Module: ActionController::Caching
- Defined in:
- lib/action_controller/caching.rb,
lib/action_controller/caching/pages.rb,
lib/action_controller/caching/actions.rb,
lib/action_controller/caching/sweeping.rb,
lib/action_controller/caching/fragments.rb,
lib/action_controller/caching/sql_cache.rb
Overview
Caching is a cheap way of speeding up slow applications by keeping the result of calculations, renderings, and database calls around for subsequent requests. Action Controller affords you three approaches in varying levels of granularity: Page, Action, Fragment.
You can read more about each approach and the sweeping assistance by clicking the modules below.
Note: To turn off all caching and sweeping, set Base.perform_caching = false.
Caching stores
All the caching stores from ActiveSupport::Cache is available to be used as backends for Action Controller caching. This setting only affects action and fragment caching as page caching is always written to disk.
Configuration examples (MemoryStore is the default):
ActionController::Base.cache_store = :memory_store
ActionController::Base.cache_store = :file_store, "/path/to/cache/directory"
ActionController::Base.cache_store = :drb_store, "druby://localhost:9192"
ActionController::Base.cache_store = :mem_cache_store, "localhost"
ActionController::Base.cache_store = MyOwnStore.new("parameter")
Defined Under Namespace
Modules: Actions, Fragments, Pages, SqlCache, Sweeping Classes: Sweeper
Class Method Summary collapse
-
.included(base) ⇒ Object
:nodoc:.
Class Method Details
.included(base) ⇒ Object
:nodoc:
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# File 'lib/action_controller/caching.rb', line 34 def self.included(base) #:nodoc: base.class_eval do @@cache_store = nil cattr_reader :cache_store # Defines the storage option for cached fragments def self.cache_store=(store_option) @@cache_store = ActiveSupport::Cache.lookup_store(store_option) end include Pages, Actions, Fragments include Sweeping, SqlCache if defined?(ActiveRecord) @@perform_caching = true cattr_accessor :perform_caching def self.cache_configured? perform_caching && cache_store end end end |