WebLogic中的本地會話Bean JNDI查找-NameNotFoundException

Question

我無法從WebLogic 10.3.6的EJB模塊中查找本地會話bean。

在下面的示例中，我可以使用注入，但是在實際產品中，我們將需要從非托管對象訪問本地會話Bean，因此這是為了演示此問題。 我也知道它將與遠程接口一起使用，但是為什么要這樣做，因為我應該能夠在本地進行操作。

@Local
public interface MyBeanLocal {

    public void foo();

}

@Stateless(name = "MyBean")
public class MyBean implements MyBeanLocal {

    @Override
    public void foo() {
        System.out.println("Foo");      
    }

}

客戶端在這里嘗試查找本地會話bean。 此代碼似乎在其他應用程序服務器中也可以使用，但在WebLogic中卻不起作用。

@Stateless
public class CustomerInbound implements CustomerInboundLocal {

    @Override
    public void someOperation() throws Exception {

        try {

            // Exception is thrown here when looking up the object
            MyBeanLocal testLocal = (MyBeanLocal) 
                    new InitialContext().lookup("java:comp/env/MyBean");

            testLocal.foo();

        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
    }
}

例外：

javax.naming.NameNotFoundException: While trying to look up comp/env/MyBean in /app/ejb/test-inject#CustomerInbound.; remaining name 'comp/env/MyBean'
    at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:1139)
    at weblogic.jndi.internal.ApplicationNamingNode.lookup(ApplicationNamingNode.java:144)
    at weblogic.jndi.internal.WLEventContextImpl.lookup(WLEventContextImpl.java:254)
    at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:412)
    at weblogic.jndi.factories.java.ReadOnlyContextWrapper.lookup(ReadOnlyContextWrapper.java:45)
    at weblogic.jndi.internal.AbstractURLContext.lookup(AbstractURLContext.java:130)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at beans.CustomerInbound.someOperation(CustomerInbound.java:16)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.oracle.pitchfork.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:34)
    at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:54)
    at com.oracle.pitchfork.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:42)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.sun.proxy.$Proxy134.someOperation(Unknown Source)
    at beans.CustomerInbound_xaxie8_CustomerInboundLocalImpl.__WL_invoke(Unknown Source)
    at weblogic.ejb.container.internal.SessionLocalMethodInvoker.invoke(SessionLocalMethodInvoker.java:39)
    at beans.CustomerInbound_xaxie8_CustomerInboundLocalImpl.someOperation(Unknown Source)
    at beans.CustomerWSFacade.customerIn(CustomerWSFacade.java:16)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.oracle.pitchfork.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:34)
    at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:54)
    at com.oracle.pitchfork.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:42)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
    at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
    at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.sun.proxy.$Proxy133.customerIn(Unknown Source)
    at beans.CustomerWSFacade_jg1q6w_WSOImpl.__WL_invoke(Unknown Source)
    at weblogic.ejb.container.internal.WSOMethodInvoker.invoke(WSOMethodInvoker.java:22)
    at beans.CustomerWSFacade_jg1q6w_WSOImpl.__WL_customerIn_WS(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at weblogic.wsee.server.ejb.WsEjb.invoke(WsEjb.java:54)
    at weblogic.wsee.jaxws.WLSEjbInstanceResolver$WLSEjbInvoker.invoke(WLSEjbInstanceResolver.java:192)
    at weblogic.wsee.jaxws.WLSInstanceResolver$WLSInvoker.invoke(WLSInstanceResolver.java:74)
    at com.sun.xml.ws.server.InvokerTube$2.invoke(InvokerTube.java:151)
    at com.sun.xml.ws.server.sei.EndpointMethodHandlerImpl.invoke(EndpointMethodHandlerImpl.java:268)
    at com.sun.xml.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:100)
    at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:866)
    at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:815)
    at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:778)
    at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:680)
    at com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:403)
    at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:539)
    at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:253)
    at com.sun.xml.ws.transport.http.servlet.ServletAdapter.handle(ServletAdapter.java:140)
    at weblogic.wsee.jaxws.WLSServletAdapter.handle(WLSServletAdapter.java:171)
    at weblogic.wsee.jaxws.HttpServletAdapter$AuthorizedInvoke.run(HttpServletAdapter.java:708)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:146)
    at weblogic.wsee.util.ServerSecurityHelper.authenticatedInvoke(ServerSecurityHelper.java:103)
    at weblogic.wsee.jaxws.HttpServletAdapter$3.run(HttpServletAdapter.java:311)
    at weblogic.wsee.jaxws.HttpServletAdapter.post(HttpServletAdapter.java:336)
    at weblogic.wsee.jaxws.JAXWSServlet.doRequest(JAXWSServlet.java:99)
    at weblogic.servlet.http.AbstractAsyncServlet.service(AbstractAsyncServlet.java:99)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:184)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3732)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3696)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2273)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2179)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

Answer 1

您必須聲明對EJB的引用才能從java:comp進行查找。 您可以使用@EJB批注（帶或不帶注入，請參閱@EJB批注做什么？ ），或者可以使用<ejb-ref>在web.xml中聲明引用。

否則，如果您使用的是支持EE 6的WebLogic的較新版本，則可以使用可移植的java:global ， java:app或java:module命名空間來直接查找EJB，但僅限於WebLogic 10.3.6之后要支持EE 5，您將需要使用EJB的已配置綁定名稱。