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memoize.rb
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memoize.rb
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# Memoize module simply memoizes the values returned by lookup using
# a flat hash and can tremendously speed up the lookup process in a backend.
#
# To enable it you can simply include the Memoize module to your backend:
#
# I18n::Backend::Simple.include(I18n::Backend::Memoize)
#
# Notice that it's the responsibility of the backend to define whenever the
# cache should be cleaned.
module I18n
module Backend
module Memoize
def available_locales
@memoized_locales ||= super
end
def store_translations(locale, data, options = {})
reset_memoizations!(locale)
super
end
def reload!
reset_memoizations!
super
end
protected
def lookup(locale, key, scope = nil, options = {})
flat_key = I18n::Backend::Flatten.normalize_flat_keys(locale,
key, scope, options[:separator]).to_sym
flat_hash = memoized_lookup[locale.to_sym]
flat_hash.key?(flat_key) ? flat_hash[flat_key] : (flat_hash[flat_key] = super)
end
def memoized_lookup
@memoized_lookup ||= Hash.new { |h, k| h[k] = {} }
end
def reset_memoizations!(locale=nil)
@memoized_locales = nil
(locale ? memoized_lookup[locale.to_sym] : memoized_lookup).clear
end
end
end
end