Hi,
Actually, i don't have a big experience with EJB 2.x.
Which OpenEJB version are you using?
Did you have a look to examples?
As far as i know, there are EJB 2.x examples.
Jean-Louis
SK Leung wrote:
>
> I have created two session beans.
> One is ejbuser.HelloEJB.java
> package ejbuser;
>
> import java.rmi.RemoteException;
> import javax.ejb.SessionBean;
> import javax.ejb.SessionContext;
>
> public class HelloEJB implements SessionBean {
> public HelloEJB() {}
> public void ejbCreate() {}
> public void ejbRemove() {}
> public void ejbActivate() {}
> public void ejbPassivate() {}
> public void setSessionContext(SessionContext sc) {}
>
> public String helloWorld() throws RemoteException {
> String v = System.getProperty("java.vm.name");
> return "Hello client, your javavm Name is " + v + ".";
> }
>
> }
>
> The other one is ejbuser.OrderSBEJB.java
> package ejbuser;
>
> import java.rmi.RemoteException;
> import javax.rmi.PortableRemoteObject;
> import javax.ejb.SessionBean;
> import javax.ejb.SessionContext;
> import javax.naming.InitialContext;
> import javax.servlet.*;
> import javax.servlet.http.*;
> import java.util.Collection;
>
> public class OrderSBEJB implements SessionBean {
> public OrderSBEJB() {}
> public void ejbCreate() {}
> public void ejbRemove() {}
> public void ejbActivate() {}
> public void ejbPassivate() {}
> public void setSessionContext(SessionContext sc) {}
>
> public String showGreeting() throws RemoteException {
> return "This is the greeting message.";
> }
>
> public String helloWorld() throws RemoteException {
> String sResult = null;
> try {
> InitialContext icHello = new InitialContext();
> Object objHello = icHello.lookup("Hello");
> HelloHome helloHome =
> (HelloHome)PortableRemoteObject.narrow(objHello,
> HelloHome.class);
> Hello hello = helloHome.create();
> sResult = hello.helloWorld();
> } catch(Exception e) {
> e.printStackTrace();
> } finally {
> }
> return sResult;
> }
>
> }
>
> I can call these two session beans from the servlet as below.
> InitialContext icHello = new InitialContext();
> Object objHello = icHello.lookup("java:comp/env/ejb/ejbuser/HelloHome");
> HelloHome helloHome = (HelloHome)PortableRemoteObject.narrow(objHello,
> HelloHome.class);
> Hello hello = helloHome.create();
> System.out.println(hello.helloWorld());
> InitialContext icOrderSB = new InitialContext();
> Object objOrderSB =
> icOrderSB.lookup("java:comp/env/ejb/ejbuser/OrderSBHome");
> OrderSBHome orderSBHome =
> (OrderSBHome)PortableRemoteObject.narrow(objOrderSB, OrderSBHome.class);
> OrderSB orderSB = orderSBHome.create();
> System.out.println(orderSB.showGreeting());
>
> But when I call
> System.out.println(orderSB.helloWorld());
> There is the error message.
> 1) Name "Hello" is not bound in this context.
>
> The ejb-jar.xml file is:
> <?xml version="1.0" encoding="UTF-8"?>
> <ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee"; version="2.1"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
> http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd";>
> <enterprise-beans>
> <session>
> <display-name>OrderSB</display-name>
> <ejb-name>OrderSB</ejb-name>
> <home>ejbuser.OrderSBHome</home>
> <remote>ejbuser.OrderSB</remote>
> <ejb-class>ejbuser.OrderSBEJB</ejb-class>
> <session-type>Stateless</session-type>
> <transaction-type>Container</transaction-type>
> </session>
> <session>
> <display-name>Hello</display-name>
> <ejb-name>Hello</ejb-name>
> <home>ejbuser.HelloHome</home>
> <remote>ejbuser.Hello</remote>
> <ejb-class>ejbuser.HelloEJB</ejb-class>
> <session-type>Stateless</session-type>
> </session>
> </enterprise-beans>
> </ejb-jar>
>
> There is something wrong when calling session bean HelloEJB from method
> helloWorld() in OrderSBEJB. What is the correct way in looking up HelloEJB
> from inside OrderSBEJB? Please advise, thanks.
> SK
>
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