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Contents
require 'flipper/adapters/decorator'
module Flipper
module Adapters
# Internal: Adapter that wraps another adapter with the ability to memoize
# adapter calls in memory. Used by flipper dsl and the memoizer middleware
# to make it possible to memoize adapter calls for the duration of a request.
class Memoizable < Decorator
FeaturesKey = :flipper_features
# Internal
attr_reader :cache
# Public
def initialize(adapter, cache = nil)
super(adapter)
@cache = cache || {}
@memoize = false
end
# Public
def features
if memoizing?
cache.fetch(FeaturesKey) {
cache[FeaturesKey] = super
}
else
super
end
end
# Public
def add(feature)
result = super
cache.delete(FeaturesKey) if memoizing?
result
end
# Public
def remove(feature)
result = super
if memoizing?
cache.delete(FeaturesKey)
cache.delete(feature)
end
result
end
# Public
def clear(feature)
result = super
cache.delete(feature) if memoizing?
result
end
# Public
def get(feature)
if memoizing?
cache.fetch(feature) { cache[feature] = super }
else
super
end
end
# Public
def enable(feature, gate, thing)
result = super
cache.delete(feature) if memoizing?
result
end
# Public
def disable(feature, gate, thing)
result = super
cache.delete(feature) if memoizing?
result
end
# Internal: Turns local caching on/off.
#
# value - The Boolean that decides if local caching is on.
def memoize=(value)
cache.clear
@memoize = value
end
# Internal: Returns true for using local cache, false for not.
def memoizing?
!!@memoize
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems