public class SimpleRemoteStatelessSessionProxyFactoryBean extends SimpleRemoteSlsbInvokerInterceptor implements FactoryBean<Object>, BeanClassLoaderAware
FactoryBean for remote SLSB proxies.
Designed for EJB 2.x, but works for EJB 3 Session Beans as well.
See JndiObjectLocator for info on
how to specify the JNDI location of the target EJB.
If you want control over interceptor chaining, use an AOP ProxyFactoryBean with SimpleRemoteSlsbInvokerInterceptor rather than rely on this class.
In a bean container, this class is normally best used as a singleton. However, if that bean container pre-instantiates singletons (as do the XML ApplicationContext variants) you may have a problem if the bean container is loaded before the EJB container loads the target EJB. That is because by default the JNDI lookup will be performed in the init method of this class and cached, but the EJB will not have been bound at the target location yet. The best solution is to set the lookupHomeOnStartup property to false, in which case the home will be fetched on first access to the EJB. (This flag is only true by default for backwards compatibility reasons).
This proxy factory is typically used with an RMI business interface, which serves as super-interface of the EJB component interface. Alternatively, this factory can also proxy a remote SLSB with a matching non-RMI business interface, i.e. an interface that mirrors the EJB business methods but does not declare RemoteExceptions. In the latter case, RemoteExceptions thrown by the EJB stub will automatically get converted to Spring's unchecked RemoteAccessException.
RemoteAccessException,
AbstractSlsbInvokerInterceptor.setLookupHomeOnStartup(boolean),
AbstractSlsbInvokerInterceptor.setCacheHome(boolean),
AbstractRemoteSlsbInvokerInterceptor.setRefreshHomeOnConnectFailure(boolean)CONTAINER_PREFIXlogger| Constructor and Description |
|---|
SimpleRemoteStatelessSessionProxyFactoryBean() |
| Modifier and Type | Method and Description |
|---|---|
void |
afterPropertiesSet()
Fetches EJB home on startup, if necessary.
|
Class |
getBusinessInterface()
Return the business interface of the EJB we're proxying.
|
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)? |
void |
setBeanClassLoader(ClassLoader classLoader)
Callback that supplies the bean
class loader to
a bean instance. |
void |
setBusinessInterface(Class businessInterface)
Set the business interface of the EJB we're proxying.
|
destroy, doInvoke, getSessionBeanInstance, refreshHome, releaseSessionBeanInstance, setCacheSessionBeangetCreateMethod, invokeInContext, isConnectFailure, isHomeRefreshable, lookup, newSessionBeanInstance, refreshAndRetry, removeSessionBeanInstance, setHomeInterface, setRefreshHomeOnConnectFailurecreate, getHome, invoke, setCacheHome, setExposeAccessContext, setLookupHomeOnStartupgetExpectedType, getJndiName, setExpectedType, setJndiNameconvertJndiName, isResourceRef, lookup, lookup, setResourceRefgetJndiEnvironment, getJndiTemplate, setJndiEnvironment, setJndiTemplatepublic SimpleRemoteStatelessSessionProxyFactoryBean()
public void setBusinessInterface(Class businessInterface)
You can also specify a matching non-RMI business interface, i.e. an interface that mirrors the EJB business methods but does not declare RemoteExceptions. In this case, RemoteExceptions thrown by the EJB stub will automatically get converted to Spring's generic RemoteAccessException.
businessInterface - the business interface of the EJBpublic Class getBusinessInterface()
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 loader; may be null in
which case a default ClassLoader must be used, for example
the ClassLoader obtained via
ClassUtils.getDefaultClassLoader()public void afterPropertiesSet()
throws NamingException
AbstractSlsbInvokerInterceptorafterPropertiesSet in interface InitializingBeanafterPropertiesSet in class AbstractSlsbInvokerInterceptorNamingExceptionAbstractSlsbInvokerInterceptor.setLookupHomeOnStartup(boolean),
AbstractSlsbInvokerInterceptor.refreshHome()public 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)FactoryBeanNotInitializedExceptionpublic 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 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.
isSingleton in interface FactoryBean<Object>FactoryBean.getObject(),
SmartFactoryBean.isPrototype()