[users at bb.net] Grid and Transposed Grid Views in buildbot nine?

[Pierre Tardy]

On Sat, Apr 15, 2017 at 12:43 AM Craig Rodrigues <rodrigc at crodrigues.org>
wrote:

> Hi,
>
> Thanks for working on this.  The console view looks a lot better, and
> includes more useful information about the
> existing builds.  Maybe this can effectively replace the old grid and
> t-grid views.
>
> For the waterfall view, you might want to get more opinions.  I still
> think that the presentation
> of information in the buildbot 8 waterfall view is better than 9.
> However, I don't feel strongly
> about this one, and others may have a different opinion.
>

I agree on waterfall that it also needs some work.
Eight's waterfall is a very clever design from Warner, our first
maintainer. It is tightly coupled with the status API, which has been
designed for waterfall.
There is a complex python generator based design which allow to build the
waterfall progressively, from top to bottom.
Eight's waterfall and status are tightly coupled, this is the reason why we
can't really reuse eight's waterfal code, even if we'd wrote a server side
plugin.

Nine REST API is on the contrary more generic, model and update oriented.
It is KISS, decoupled, scalable, and much easier to test and maintain.
Eight's waterfall display the whole db in one view. changes, builds, steps,
logs. So in order to implement it, you need to download the whole data.

I doubt we can really do it with the current REST api, it would be too
slow. This is why it currently only displays builds, but it's not that much
useful.
I guess we would need a new dashboard centric REST api endpoint which
allows to download all the data needed in one request.

Regards,
Pierre
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