By Gábor Hojtsy on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.0.x
Introduced in version: 
8.0.0
Issue links: 
https://www.drupal.org/node/2524082
Description: 

ConfigBase now implements RefinableCacheableDependencyInterface (instead of the less specific CacheableDependencyInterface) and uses RefinableCacheableDependencyTrait. This allows for classes extending from ConfigBase (most importantly Config) to support adding cache contexts, cache tags and merging a cache max age.

Merging configuration overrides to configuration objects is done runtime by ConfigFactory. To support propagating cache metadata from configuration overrides to Config objects, ConfigFactoryOverrideInterface got these three new public methods: getCacheContexts($name), getCacheTags($name), getCacheMaxAge($name).

ConfigFactory now uses these two to retrieve all cache related metadata from overrides and propagate it to the Config objects created.

Configuration cache metadata is further propagated to configuration entities in ConfigEntityStorage::doLoadMultiple() and upwards to blocks for example in BlockViewBuilder::viewMultiple() thus contributing to having an exact list of what the response depended on for caching accuracy.

Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done