org.springframework.ejb.access
Class SimpleRemoteSlsbInvokerInterceptor

java.lang.Object
  org.springframework.jndi.AbstractJndiLocator
      org.springframework.ejb.access.AbstractSlsbInvokerInterceptor
          org.springframework.ejb.access.AbstractRemoteSlsbInvokerInterceptor
              org.springframework.ejb.access.SimpleRemoteSlsbInvokerInterceptor

All Implemented Interfaces:

org.aopalliance.aop.Advice, InitializingBean, org.aopalliance.intercept.Interceptor, org.aopalliance.intercept.MethodInterceptor

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 AbstractJndiLocator 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 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 solution is to not pre-instantiate this factory object, but allow it to be created on first use. In the XML containers, this is controlled via the "lazy-init" attribute.

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-May-2003

Version:

$Id: SimpleRemoteSlsbInvokerInterceptor.java,v 1.10 2004/03/19 21:35:54 johnsonr Exp $

Author:

Rod Johnson, Juergen Hoeller

See Also:

RemoteAccessException

Field Summary

Fields inherited from class org.springframework.jndi.AbstractJndiLocator

CONTAINER_PREFIX, logger

Constructor Summary

SimpleRemoteSlsbInvokerInterceptor()
Constructor for use as JavaBean.

SimpleRemoteSlsbInvokerInterceptor(java.lang.String jndiName, boolean resourceRef)
Convenient constructor for programmatic use.

Method Summary

java.lang.Object

invoke(org.aopalliance.intercept.MethodInvocation invocation) This is the last invoker in the chain.

Methods inherited from class org.springframework.ejb.access.AbstractRemoteSlsbInvokerInterceptor

newSessionBeanInstance

Methods inherited from class org.springframework.ejb.access.AbstractSlsbInvokerInterceptor

afterLocated, create, getCachedEjbHome, located

Methods inherited from class org.springframework.jndi.AbstractJndiLocator

afterPropertiesSet, getJndiEnvironment, getJndiName, getJndiTemplate, isResourceRef, setJndiEnvironment, setJndiName, setJndiTemplate, setResourceRef

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleRemoteSlsbInvokerInterceptor

public SimpleRemoteSlsbInvokerInterceptor()

Constructor for use as JavaBean. Sets "resourceRef" to false by default.

See Also:

AbstractJndiLocator.setResourceRef(boolean)

SimpleRemoteSlsbInvokerInterceptor

public SimpleRemoteSlsbInvokerInterceptor(java.lang.String jndiName,
                                          boolean resourceRef)
                                   throws org.aopalliance.aop.AspectException

Convenient constructor for programmatic use.

See Also:

AbstractJndiLocator.setJndiName(java.lang.String), AbstractJndiLocator.setResourceRef(boolean)

Method Detail

invoke

public java.lang.Object invoke(org.aopalliance.intercept.MethodInvocation invocation)
                        throws java.lang.Throwable

This is the last invoker in the chain. "Creates" a new EJB instance for each invocation. Can be overridden for custom invocation strategies.

Throws:

java.lang.Throwable