3

我正在使用 Netbeans 并正在试验 EJB。

我有两个项目（2 个单独的应用程序）

1- 一个名为 EnterpriseApp 的 Java ME 项目

2- 一个名为 Test 的标准 Java SE 项目

现在这就是我所做的 - 在 EnterpriseApp 中，我生成了一个名为 TestEJB 的无状态 EJB，它具有本地和远程接口。对于远程项目选择，我选择了测试应用程序。简而言之，bean 代码看起来像这样

@Stateless
public class TestEjb implements TestEjbRemote, TestEjbLocal 
{
    @Override
    public String Try() 
    {
        return "Hello World";
    } 
}

在 Java SE 客户端项目中，这是我试图访问 bean 的主要类：

public class Main 
{
    public static void main(String[] args) 
    {
        try 
        {
                Properties props = new Properties();
                props.load(new FileInputStream("jndi.properties"));
                InitialContext ctx = new InitialContext(props);
                TestEjbRemote testEJB = (TestEjbRemote) ctx.lookup("stateless.TestEjbRemote");
                System.out.println(testEJB.Try());
        } 
        catch (NamingException nex) 
        {
                nex.printStackTrace();
        } 
        catch (FileNotFoundException fnfex) 
        {
                fnfex.printStackTrace();
        } 
        catch (IOException ioex) 
        {
                ioex.printStackTrace();
        }
    }


}

这是 JNDI.properties 文件的内容

java.naming.factory.initial = com.sun.enterprise.naming.SerialInitContextFactory
java.naming.factory.url.pkgs = com.sun.enterprise.naming
java.naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl
#optional.  Defaults to localhost.  Only needed if web server is running
#on a different host than the appserver
org.omg.CORBA.ORBInitialHost = localhost
#optional.  Defaults to 3700.  Only needed if target orb port is not 3700.
org.omg.CORBA.ORBInitialPort = 3700

我得到这个错误

 TestEjbRemote testEJB = (TestEjbRemote) ctx.lookup("stateless.TestEjbRemote");

javax.naming.NamingException: Lookup failed for 'stateless.TestEjbRemote' in SerialContext[myEnv={org.omg.CORBA.ORBInitialPort=3700, java.naming.factory.initial=com.sun.enterprise.naming.SerialInitContextFactory, org.omg.CORBA.ORBInitialHost=localhost, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: stateless.TestEjbRemote not found]
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at Main.main(Main.java:19)
Caused by: javax.naming.NameNotFoundException: stateless.TestEjbRemote not found
    at com.sun.enterprise.naming.impl.TransientContext.doLookup(TransientContext.java:248)
    at com.sun.enterprise.naming.impl.TransientContext.lookup(TransientContext.java:215)
    at com.sun.enterprise.naming.impl.SerialContextProviderImpl.lookup(SerialContextProviderImpl.java:77)
    at com.sun.enterprise.naming.impl.RemoteSerialContextProviderImpl.lookup(RemoteSerialContextProviderImpl.java:109)
    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.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:144)
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:174)
    at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:528)
    at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:199)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1624)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1486)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:990)
    at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:214)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:742)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.dispatch(CorbaMessageMediatorImpl.java:539)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.doWork(CorbaMessageMediatorImpl.java:2324)
    at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
    at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)

关于如何解决此问题的任何建议？

4

1 回答 1

1

从概念上讲，你做的一切都是正确的。所以这应该是一些“错误名称”相关的问题。

好消息，你可以检查它:)

EJB一旦被应用服务器识别就被部署了。这意味着存根由 AS 创建并放入 JNDI 树中。这意味着一旦服务器启动，您可以转到 JNDI 树查看器（通常是应用服务器提供的）并查看部署在哪里。我相信，鉴于您已经正确设置了罐子，这应该可以工作。

希望这可以帮助

于 2012-07-15T04:55:25.417 回答