[jira] Commented: (TAPESTRY-157) support for subclassing in DirectService

["Norbert Sándor (JIRA)" <ta...@jakarta.apache.org>]

    [ http://issues.apache.org/jira/browse/TAPESTRY-157?page=comments#action_12315442 ] 

Norbert Sándor commented on TAPESTRY-157:
-----------------------------------------

I've similar problem in Tapestry 4:
- static methods in EngineMessages should be public to be usable from custom services
- In case of DirectService I want both triggering and response rendering to happen in db transaction. To make it possible without copy-paste, direct.trigger(cycle); should be in a separate method.

Br,
Norbi

> support for subclassing in DirectService
> ----------------------------------------
>
>          Key: TAPESTRY-157
>          URL: http://issues.apache.org/jira/browse/TAPESTRY-157
>      Project: Tapestry
>         Type: Bug
>   Components: Framework
>     Versions: 3.0
>  Environment: Operating System: Other
> Platform: Other
>     Reporter: Norbert P.
>     Assignee: Tapestry Developer List

>
> I'd like to subclass DirectService by slightly modifying the behaviour of the 
> service() method but leaving the getLink() method untouched. I have the 
> following problems with this:
> - DirectService.STATEFUL_ON and DirectService.STATEFUL_OFF are private, so I 
> cannot copy-paste the code from the original service() method to my subclass
> - Of course it would be much better to prevent copy-paste. For example the 
> service() method should be cut into at least two separate methods: extracting 
> parameters and executing service related tasks. This is necessary to execute 
> the service without a RequestContext (for testing or internal invocation).
> - the above subclassing problem is true for all services
> All the above is irrelevant if default Tapestry services are not intended to be 
> (easily) subclassed (but I think they should be).
> Thanks,
> Norbi

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