BIND 10 #1608: implement ZoneFinder::Context::getAdditional() for in memory data source

[BIND 10 Development]

#1608: implement ZoneFinder::Context::getAdditional() for in memory data source
-------------------------------------+-------------------------------------
                   Reporter:         |                 Owner:
  jinmei                             |                Status:  new
                       Type:  task   |             Milestone:
                   Priority:  high   |  Sprint-20120320
                  Component:  data   |            Resolution:
  source                             |             Sensitive:  0
                   Keywords:         |           Sub-Project:  DNS
            Defect Severity:  N/A    |  Estimated Difficulty:  5
Feature Depending on Ticket:  auth   |           Total Hours:  0
  performance                        |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
-------------------------------------+-------------------------------------

Comment (by jinmei):

 Replying to [comment:2 vorner]:

 I'm going to pick up this task.  Before doing that, on this point:

 > I could think of a lazy implementation.

 Yeah, we could think about optimizing it further.  I've thought about
 these kinds of ideas a bit, but right now I'm inclined to stick to
 a naive but simple version.  Due to the footprint issue, the in-memory
 data source isn't realistically usable for larger zones anyway (and
 for smaller zones for which the current in-memory is usable in
 practice, the various overhead of this naive approach should also be
 marginal), so for now I'd complete the basic feature first in a
 simplest way.

-- 
Ticket URL: <http://bind10.isc.org/ticket/1608#comment:9>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development