Merge branch 'ee-rc/update-flipper' into 'master'

[EE] Update flipper to 0.11.0 and take advantage of the new features

See merge request gitlab-org/gitlab-ee!3775

Gemfile

@@ -421,8 +421,9 @@ gem 'gitaly-proto', '~> 0.59.0', require: 'gitaly'
 gem 'toml-rb', '~> 0.3.15', require: false
 
 # Feature toggles
-gem 'flipper', '~> 0.10.2'
-gem 'flipper-active_record', '~> 0.10.2'
+gem 'flipper', '~> 0.11.0'
+gem 'flipper-active_record', '~> 0.11.0'
+gem 'flipper-active_support_cache_store', '~> 0.11.0'
 
 # Structured logging
 gem 'lograge', '~> 0.5'

Gemfile.lock

@@ -239,10 +239,13 @@ GEM
       path_expander (~> 1.0)
       ruby_parser (~> 3.0)
       sexp_processor (~> 4.0)
-    flipper (0.10.2)
-    flipper-active_record (0.10.2)
+    flipper (0.11.0)
+    flipper-active_record (0.11.0)
       activerecord (>= 3.2, < 6)
-      flipper (~> 0.10.2)
+      flipper (~> 0.11.0)
+    flipper-active_support_cache_store (0.11.0)
+      activesupport (>= 3.2, < 6)
+      flipper (~> 0.11.0)
     flowdock (0.7.1)
       httparty (~> 0.7)
       multi_json
@@ -1056,8 +1059,9 @@ DEPENDENCIES
   faraday_middleware-aws-signers-v4
   ffaker (~> 2.4)
   flay (~> 2.8.0)
-  flipper (~> 0.10.2)
-  flipper-active_record (~> 0.10.2)
+  flipper (~> 0.11.0)
+  flipper-active_record (~> 0.11.0)
+  flipper-active_support_cache_store (~> 0.11.0)
   fog-aliyun (~> 0.2.0)
   fog-aws (~> 1.4)
   fog-core (~> 1.44)

config/initializers/flipper.rb

-require 'flipper/middleware/memoizer'
+require 'flipper/adapters/active_record'
+require 'flipper/adapters/active_support_cache_store'
 
-unless Rails.env.test?
-  Rails.application.config.middleware.use Flipper::Middleware::Memoizer,
-    lambda { Feature.flipper }
+Flipper.configure do |config|
+  config.default do
+    adapter = Flipper::Adapters::ActiveRecord.new(
+      feature_class: Feature::FlipperFeature, gate_class: Feature::FlipperGate)
+    cached_adapter = Flipper::Adapters::ActiveSupportCacheStore.new(
+      adapter,
+      Rails.cache,
+      expires_in: 10.seconds)
+
+    Flipper.new(cached_adapter)
+  end
+end
 
-  Feature.register_feature_groups
+Feature.register_feature_groups
+
+unless Rails.env.test?
+  require 'flipper/middleware/memoizer'
+  Rails.application.config.middleware.use Flipper::Middleware::Memoizer
 end

lib/feature.rb

-require 'flipper/adapters/active_record'
-
 class Feature
   # Classes to override flipper table names
   class FlipperFeature < Flipper::Adapters::ActiveRecord::Feature
@@ -62,12 +60,7 @@ class Feature
     end
 
     def flipper
-      @flipper ||= begin
-        adapter = Flipper::Adapters::ActiveRecord.new(
-          feature_class: FlipperFeature, gate_class: FlipperGate)
-
-        Flipper.new(adapter)
-      end
+      @flipper ||= Flipper.instance
     end
 
     # This method is called from config/initializers/flipper.rb and can be used