BIND 10 #2376: define LoaderContext class

[BIND 10 Development]

#2376: define LoaderContext class
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                   Reporter:         |                 Owner:  UnAssigned
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20121120
  medium                             |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  4
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
  scalable inmemory                  |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Changes (by vorner):

 * owner:  vorner => UnAssigned
 * status:  accepted => reviewing


Comment:

 Hello

 It should be ready for review. But I have two concerns about the class:
  * Since the operator() can be non-const and the getCallbacks is a const
    method, we need the ugly mutable keyword. Return a non-reference? Or
 make
    the method non-const?
  * This is another glue class that does nothing :-(. Not that I'd know
 what to
    do with it at this stage, but it makes the code gradually unreadable.

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Ticket URL: <http://bind10.isc.org/ticket/2376#comment:5>
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