107 lines
3.2 KiB
Ruby
107 lines
3.2 KiB
Ruby
require 'flipper/adapters/active_record'
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require 'flipper/adapters/active_support_cache_store'
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class Feature
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# Classes to override flipper table names
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class FlipperFeature < Flipper::Adapters::ActiveRecord::Feature
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# Using `self.table_name` won't work. ActiveRecord bug?
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superclass.table_name = 'features'
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def self.feature_names
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pluck(:key)
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end
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end
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class FlipperGate < Flipper::Adapters::ActiveRecord::Gate
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superclass.table_name = 'feature_gates'
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end
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class << self
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delegate :group, to: :flipper
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def all
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flipper.features.to_a
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end
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def get(key)
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flipper.feature(key)
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end
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def persisted_names
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if RequestStore.active?
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RequestStore[:flipper_persisted_names] ||= FlipperFeature.feature_names
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else
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FlipperFeature.feature_names
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end
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end
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def persisted?(feature)
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# Flipper creates on-memory features when asked for a not-yet-created one.
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# If we want to check if a feature has been actually set, we look for it
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# on the persisted features list.
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persisted_names.include?(feature.name.to_s)
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end
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# use `default_enabled: true` to default the flag to being `enabled`
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# unless set explicitly. The default is `disabled`
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def enabled?(key, thing = nil, default_enabled: false)
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feature = Feature.get(key)
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# If we're not default enabling the flag or the feature has been set, always evaluate.
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# `persisted?` can potentially generate DB queries and also checks for inclusion
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# in an array of feature names (177 at last count), possibly reducing performance by half.
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# So we only perform the `persisted` check if `default_enabled: true`
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!default_enabled || Feature.persisted?(feature) ? feature.enabled?(thing) : true
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end
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def disabled?(key, thing = nil, default_enabled: false)
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# we need to make different method calls to make it easy to mock / define expectations in test mode
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thing.nil? ? !enabled?(key, default_enabled: default_enabled) : !enabled?(key, thing, default_enabled: default_enabled)
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end
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def enable(key, thing = true)
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get(key).enable(thing)
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end
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def disable(key, thing = false)
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get(key).disable(thing)
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end
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def enable_group(key, group)
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get(key).enable_group(group)
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end
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def disable_group(key, group)
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get(key).disable_group(group)
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end
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def flipper
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if RequestStore.active?
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RequestStore[:flipper] ||= build_flipper_instance
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else
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@flipper ||= build_flipper_instance
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end
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end
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def build_flipper_instance
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Flipper.new(flipper_adapter).tap { |flip| flip.memoize = true }
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end
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# This method is called from config/initializers/flipper.rb and can be used
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# to register Flipper groups.
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# See https://docs.gitlab.com/ee/development/feature_flags.html#feature-groups
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def register_feature_groups
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end
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def flipper_adapter
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active_record_adapter = Flipper::Adapters::ActiveRecord.new(
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feature_class: FlipperFeature,
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gate_class: FlipperGate)
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Flipper::Adapters::ActiveSupportCacheStore.new(
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active_record_adapter,
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Rails.cache,
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expires_in: 1.hour)
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end
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end
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end
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