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require 'action_dispatch/caching/fragments'
require 'fileutils'
require 'uri'
module ActionController
# \Caching is a cheap way of speeding up slow applications by keeping the result of
# calculations, renderings, and database calls around for subsequent requests.
#
# You can read more about each approach by clicking the modules below.
#
# Note: To turn off all caching provided by Action Controller, set
# config.action_controller.perform_caching = false
#
# == \Caching stores
#
# All the caching stores from ActiveSupport::Cache are available to be used as backends
# for Action Controller caching.
#
# Configuration examples (FileStore is the default):
#
# config.action_controller.cache_store = :memory_store
# config.action_controller.cache_store = :file_store, '/path/to/cache/directory'
# config.action_controller.cache_store = :mem_cache_store, 'localhost'
# config.action_controller.cache_store = :mem_cache_store, Memcached::Rails.new('localhost:11211')
# config.action_controller.cache_store = MyOwnStore.new('parameter')
module Caching
extend ActiveSupport::Concern
extend ActiveSupport::Autoload
module ConfigMethods
def cache_store
config.cache_store
end
def cache_store=(store)
config.cache_store = ActiveSupport::Cache.lookup_store(store)
end
private
def cache_configured?
perform_caching && cache_store
end
end
include AbstractController::Callbacks
include ConfigMethods
include ActionDispatch::Caching::Fragments
included do
extend ConfigMethods
config_accessor :default_static_extension
self.default_static_extension ||= '.html'
config_accessor :perform_caching
self.perform_caching = true if perform_caching.nil?
class_attribute :_view_cache_dependencies
self._view_cache_dependencies = []
helper_method :view_cache_dependencies if respond_to?(:helper_method)
end
module ClassMethods
def view_cache_dependency(&dependency)
self._view_cache_dependencies += [dependency]
end
end
def view_cache_dependencies
self.class._view_cache_dependencies.map { |dep| instance_exec(&dep) }.compact
end
protected
# Convenience accessor.
def cache(key, options = {}, &block)
if cache_configured?
cache_store.fetch(ActiveSupport::Cache.expand_cache_key(key, :controller), options, &block)
else
yield
end
end
end
end
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