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/trunk/main/stasis_channels.c
<https://reviewboard.asterisk.org/r/3811/#comment23048>

    I'm not sure why these changes (removal of the .to_ami callback) were 
necessary.
    
    Generally, I prefer the .to_ami callbacks to explicit subscription to 
message types and construction of messages in the various manager_* modules:
    
    (1) Obtaining the messages in the appropriate modules is done by simply 
forwarding the topics to the manager topic. That substantially reduces the 
boilerplate code required.
    
    (2) Co-locating the generation of formatting of messages makes it very easy 
to update all consumers of a message when a new field is added, helping keep 
the code/events similar for all consumers of that message.
    
    Generally, I would much prefer these to be kept, and to have the other 
channel related message have .to_ami callbacks implemented. If anything, the 
res_manager_channels module should be very small: it should set up a forwarding 
relationship between the channel topics and the manager topic and be done.


- Matt Jordan


On July 16, 2014, 8:14 p.m., Corey Farrell wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/3811/
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> 
> (Updated July 16, 2014, 8:14 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> This change moves main/manager_*.c to loadable modules, allowing those events 
> to be disabled by not loading the modules.  This can be accomplished by 
> eventfilter, but eventfilter has a couple issues.  It actually adds more 
> overhead to asterisk since the outbound events must be parsed for each AMI 
> user.  Additionally it causes skips in SequenceNumber, preventing use of that 
> tag to determine if any events were missed during a reconnect.
> 
> Besides converting from built-in units to modules, changes are made to 
> VarSet, ChannelTalkingStart and ChannelTalkingStop.  They no longer use 
> .to_ami callbacks, but instead subscribe to the stasis events like the rest 
> of the res_manager_channels events.  A couple functions were also moved from 
> manager_bridging.c and manager_channels.c to manager.c since they are still 
> needed even if these modules are noload'ed.
> 
> AST_MODULE_INFO_STANDARD for all modules will be updated once r3802 is 
> committed.  This or r3812 will need to be updated depending on which is 
> committed first.
> 
> 
> Diffs
> -----
> 
>   /trunk/main/stasis_channels.c 418738 
>   /trunk/main/manager_system.c HEAD 
>   /trunk/main/manager_system.c 418738 
>   /trunk/main/manager_mwi.c HEAD 
>   /trunk/main/manager_mwi.c 418738 
>   /trunk/main/manager_endpoints.c HEAD 
>   /trunk/main/manager_endpoints.c 418738 
>   /trunk/main/manager_channels.c HEAD 
>   /trunk/main/manager_channels.c 418738 
>   /trunk/main/manager_bridges.c HEAD 
>   /trunk/main/manager_bridges.c 418738 
>   /trunk/main/manager.c 418738 
>   /trunk/include/asterisk/manager.h 418738 
> 
> Diff: https://reviewboard.asterisk.org/r/3811/diff/
> 
> 
> Testing
> -------
> 
> Ran some testsuite's to verify some of the events were still being sent to 
> AMI:
> tests/manager/originate
> tests/apps/channel_redirect
> tests/bridge/connected_line_update
> tests/feature_call_pickup
> tests/apps/dial/dial_answer
> tests/apps/chanspy/chanspy_barge
> tests/funcs/func_push
> 
> This did not provide complete coverage for all effected events, but does 
> verify many events from res_manager_channels.c.  Events from other files were 
> not tested, though res_manager_channels.c was the most likely to cause 
> problems.
> 
> 
> Thanks,
> 
> Corey Farrell
> 
>

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