Third-party EJBs as seam components

[patrickr]

Hi there,

Consider an EAR file containing a seam application and a third-party ejb-jar. Now, can I just use components.xml to give these EJBs a name and seam scope and then use them as usual seam components?

And what happens if I deploy the ejb-jar by itself? Would this work:

@Name("myRemoteEJB")
public class RemoteEJBManager
{
 private RemoteInterface ejb;

 @Create
 public void create() throws NamingException {
 InitialContext ic = new InitialContext();
 RemoteInterface ejb = (RemoteInterface)
 ic.lookup(RemoteInterface.class.getName());
 }

 @Unwrap
 public RemoteInterface getEjb() {
 return ejb;
 }

}

Thank your very much!

[pmuir]

As long as Seam can look up the bean in jndi then it should be fine. so use jndiName.

[pmuir]

The manager pattern you mention should work as well.

[patrickr]

Thanks for your answers, Pete! And sorry for responding so late. However, I can't get the jndi-name lookup working. Since I didn't find any information in the docs, could you please tell me what exactly jndi-name expects?

I supposed that this would work.

<core:init jndi-pattern="wct-example/#{ejbName}/local" debug="true"/>

<component name="shoppingCart" jndi-name="wct-example/ShoppingCartBean/local" scope="session" auto-create="true" />

But when I use this for injection, shoppingCart is always null.

Also, while I see

19:22:35,199 INFO [JmxKernelAbstraction] installing MBean: jboss.j2ee:ear=wct-example.ear,jar=wct-commerce.jar,name=ShoppingCartBean,service=EJB3 with dependencies:
19:22:35,199 INFO [JmxKernelAbstraction] jboss.j2ee:ear=wct-example.ear,jar=wct-commerce.jar,name=OrderManagerBean,service=EJB3
19:22:35,349 INFO [EJBContainer] STARTED EJB: de.wct.commerce.service.ShoppingCartBean ejbName: ShoppingCartBean

...I don't see a seam component log message for shoppingCart.

[patrickr]

Doing it programmatically works:

@Name("shoppingCart")
@Scope(ScopeType.SESSION)
public class ShoppingCartManager
{
 private ShoppingCart shoppingCart;

 @Create
 public void create() throws NamingException
 {
 InitialContext ic = new InitialContext();
 //shoppingCart = (ShoppingCart) ic.lookup(ShoppingCart.class.getName());
 shoppingCart = (ShoppingCart) ic.lookup("wct-example/ShoppingCartBean/local");
 }

 @Unwrap
 public ShoppingCart getShoppingCart() {
 return shoppingCart;
 }
}

But why not with the components.xml? Is this a bug?

[pmuir]

You need to specify the class as well.