Java class calling ejb

hi,
i need to write a class file that calls an ejb. i found out that i need to include the context and also the object reference. but i still cant get it to call the ejb. does the class file need to be in the same folder as the ejbs?
thanks

this is my code
          Context initial = new InitialContext();
          Object obj = initial.lookup("WFBean");
          WF_RemoteHome home =     (WF_RemoteHome)PortableRemoteObject.narrow(obj,WF_RemoteHome.class);
               WF_Remote wf = home.create();
               int check = wf.getInfo("something");
               if(check==0){
                    System.out.print("YES");
               }else{
                    System.out.print("NO");
               }however when i run it, it gives me this error
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
     java.rmi.RemoteException
     at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:188)
     at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:172)
     at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:119)
     at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(BCELStubBase.java:197)
     at com.WF_Remote_DynamicStub.getInfo(WF_Remote_DynamicStub.java)
     at watcher.extBean(watcher.java:100)
     at watcher.main(watcher.java:59)
Caused by: java.rmi.RemoteException
     at com.sun.enterprise.iiop.POAProtocolMgr.mapException(POAProtocolMgr.java:234)
     at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1280)
     at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:197)
     at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:107)
     at $Proxy552.getnfo(Unknown Source)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:121)
     at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:650)
     at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:193)
     at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1705)
     at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1565)
     at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:947)
     at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:178)
     at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:717)RemoteException occurred in server thread; nested exception is:
     java.rmi.RemoteException
     at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.dispatch(SocketOrChannelConnectionImpl.java:473)
     at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.doWork(SocketOrChannelConnectionImpl.java:1270)
     at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:479)how do i solve this? what i want to archieve is to be able to call the ejb which is in my local application server from my java class file so that i can make the class file run as a service.
thanks

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          /*Call the servlet PushPage*/
          try {
            URL url = new URL("http://localhost/rimpush/PushPage");
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
        catch ( MalformedURLException ex ) {
            // a real program would need to handle this exception
        catch ( IOException ex ) {
            // a real program would need to handle this exception
}Any idea would be gracefully appreciated
Thank you.

Your ContactServlet program does makes a request to the "PushPage" servlet independant of the browser. In fact you may as well have just opened up a new browser window - it is the same effect.
In most cases the only way you can put a new page in the browser is if the browser requests it. So if you want something to be loaded into the browser with page1.jsp displayed in it, then that browser needs to make a request to the server.
The standard way of doing this is to either use a meta-refresh tag on the page, or a javascript window.setTimeout.
If you want a "push" technology, you might take a look at [url http://www.pushlets.com] pushlets . I haven't actually used them, but they might be applicable in this case.
Cheers,
evnafets

[b]What is content Provider java Class & How is it useful?.[/b]

Hi,
I would like to know more details on What is content Provider java Class & How is it useful?. Appreciate precise answers on this.
Thank you,
Renga
Email : [email protected]

Portal Server allows multiple sources of information, applications, and services to be displayed within a single page or set of pages that the user can view in a browser. The page in which the content is included is known as the desktop. The various sources of content are displayed in rectangular areas arranged in rows and columns within the desktop called channels. A Java class, called a provider, is responsible for converting the content in a file, or the output of an application or service into the proper format for a channel. A number of providers are shipped with the Portal Server including a bookmark provider, an application provider, and a notes provider. As the desktop is imaged, each provider is queried in turn for the content of its associated channel.

WDP calling EJB and passing objects of classes from Java project

Hi.
We have Java project which contains some classes common for all projects (like xxx.Version).
We have EJB project which defines EJB interface using these common classes (like getVersion(String,int): xxx.Version and getCurrency(String,xxx.Version,int):xxx.Currency ).
We have Web Dynpro project which calls EJB:
1. Lookup is successful
2. call to getVersion is successful
3. call to getCurrency fails with NoSuchMethodException:
xxx.XXXObjectImpl0.getCurrency(java.lang.String, xxx.Version, int)
 at java.lang.Class.getMethod(Class.java:986)
 at com.sap.engine.services.rmi_p4.reflect.LocalInvocationHandler.invokeInternal(LocalInvocationHandler.java:51)
 at com.sap.engine.services.rmi_p4.reflect.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:53)
 at $Proxy346.getCurrency(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:324)
 at com.sap.engine.services.ejb.session.stateless_sp5.ObjectStubProxyImpl.invoke(ObjectStubProxyImpl.java:187)
 at $Proxy347.getCurrency(Unknown Source)
 at xxx.XXX.getCurrencyWrapper(XXXXX.java:24)
How can I set dependencies to get this running?
Thanks to all
 Volker

Hi,
Is it available in the interface you are using..
If the answer is yes.. you might have probably forgotten to deploy the EJBs ear file after making the changes..
Rebuild it.. and deploy the EJB s ear file again..
It will solve the problem.. If that also does not work,it might be a problem with the cache.. restart the server..
It should work now !
Regards
Bharathwaj

Java class calling ejb

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