[cdi-dev] [JBoss JIRA] Commented: (CDI-110) Allow injection of abstract classes (Service Handler)

[Dan Allen (JIRA)]

    [ https://issues.jboss.org/browse/CDI-110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12589533#comment-12589533 ] 

Dan Allen commented on CDI-110:
-------------------------------

A more apt title for this JIRA is:

"Provide support for binding an invocation handler to an interface or abstract class"

The purpose of this feature is to allow interfaces and abstract classes to be automatically implemented by an invocation handler to which all abstract method invocations are delegated. The invocation handler would get "bound" to the type using the same strategy as is used for interceptor binding.

Binding type:
{code:java}
@Target({ METHOD, TYPE })
@Retention(RetentionPolicy.RUNTIME)
@ServiceHandlerBindingType
public @interface EchoService {}
{code}

Invocation handler:
{code:java}
@ServiceHandlerBindingType
@EchoService
public class EchoServiceHandler {
    @AroundInvoke
    public Object invoke(InvocationContext ctx) {
        return ctx.getMethod().getName().toString();
    }
}
{code}

Usage:

{code:java}
@EchoService
public interface HelloWorld {
   String helloWorld();
}
{code}

> Allow injection of abstract classes (Service Handler)
> -----------------------------------------------------
>
>                 Key: CDI-110
>                 URL: https://issues.jboss.org/browse/CDI-110
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Inheritance and Specialization
>    Affects Versions: 1.1 (Proposed)
>            Reporter: George Gastaldi
>              Labels: cdi
>
> According to mojavelinux:
> {quote}
> <mojavelinux> service handler, interceptors and decorators are all complementary
> <mojavelinux> and cdi is missing the first...which we now realize
> {quote}
> CDI 1.1 should provide a way to inject abstract classes by specifying a ServiceHandler (Check http://docs.jboss.org/seam/3/solder/latest/reference/en-US/html/servicehandler.html)

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira