Component.getInstance(...) problem

[sherkan777]

Hi,
I try to get APLICATION scope component instance from conversation scope another component by:

Component.getInstance

Is this possible?

Here is my STSB

@Stateful
@Scope(ScopeType.APPLICATION)
@Name("sguniNewsAction")

and conversation bean

SGUniNewsAction action = (SGUniNewsAction)Component.getInstance(SGUniNewsAction.class, false);
action.loadHotNews();

after that I get

Class cast exception error

[swd847]

if SGUniNewsAction is the bean class, you need to use the local interface in your code. Post the bean src and I will give an example if you are still hacing trouble.

[sherkan777]

Jep, this is STSB

My bean which I want to get:

@Stateful
@Scope(ScopeType.APPLICATION)
@Name("sguniNewsAction")
public class SGUniNewsAction extends GameSystem implements SGUniNewsConsole {

.....

        @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
        public void loadHotNews() {...}
}
 

My bean from which i want to get SGUniNewsAction:

@Stateful
@Scope(ScopeType.CONVERSATION)
@Restrict("#{s:hasRole('moderator')}") 
@Name("newsAction")
public class NewsAction extends PersonSystem implements NewsConsole {
.....


@End
@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
public void addNews() { 
....
SGUniNewsAction action = (SGUniNewsAction)Component.getInstance(SGUniNewsAction.class, false);
action.loadHotNews();
}

[swd847]

This is what you want:

SGUniNewsConsole action = (SGUniNewsConsole)Component.getInstance(SGUniNewsAction.class, false);

With ejbs you always reference them through the Local or Remote interface, this is because the object that is returned is not an SGUniNewsAction, but a proxy that implements SGUniNewsConsole and wraps a SGUniNewsAction instance, with several layers of interceptors in between (this is how it provides all those neat things such as dependency injection and container managed transactions).

[sherkan777]

hmmmm, so...how can I get it if this is proxy?

Can u show me pls, a small example?

[swd847]

You call it like this:

SGUniNewsConsole action = (SGUniNewsConsole)Component.getInstance("sguniNewsAction", false);

[sherkan777]

Thanks Stuart, you got beer! :)