@客户端中的EJB注释

使用netbeans,我在包含 main() ,它的工作原理是:

import javax.ejb.EJB;

public class Master {
    @EJB
    TestBeanARemote x;

    public static void main(String[] args) {
        Master m = new Master();
        m.doStuff();
    }
//doStuff includes x, but it works, so who cares.
...

但是,如果我在一个被调用的类中这样做,它就失败了。一个被调用的类似乎要求我避免使用注释,而是使用一个整体 InitialContext() 设置。

String testRun(String arg) {
   InitialContext ic;
    try {
        ic = new InitialContext();
        x = (TestBeanARemote) ic.lookup("com.bnncpa.testing.TestBeanARemote");
        return x.testRun(arg);

    }

完整的失败副本如下:

package enterpriseapplication1;
public class Main {

    private Secondary x = new Secondary();

    public static void main(String[] args) {
        Main m = new Main();
        m.doStuff();
    }

    public void doStuff() {
        System.out.println(x.testRun("bar"));
    }

}

package enterpriseapplication1;
import org.mine.testing.TestBeanARemote;
import javax.ejb.EJB;

public class Secondary {
   @EJB
   static private TestBeanARemote x;

   String testRun(String arg) {
       return x.testRun(arg);
   }
}

有什么特别的原因吗 @EJB 可能不适用于包的所有类?我想简单地标记一下 EJB 无论我在哪里使用。

有没有更好的方法来解决这个我完全错过的问题?

编辑:为了解决使用AppClient的问题,下面是我的堆栈跟踪:

May 11, 2009 4:24:46 PM com.sun.enterprise.appclient.MainWithModuleSupport <init>
WARNING: ACC003: Application threw an exception.
java.lang.NullPointerException
    at enterpriseapplication1.Secondary.testRun(Secondary.java:20)
    at enterpriseapplication1.Main.doStuff(Main.java:27)
    at enterpriseapplication1.Main.main(Main.java:23)
    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.enterprise.util.Utility.invokeApplicationMain(Utility.java:266)
    at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:449)
    at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:259)
    at com.sun.enterprise.appclient.Main.main(Main.java:200)
Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:461)
    at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:259)
    at com.sun.enterprise.appclient.Main.main(Main.java:200)
Caused by: java.lang.reflect.InvocationTargetException
    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.enterprise.util.Utility.invokeApplicationMain(Utility.java:266)
    at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:449)
    ... 2 more
Caused by: java.lang.NullPointerException
    at enterpriseapplication1.Secondary.testRun(Secondary.java:20)
    at enterpriseapplication1.Main.doStuff(Main.java:27)
    at enterpriseapplication1.Main.main(Main.java:23)
    ... 8 more
Java Result: 1