85 lines
2.6 KiB
Ruby
85 lines
2.6 KiB
Ruby
require 'fileutils'
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require 'uri'
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require 'set'
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module ActionController #:nodoc:
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# Caching is a cheap way of speeding up slow applications by keeping the result of
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# calculations, renderings, and database calls around for subsequent requests.
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# Action Controller affords you three approaches in varying levels of granularity:
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# Page, Action, Fragment.
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#
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# You can read more about each approach and the sweeping assistance by clicking the
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# modules below.
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#
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# Note: To turn off all caching and sweeping, set
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# config.action_controller.perform_caching = false.
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#
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# == Caching stores
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#
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# All the caching stores from ActiveSupport::Cache are available to be used as backends
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# for Action Controller caching. This setting only affects action and fragment caching
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# as page caching is always written to disk.
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#
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# Configuration examples (MemoryStore is the default):
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#
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# config.action_controller.cache_store = :memory_store
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# config.action_controller.cache_store = :file_store, "/path/to/cache/directory"
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# config.action_controller.cache_store = :drb_store, "druby://localhost:9192"
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# config.action_controller.cache_store = :mem_cache_store, "localhost"
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# config.action_controller.cache_store = :mem_cache_store, Memcached::Rails.new("localhost:11211")
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# config.action_controller.cache_store = MyOwnStore.new("parameter")
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module Caching
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extend ActiveSupport::Concern
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extend ActiveSupport::Autoload
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eager_autoload do
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autoload :Actions
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autoload :Fragments
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autoload :Pages
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autoload :Sweeper, 'action_controller/caching/sweeping'
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autoload :Sweeping, 'action_controller/caching/sweeping'
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end
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included do
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@@cache_store = nil
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cattr_reader :cache_store
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# Defines the storage option for cached fragments
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def self.cache_store=(store_option)
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@@cache_store = ActiveSupport::Cache.lookup_store(store_option)
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end
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include Pages, Actions, Fragments
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include Sweeping if defined?(ActiveRecord)
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@@perform_caching = true
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cattr_accessor :perform_caching
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end
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module ClassMethods
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def cache_configured?
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perform_caching && cache_store
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end
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end
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def caching_allowed?
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request.get? && response.status == 200
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end
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protected
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# Convenience accessor
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def cache(key, options = {}, &block)
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if cache_configured?
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cache_store.fetch(ActiveSupport::Cache.expand_cache_key(key, :controller), options, &block)
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else
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yield
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end
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end
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private
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def cache_configured?
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self.class.cache_configured?
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end
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end
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end
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