[ http://issues.apache.org/jira/browse/BEEHIVE-365?page=history ]
Kenneth Tam updated BEEHIVE-365:
--------------------------------
Assign To: Kyle Marvin
Fix Version: V1
(was: V1Beta)
> Enable optional declarative contextual services
> -----------------------------------------------
>
> Key: BEEHIVE-365
> URL: http://issues.apache.org/jira/browse/BEEHIVE-365
> Project: Beehive
> Type: Improvement
> Components: Controls
> Versions: V1Beta
> Reporter: Kyle Marvin
> Assignee: Kyle Marvin
> Priority: Minor
> Fix For: V1
>
> It would be nice to be able to declaratively specify a contextual service
> whose presence is optional. Currently, if a service isn't available a
> ControlException will be thrown during impl initialization.
> Having a 'soft failure' mode where no exception is thrown but the service ref
> is left null would allow:
> - user code to generate a more specific and useful error message in an
> onCreate handler if a needed service is unavailable.
> - allow user (or test) code to be written that behaves conditionally based
> upon whether certain contextual services are/are not available
> The default value of 'required' would be true, meaning that if the attribute
> was not present on an @Context declaration, the behavior would be identical
> to what it is today (bean instantiation will fail).
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