom init-method.
setBeanClassLoader in interface BeanClassLoaderAwareclassLoader - the owning class loaderpublic void afterPropertiesSet()
InitializingBeanBeanFactory after it has set all bean properties
and satisfied BeanFactoryAware, ApplicationContextAware etc.
This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.
afterPropertiesSet in interface InitializingBeanprotected TargetSource createTargetSource(Object target)
target - the target. If this is an implementation of TargetSource it is
used as our TargetSource; otherwise it is wrapped in a SingletonTargetSource.protected void postProcessProxyFactory(ProxyFactory proxyFactory)
ProxyFactory
before creating the proxy instance with it.proxyFactory - the AOP ProxyFactory about to be usedpublic Object getObject()
FactoryBeanAs 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.
getObject in interface FactoryBean<Object>null)FactoryBeanNotInitializedException@Nullable public Class<?> getObjectType()
FactoryBeannull 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.
getObjectType in interface FactoryBean<Object>null if not known at the time of the callListableBeanFactory.getBeansOfType(java.lang.Class<T>)public final boolean isSingleton()
FactoryBeanFactoryBean.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 return true
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 extended SmartFactoryBean interface
may explicitly indicate independent instances through its
SmartFactoryBean.isPrototype() method. Plain FactoryBean
implementations which do not implement this extended interface are
simply assumed to always return independent instances if the
isSingleton() implementation returns false.
The default implementation returns true, since a
FactoryBean typically manages a singleton instance.
isSingleton in interface FactoryBean<Object>FactoryBean.getObject(),
SmartFactoryBean.isPrototype()protected abstract Object createMainInterceptor()
Pre-interceptors will be applied before, post-interceptors will be applied after this interceptor.