EJB异常日记

本文探讨了在Java EE环境中配置EJB时遇到的接口声明问题,包括@Remote和@Local注解的正确使用方法,以及如何避免因接口声明不当导致的EJBException异常。

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javax.ejb.EJBException: Local and Remote Interfaces cannot have duplicate interface for bean HelloWorldBean
at org.jboss.ejb3.SessionContainer.checkForDuplicateLocalAndRemoteInterfaces(SessionContainer.java:134)
@Remote和@Local必须指定接口的class,也就是value值
例如:
@Remote(HelloWorld.class)  //申明是一个远程接口,不写默认是本地接口
@Local(HelloWorldLocal.class)  //申明是一个本地接口


Exception in thread "main" javax.ejb.EJBException: Invalid (i.e. remote) invocation of local interface (null container)
at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:80)
--当在不同的jvm内,只能通过远程的JNDI命名格式进行访问,也就是类的实现类/romote
--当在同一个jvm内,只能通过远程的JNDI命名格式进行访问,也就是类的实现类/local

Files contained in javax.ejb.jar: META-INF/MANIFEST.MF javax.ejb.AccessLocalException.class javax.ejb.AccessTimeout.class javax.ejb.ActivationConfigProperty.class javax.ejb.AfterBegin.class javax.ejb.AfterCompletion.class javax.ejb.ApplicationException.class javax.ejb.Asynchronous.class javax.ejb.AsyncResult.class javax.ejb.BeforeCompletion.class javax.ejb.ConcurrencyManagement.class javax.ejb.ConcurrencyManagementType.class javax.ejb.ConcurrentAccessException.class javax.ejb.ConcurrentAccessTimeoutException.class javax.ejb.CreateException.class javax.ejb.DependsOn.class javax.ejb.DuplicateKeyException.class javax.ejb.EJB.class javax.ejb.EJBAccessException.class javax.ejb.EJBContext.class javax.ejb.EJBException.class javax.ejb.EJBHome.class javax.ejb.EJBLocalHome.class javax.ejb.EJBLocalObject.class javax.ejb.EJBMetaData.class javax.ejb.EJBObject.class javax.ejb.EJBs.class javax.ejb.EJBTransactionRequiredException.class javax.ejb.EJBTransactionRolledbackException.class javax.ejb.embeddable.EJBContainer.class javax.ejb.EnterpriseBean.class javax.ejb.EntityBean.class javax.ejb.EntityContext.class javax.ejb.FinderException.class javax.ejb.Handle.class javax.ejb.HomeHandle.class javax.ejb.IllegalLoopbackException.class javax.ejb.Init.class javax.ejb.Local.class javax.ejb.LocalBean.class javax.ejb.LocalHome.class javax.ejb.Lock.class javax.ejb.LockType.class javax.ejb.MessageDriven.class javax.ejb.MessageDrivenBean.class javax.ejb.MessageDrivenContext.class javax.ejb.NoMoreTimeoutsException.class javax.ejb.NoSuchEJBException.class javax.ejb.NoSuchEntityException.class javax.ejb.NoSuchObjectLocalException.class javax.ejb.ObjectNotFoundException.class javax.ejb.PostActivate.class javax.ejb.PrePassivate.class javax.ejb.Remote.class javax.ejb.RemoteHome.class javax.ejb.Remove.class javax.ejb.RemoveException.class javax.ejb.Schedule.class javax.ejb.ScheduleExpression.class javax.ejb.Schedules.class javax.ejb.SessionBean.class javax.ejb.SessionContext.class javax.ejb.Session
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