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Spring Framework 2.0.5 API 文档英文版
SimpleRemoteSlsbInvokerInterceptor (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版
org.springframework.ejb.access
Class SimpleRemoteSlsbInvokerInterceptor
java.lang.Object
org.springframework.jndi.JndiAccessor
org.springframework.jndi.JndiLocatorSupport
org.springframework.jndi.JndiObjectLocator
org.springframework.ejb.access.AbstractSlsbInvokerInterceptor
org.springframework.ejb.access.AbstractRemoteSlsbInvokerInterceptor
org.springframework.ejb.access.SimpleRemoteSlsbInvokerInterceptor
- All Implemented Interfaces:
- Advice, Interceptor, MethodInterceptor, InitializingBean
- Direct Known Subclasses:
- SimpleRemoteStatelessSessionProxyFactoryBean
public class SimpleRemoteSlsbInvokerInterceptor
- extends AbstractRemoteSlsbInvokerInterceptor
Basic invoker for a remote Stateless Session Bean.
"Creates" a new EJB instance for each invocation.
See JndiObjectLocator for info on
how to specify the JNDI location of the target EJB.
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 invoker is typically used with an RMI business interface, which serves
as super-interface of the EJB component interface. Alternatively, this invoker
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.
- Since:
- 09.05.2003
- Author:
- Rod Johnson, Juergen Hoeller
- See Also:
RemoteAccessException,
AbstractSlsbInvokerInterceptor.setLookupHomeOnStartup(boolean),
AbstractSlsbInvokerInterceptor.setCacheHome(boolean),
AbstractRemoteSlsbInvokerInterceptor.setRefreshHomeOnConnectFailure(boolean)
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SimpleRemoteSlsbInvokerInterceptor
public SimpleRemoteSlsbInvokerInterceptor()
doInvoke
protected Object doInvoke(MethodInvocation invocation)
throws Throwable
- This implementation "creates" a new EJB instance for each invocation.
Can be overridden for custom invocation strategies.
Alternatively, override getSessionBeanInstance and
releaseSessionBeanInstance to change EJB instance creation,
for example to hold a single shared EJB instance.
- Specified by:
doInvoke in class AbstractRemoteSlsbInvokerInterceptor
- Parameters:
invocation - the AOP method invocation
- Returns:
- the invocation result, if any
- Throws:
Throwable - in case of invocation failure- See Also:
AbstractSlsbInvokerInterceptor.getHome(),
AbstractRemoteSlsbInvokerInterceptor.newSessionBeanInstance()
getSessionBeanInstance
protected EJBObject getSessionBeanInstance()
throws NamingException,
InvocationTargetException
- Return an EJB instance to delegate the call to.
Default implementation delegates to newSessionBeanInstance.
- Throws:
NamingException - if thrown by JNDI
InvocationTargetException - if thrown by the create method- See Also:
AbstractRemoteSlsbInvokerInterceptor.newSessionBeanInstance()
releaseSessionBeanInstance
protected void releaseSessionBeanInstance(EJBObject ejb)
- Release the given EJB instance.
Default implementation delegates to removeSessionBeanInstance.
- Parameters:
ejb - the EJB instance to release- See Also:
AbstractRemoteSlsbInvokerInterceptor.removeSessionBeanInstance(javax.ejb.EJBObject)
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