BIND 10 #1382: datasrouce interface for signaling capabilities

[BIND 10 Development]

#1382: datasrouce interface for signaling capabilities
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            Reporter:  jelte         |                        Owner:
                Type:  enhancement   |                       Status:  new
            Priority:  major         |                    Milestone:  New
           Component:  data source   |  Tasks
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 We do not expect every data source implementation to support every type of
 action; some will be 'read-only', and hence will not support things like
 updating etc. We can (and do) already throw NotImplemented exceptions if
 these functions are called, but we should really not call them in the
 first place if the implementation is not able to do it anyway.

 So the proposal is to add a method that returns what the datasource can
 and cannot do (iteration, updating, journaling, perhaps more) so any
 callers can more cleanly handle cases where these are not supported.

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Ticket URL: <http://bind10.isc.org/ticket/1382>
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