我试图弄清楚为什么我需要同时实现这两个接口以避免部署问题.

Java代码

ExamplePlanAssembler.java

@Local
public interface ExamplePlanAssembler {
   ExamplePlan toBO(ExamplePlanEntity entity);
}

ExtendedExamplePlanAssembler.java

@Local
public interface ExtendedExamplePlanAssembler 
extends ExamplePlanAssembler{
   ExtExamplePlan toBO(ExamplePlanEntity entity, ExtExamplePlanEntity extEntity);
}

ExtendedExamplePlanAssemblerImpl.java

@Stateless
public class ExtendedExamplePlanAssemblerImpl 
implements ExtendedExamplePlanAssembler {
   /* Method impls removed */
}

ExamplePlanServiceImpl.java

@Stateless
public class ExamplePlanServiceImpl 
implements ExamplePlanService {
   private ExamplePlanAssembler examplePlanAssembler ;
   @EJB
   public void setAssembler(ExamplePlanAssembler examplePlanAssembler) {
       this.examplePlanAssembler = examplePlanAssembler;
    }
}

部署错误

[#|.507-0500|SEVERE|gf3.1.2|javax.enterprise.system.tools.deployment.org.glassfish.deployment.common
|_ThreadID=83;_ThreadName=Thread-7;|Cannot resolve reference Local ejb-ref name=
com.myco.services.business.ExampleServiceImpl/examplePlanAssembler,Local 3.x interface =
com.myco.services.assembly.ExamplePlanAssembler,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session|#]

[#|.508-0500|SEVERE|gf3.1.2|javax.enterprise.system.core.com.sun.enterprise.v3.server
|_ThreadID=83;_ThreadName=Thread-7;|Exception while deploying the app [mycoservicesear]|#]

[#|.508-0500|SEVERE|gf3.1.2|javax.enterprise.system.core.com.sun.enterprise.v3.server
|_ThreadID=83;_ThreadName=Thread-7;|Cannot resolve reference Local ejb-ref name=
com.myco.services.business.ExampleServiceImpl/examplePlanAssembler,Local 3.x interface =
com.myco.services.assembly.ExamplePlanAssembler,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session
java.lang.RuntimeException: Cannot resolve reference Local ejb-ref name=
com.myco.services.business.ExampleServiceImpl/examplePlanAssembler,Local 3.x interface =
com.myco.services.assembly.ExamplePlanAssembler,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session


[#|.516-0500|SEVERE|gf3.1.2|javax...gf.deployment.admin
|_ThreadID=83;_ThreadName=Thread-7;|Exception while deploying the app [mycoservicesear] : Cannot resolve reference Local ejb-ref name=
com.myco.services.business.ExampleServiceImpl/examplePlanAssembler,Local 3.x interface =
com.myco.services.assembly.ExamplePlanAssembler,ejb-link=null,lookup=,mappedName=,jndi-name=,refType=Session|#]

修复？！

如果我更改接口隐式以不仅实现ExtendedExamplePlanAssembler接口,而且还实现父ExamplePlanAssembler接口,则部署错误将消失.

ExtendedExamplePlanAssemblerImpl.java(v2)

@Stateless
public class ExtendedExamplePlanAssemblerImpl 
implements ExtendedExamplePlanAssembler,  ExamplePlanAssembler{
   /* Method impls removed */
}

问题

为什么将父接口添加到我的工具声明中可以解决部署问题？

解决方法:

EJB Spec这样说,

举例来说,特定会话bean公开的客户端视图不会被以下子类继承：
也碰巧定义了一个会话bean.

@Stateless
public class A implements Foo { ... }
@Stateless
public class B extends A implements Bar { ... }

假设Foo和Bar是本地业务接口,并且没有关联的部署描述符,
会话Bean A公开本地业务接口Foo,会话Bean B公开本地业务接口
吧,但不行.

参考here.EJB3.1Spec的4.9.2.1节