Hello Ken,
thanks a lot for your help, that was the solution!
Martin
Kenneth Saks schrieb:
>
> On Jan 5, 2009, at 9:43 AM, Dr. Martin H. Ludwig wrote:
>
>> Hello,
>>
>> first: Sorry for crossposting to the users- and the ejb-list, but I was
>> not shure about the correct list because there is very low traffic on
>> the ejb-list.
>>
>> I have the following problem:
>>
>> I made two beans for glassfish: one with annotations and only two
>> classes (Bean2 and Bean2Impl) and the other one with a
>> deployment-descriptor and three classes (SimpleBeanHome, SimpleBean and
>> SimpleBeanImpl). I deployed these classes in two different EAR-files.
>>
>> I made a client first talking to the EJB3-bean and then to the
>> EJB2-bean. The first connection works well, the second connection gives
>> to following exception:
>>
>> java.lang.ClassCastException:
>> com.webage.ejbs._SimpleBeanHome_DynamicStub cannot be cast to
>> com.webage.ejbs.SimpleBean
>> at com.webage.client.TestClient.runTest(TestClient.java:25)
>> at com.webage.client.TestClient.main(TestClient.java:33)
>>
>> Has anyone an idea for a solution or an example?
>
> Hi Martin,
>
> When using the EJB 2.x client view, the object returned from the lookup
> is a reference to the Home interface, not the component interface.
> The portable way to code this is :
>
> Object o = ctx.lookup(...);
> SimpleBeanHome home = (SimpleBeanHome)
> PortableRemoteObject.narrow(o, SimpleBeanHome.class);
> SimpleBean bean = home.create();
> ...
>
> A direct cast to SimpleBeanHome will work in our implementation but it's
> not guaranteed to be portable.
>
> --ken
>
>>
>>
>> Thank you for your help!
>>
>> Martin
>>
>>
>>
>> Here the content of the files:
>>
>> ejb-jar.xml:
>> ---
>> <?xml version="1.0" encoding="ASCII"?>
>> <ejb-jar xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>> xmlns="http://java.sun.com/xml/ns/javaee"
>> xmlns:ejb="http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd"
>> xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
>> http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd" version="3.0">
>> <display-name>GFT1EJB</display-name>
>>
>> <enterprise-beans>
>> <session>
>> <description>SimpleBean</description>
>> <display-name>SimpleBean</display-name>
>> <ejb-name>SimpleBean</ejb-name>
>> <home>com.webage.ejbs.SimpleBeanHome</home>
>> <remote>com.webage.ejbs.SimpleBean</remote>
>> <ejb-class>com.webage.ejbs.SimpleBeanImpl</ejb-class>
>> <session-type>Stateless</session-type>
>> <transaction-type>Container</transaction-type>
>> </session>
>> </enterprise-beans>
>>
>> </ejb-jar>
>> ---
>>
>> sun-ejb-jar.xml:
>> ---
>> <?xml version="1.0" encoding="UTF-8"?>
>> <!DOCTYPE sun-ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Application
>> Server 9.0 EJB 3.0//EN"
>> "http://www.sun.com/software/appserver/dtds/sun-ejb-jar_3_0-0.dtd">
>> <sun-ejb-jar>
>> <enterprise-beans>
>> <ejb>
>> <ejb-name>SimpleBean</ejb-name>
>> <jndi-name>ejb/SimpleBean</jndi-name>
>> </ejb>
>> </enterprise-beans>
>>
>> </sun-ejb-jar>
>> ---
>>
>> SimpleBean.java:
>> ---
>> package com.webage.ejbs;
>> import java.rmi.RemoteException;
>>
>> import javax.ejb.EJBObject;
>>
>> public interface SimpleBean extends EJBObject {
>>
>> public String sayHello(String name) throws RemoteException;
>>
>> }
>> ---
>>
>> SimpleBeanHome.java:
>> ---
>> package com.webage.ejbs;
>>
>> import java.rmi.RemoteException;
>>
>> import javax.ejb.CreateException;
>> import javax.ejb.EJBHome;
>>
>> public interface SimpleBeanHome extends EJBHome {
>>
>> public static final String JNDI_NAME = "SimpleBeanHome";
>>
>> SimpleBean create() throws CreateException, RemoteException;
>> }
>> ---
>>
>> SimpleBeanImpl.java:
>> ---
>> package com.webage.ejbs;
>>
>> import java.rmi.RemoteException;
>>
>> import javax.ejb.*;
>>
>> public class SimpleBeanImpl implements SessionBean {
>>
>> private static final long serialVersionUID = -5166616433705338964L;
>>
>> protected SessionContext ejbContext;
>>
>> public String sayHello(String name){
>> return "Guten Tag 2 " + name + "!";
>> }
>>
>> public void ejbActivate() throws EJBException, RemoteException {}
>>
>> public void ejbPassivate() throws EJBException, RemoteException {}
>>
>> public void ejbRemove() throws EJBException, RemoteException {}
>>
>> public void setSessionContext(SessionContext ctx) throws
>> EJBException, RemoteException {
>> this.ejbContext = ctx;
>> }
>>
>> }
>> ---
>>
>> and TestClient.java:
>> ---
>> package com.webage.client;
>>
>> import javax.naming.*;
>> import com.meins.ejbs.Bean2;
>> import com.webage.ejbs.SimpleBean;
>>
>> public class TestClient {
>>
>> public void runTest() throws Exception {
>> InitialContext ctx = new InitialContext();
>>
>> // the ejb3-bean
>> Bean2 bean2 = (Bean2) ctx.lookup("ejb/Bean2JNDI");
>> String result2 = bean2.sayHello("Billy Bob");
>> System.out.println(result2);
>>
>> // the ejb2-bean
>> SimpleBean bean = (SimpleBean) ctx.lookup("ejb/SimpleBean");
>> String result = bean.sayHello("Bully Bib");
>> System.out.println(result);
>> }
>>
>> public static void main(String[] args) {
>> try {
>> TestClient cli = new TestClient();
>> cli.runTest();
>>
>> } catch (Exception e) {
>> e.printStackTrace();
>> }
>> }
>> }
>> ---
>>
>>
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