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java.lang.Object org.springframework.aop.framework.ProxyConfig org.springframework.aop.framework.AbstractSingletonProxyFactoryBean
public abstract class AbstractSingletonProxyFactoryBean
Convenient proxy factory bean superclass for proxy factory beans that create only singletons.
Manages pre- and post-interceptors (references, rather than
interceptor names, as in ProxyFactoryBean
) and provides
consistent interface management.
Constructor Summary | |
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AbstractSingletonProxyFactoryBean()
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Method Summary | |
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void |
afterPropertiesSet()
Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware). |
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. |
protected Object |
getProxy(AopProxy aopProxy)
Return the proxy object to expose. |
boolean |
isSingleton()
Is the object managed by this factory a singleton? |
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, e.g. |
void |
setPreInterceptors(Object[] preInterceptors)
Set additional interceptors (or advisors) to be applied before the implicit transaction interceptor, e.g. |
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. |
Methods inherited from class org.springframework.aop.framework.ProxyConfig |
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copyFrom, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setExposeProxy, setFrozen, setOpaque, setOptimize, setProxyTargetClass, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public AbstractSingletonProxyFactoryBean()
Method Detail |
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public 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)
PerformanceMonitorInterceptor
public void setPostInterceptors(Object[] postInterceptors)
Note that this is just necessary if you rely on those interceptors in general: HibernateTemplate and JdoTemplate work nicely with JtaTransactionManager through implicit on-demand thread binding.
HibernateInterceptor
,
JdoInterceptor
public void setAdvisorAdapterRegistry(AdvisorAdapterRegistry advisorAdapterRegistry)
GlobalAdvisorAdapterRegistry
public void setBeanClassLoader(ClassLoader classLoader)
BeanClassLoaderAware
class 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 BeanClassLoaderAware
classLoader
- the owning class loader; may be null
in
which case a default ClassLoader
must be used, for example
the ClassLoader
obtained via
ClassUtils.getDefaultClassLoader()
public void afterPropertiesSet()
InitializingBean
This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.
afterPropertiesSet
in interface InitializingBean
protected TargetSource createTargetSource(Object target)
target
- target. If this is an implementation of TargetSource it is
used as our TargetSource; otherwise it is wrapped in a SingletonTargetSource.
protected Object getProxy(AopProxy aopProxy)
The default implementation uses a getProxy
call with
the factory's bean class loader. Can be overridden to specify a
custom class loader.
aopProxy
- the prepared AopProxy instance to get the proxy from
AopProxy.getProxy(ClassLoader)
public Object getObject()
FactoryBean
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.
getObject
in interface FactoryBean
null
)FactoryBeanNotInitializedException
public Class getObjectType()
FactoryBean
null
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
null
if not known at the time of the callListableBeanFactory.getBeansOfType(java.lang.Class)
public final boolean isSingleton()
FactoryBean
FactoryBean.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
.
isSingleton
in interface FactoryBean
FactoryBean.getObject()
,
SmartFactoryBean.isPrototype()
protected abstract Object createMainInterceptor()
Pre-interceptors will be applied before, post-interceptors will be applied after this interceptor.
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