> On Oct. 12, 2015, 7:52 p.m., Guangya Liu wrote:
> > src/slave/slave.cpp, line 394
> > <https://reviews.apache.org/r/38564/diff/4/?file=1096923#file1096923line394>
> >
> >     I have one question for this after second review: I see that in 
> > slave.cpp, most APIs are calling HookManager::hooksAvailable() to check if 
> > there are hook managers. The problem is that if I have two hooks hookA and 
> > hookB, then the HookManager::hooksAvailable() will return True but the call 
> > in this code block is calling hookC which will be failed.
> >     
> >     Do we need to enhance HookManager::hooksAvailable() by adding a 
> > parameter to check the availability for a specified hook manager?

It is a best-effort short circuit: we know for sure that there won't be 
anything to call if no hooks have been supplied. The hookC in your example will 
have a default implementation and be a noop if not supplied by the user.

Does this make sense, or did you think of something else?
If so, would you mind if we drop the issue here?


- Niklas


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On Oct. 12, 2015, 6:39 p.m., Felix Abecassis wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/38564/
> -----------------------------------------------------------
> 
> (Updated Oct. 12, 2015, 6:39 p.m.)
> 
> 
> Review request for mesos, Connor Doyle and Niklas Nielsen.
> 
> 
> Bugs: MESOS-3366
>     https://issues.apache.org/jira/browse/MESOS-3366
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Add a new callback enabling custom attribute discovery logic
> 
> 
> Diffs
> -----
> 
>   include/mesos/hook.hpp 0c1042a 
>   src/examples/test_hook_module.cpp cd7c184 
>   src/hook/manager.hpp 3af1ff8 
>   src/hook/manager.cpp 108bd46 
>   src/slave/slave.cpp 01c5e42 
>   src/tests/hook_tests.cpp b35ce72 
> 
> Diff: https://reviews.apache.org/r/38564/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Felix Abecassis
> 
>

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