1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
require 'fileutils'
require 'uri'
require 'set'
module ActionController #:nodoc:
# 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
# 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. This setting only affects action and fragment caching
# as page caching is always written to disk.
#
# Configuration examples (MemoryStore 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 = :drb_store, "druby://localhost:9192"
# 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
eager_autoload do
autoload :Actions
autoload :Fragments
autoload :Pages
autoload :Sweeper, 'action_controller/caching/sweeping'
autoload :Sweeping, 'action_controller/caching/sweeping'
end
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 ConfigMethods
include Pages, Actions, Fragments
include Sweeping if defined?(ActiveRecord)
included do
extend ConfigMethods
@@perform_caching = true
cattr_accessor :perform_caching
end
def caching_allowed?
request.get? && response.status == 200
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
|
