> On July 9, 2015, 10:24 p.m., Marco Massenzio wrote:
> > src/master/http.cpp, lines 311-316
> > <https://reviews.apache.org/r/36318/diff/2/?file=1003768#file1003768line311>
> >
> >     unless you know for a fact that none of this will be `None()` you 
> > *must* check, or this will crash Mesos: hence
> >     ```
> >     if (contentType.isNone()) {
> >       return BadRequest("Content-Type header MUST be specified");
> >     } else if (contentType.get() == Constants.APPLICATION_JSON) {
> >       return MediaNotSupported("We do not support JSON request/response 
> > content yet");
> >     } else {
> >       ...
> >     }
> >     ```
> 
> Isabel Jimenez wrote:
>     Hi @marco I commented on previous review that this valdiations will be 
> handle in the split of the /call patch. That's why it's missing here. It'll 
> be added with the rebase.

I'm not entirely sure I understand (but I don't really need to): please then 
add either a TODO to check the checks (so to speak) or an inline comment 
stating the invariant - but, if so, I would like to see a CHECK_SOME() to make 
it explicit.
Otherwise, someone else (yourself in 3 months!) may not know/remember about 
this and may add redundant checks and/or or remove the others (and leave the 
condition unchecked).


- Marco


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On July 9, 2015, 6:49 p.m., Anand Mazumdar wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/36318/
> -----------------------------------------------------------
> 
> (Updated July 9, 2015, 6:49 p.m.)
> 
> 
> Review request for mesos, Ben Mahler, Isabel Jimenez, Marco Massenzio, and 
> Vinod Kone.
> 
> 
> Bugs: MESOS-2294
>     https://issues.apache.org/jira/browse/MESOS-2294
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> This change lays the ground-work for the master's ability to stream events 
> back to the client. This review turned out a bit too large for my own liking 
> but in a nutshell, it just takes a subscribe request and puts a subscribed 
> event back on the stream.
> 
> Explanation of changes:
> - Made a generic FrameworkDriver interface that the master now uses to 
> communicate with the frameworks instead of just invoking 
> send(framework->pid,...)
> - Framework's can be of 2 types now http, libprocess.
> - Made a adapter class that takes the messages from master, transforms them 
> to events that the http framework driver can then understand.
> - This still uses hard-coded http related constants. They can go away when 
> Isabel submits her validation change (36217)
> - This change prefers use of using trailing under-scores as member variables 
> from the style guide.
> 
> 
> Diffs
> -----
> 
>   src/common/protobuf_utils.hpp afe5a85d3f58eaabb16807253c5fcc07cabcf8e8 
>   src/common/protobuf_utils.cpp 8a51daa45db312ca4608dda3fd99df2c3f9962f1 
>   src/master/http.cpp 23a6d4bd2f60cb4a4ad463aea7cc032941578bdc 
>   src/master/master.hpp 2343a684402972a8c336c0dcdde0bfaffabe7cec 
>   src/master/master.cpp 35e147574842e3c6ae819541a6c03bf16a375294 
>   src/tests/http_api_tests.cpp 64bbeb6699171e85a5be293919ad9f32ded0ebac 
> 
> Diff: https://reviews.apache.org/r/36318/diff/
> 
> 
> Testing
> -------
> 
> make check + a simple test for subscribe call received a subscribed event 
> back on the stream.
> 
> 
> Thanks,
> 
> Anand Mazumdar
> 
>

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