BIND 10 #292: Asynchronous support for python config ccsession library

[BIND 10 Development]

#292: Asynchronous support for python config ccsession library
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  Reporter:  fujiwara       |            Owner:  jelte
      Type:  enhancement    |           Status:  new  
  Priority:  minor          |        Milestone:       
 Component:  configuration  |         Keywords:       
 Sensitive:  0              |   Estimatedhours:  0    
     Hours:  0              |         Billable:  1    
Totalhours:  0              |         Internal:  0    
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 Python config library (lib/python/isc/config/ccsession.py)'s check_command
 method blocks and receives data from session.
 But a session can be shared with config and another group data.

 I propose two enhancements.
 One is non_blocking option for check_command() method.
 The other is new check_command_without_recvmsg() method.
 I made a patch at experiments/fujiwara-stats branch revision 2218.

 The latter enables that we can share a session with config and another
 data, and if the received message is for config module, then call
 check_command_without_recvmsg() with received message.

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Ticket URL: <http://bind10.isc.org/ticket/292>
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