From: Sebastian Harl <sh@tokkee.org>
Date: Tue, 6 Oct 2015 19:47:34 +0000 (+0200)
Subject: Build a more generic/powerful query API which writes to a store-writer.
X-Git-Tag: sysdb-0.8.0~14
X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=commitdiff_plain;h=9a96acd759c31211aa512e174339a9c178c4eb83;hp=9a96acd759c31211aa512e174339a9c178c4eb83

Build a more generic/powerful query API which writes to a store-writer.

Instead of letting the query implementation write JSON directly, let them emit
objects to a store-writer. This allows for more powerful and centralized
post-processing of the data and avoids code-duplication by moving all logic of
how to write out the data to the core. Also, this had a couple of nice side
effects and allowed for further simplication:

 - The TIMESERIES command is now handled by the front-end (based on a FETCH of
   the respective metric data); query plugin no longer have to implement this.

 - All protocol specific information is now handled by the frontend; query
   plugins no longer have to handle this (response-type).

 - Further separation of the memory-store and generic store code.
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