On Wed, Oct 17, 2018 at 3:17 PM Kenneth Knowles <k...@apache.org> wrote:

> On Wed, Oct 17, 2018 at 3:12 AM Maximilian Michels <m...@apache.org> wrote:
>
>> A dry-run feature would be useful, i.e. the user can run an inspection
>> on the pipeline to see if it contains any features which are not
>> supported by the Runner.
>>
>
> This seems extremely useful independent of an annotation processor (which
> also seems useful), and pretty easy to get done quickly.
>
>>
+1, this would be very useful. (It could also be useful for cheaper testing
of the dataflow, or other non-local, runners.)


> On 17.10.18 00:03, Rui Wang wrote:
>> > Sounds like a good idea.
>> >
>> > Sounds like while coding, user gets a list to show if a feature is
>> > supported on different runners. User can check the list for the answer.
>> > Is my understanding correct? Will this approach become slow as number
>> of
>> > runner grows? (it's just a question as I am not familiar the
>> performance
>> > of combination of a long list, annotation and IDE)
>> >
>> >
>> > -Rui
>> >
>> > On Sat, Oct 13, 2018 at 11:56 PM Reuven Lax <re...@google.com
>> > <mailto:re...@google.com>> wrote:
>> >
>> >     Sounds like a good idea. I don't think it will work for all
>> >     capabilities (e.g. some of them such as "exactly once" apply to all
>> >     of the API surface), but useful for the ones that we can capture.
>> >
>> >     On Thu, Oct 4, 2018 at 2:43 AM Etienne Chauchot
>> >     <echauc...@apache.org <mailto:echauc...@apache.org>> wrote:
>> >
>> >         Hi guys,
>> >         As part of our user experience improvement to attract new Beam
>> >         users, I would like to suggest something:
>> >
>> >         Today we only have the capability matrix to inform users about
>> >         features support among runners. But, they might discover only
>> >         when the pipeline runs, when they receive an exception, that a
>> >         given feature is not supported by the targeted runner.
>> >         I would like to suggest to translate the capability matrix into
>> >         the API with annotations for example, so that, while coding, the
>> >         user could know that, for now, a given feature is not supported
>> >         on the runner he targets.
>> >
>> >         I know that the runner is only specified at pipeline runtime,
>> >         and that adding code would be a leak of runner implementation
>> >         and against portability. So it could be just informative
>> >         annotations like @Experimental for example with no annotation
>> >         processor.
>> >
>> >         WDYT?
>> >
>> >         Etienne
>> >
>>
>

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