BIND 10 #2956: DHCP-DDNS: Create server controller class

[BIND 10 Development]

#2956: DHCP-DDNS: Create server controller class
-------------------------------------+-------------------------------------
            Reporter:  stephen       |                        Owner:  tmark
                Type:  enhancement   |                       Status:
            Priority:  medium        |  assigned
           Component:  dhcp          |                    Milestone:
            Keywords:                |  Sprint-DHCP-20130606
           Sensitive:  0             |                   Resolution:
         Sub-Project:  DHCP          |                 CVSS Scoring:
Estimated Difficulty:  0             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by tmark):

 I've created the initial, implementation DHCP-DDNS service controller
 class, D2Controller. In the original design this was referred to as
 !CtrlDhcpDdnsSrv.
 It plays the essentially the same role as designed: It is the
 "controlling"
 object which creates the runtime environment for and manages the lifecycle
 of the application processr,D2Process (fromerly known as !DhcpDdnsSrv).

 Unlike the DHCP server top level classes where the controller derives from
 the server,  D2Controller derives from a new abstract class,
 DControllerBase.  This abstraction provides all of the services necessary
 to manage an application process class derived from DProcess.  These
 services include:
    Command line argument handling
    Process instantiation and initialization
    Support for stand-alone execution
    Support for integrated operation as a BIND10 module (session management
 and
    event handling)
    Process event loop invocation and shutdown

 The implementation is sufficient to run as a BIND10 module and supports
 shutdown command.

 New files added:
    d_controller.h
    d_controller.cc
    d2_controller.h
    d2_controller.cc

    tests/d_test_stubs.h
    tests/d_test_stubs.cc

    tests/d_controller_unittests.cc
    tests/d2_controller_unittests.cc

 The following class diagram illustrates the lay of the land (this will be
 incorporated into
 design/implementation documentation)

 [[Image(d2classes_diagram.svg)]]

 Recommended !ChangeLog entry:

 6xx.    [func]      tmark
     Created the initial implementation of DHCP-DDNS service controller
 class,
     D2Controller, and the abstract class from which it
 derives,DControllerBase.        D2Controller manages the lifecycle and
 BIND10 integration of the DHCP-DDNS
     application process, D2Process.

     (Trac #2956, git TBD)

-- 
Ticket URL: <http://bind10.isc.org/ticket/2956#comment:3>
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