diff options
Diffstat (limited to 'actionpack/lib/action_dispatch')
-rw-r--r-- | actionpack/lib/action_dispatch/middleware/callbacks.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/callbacks.rb b/actionpack/lib/action_dispatch/middleware/callbacks.rb new file mode 100644 index 0000000000..0a2b4cf5f7 --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/callbacks.rb @@ -0,0 +1,40 @@ +module ActionDispatch + class Callbacks + include ActiveSupport::Callbacks + define_callbacks :prepare, :before, :after + + class << self + # DEPRECATED + alias_method :prepare_dispatch, :prepare + alias_method :before_dispatch, :before + alias_method :after_dispatch, :after + end + + # Add a preparation callback. Preparation callbacks are run before every + # request in development mode, and before the first request in production + # mode. + # + # An optional identifier may be supplied for the callback. If provided, + # to_prepare may be called again with the same identifier to replace the + # existing callback. Passing an identifier is a suggested practice if the + # code adding a preparation block may be reloaded. + def self.to_prepare(identifier = nil, &block) + @prepare_callbacks ||= ActiveSupport::Callbacks::CallbackChain.new + callback = ActiveSupport::Callbacks::Callback.new(:prepare, block, :identifier => identifier) + @prepare_callbacks.replace_or_append!(callback) + end + + def initialize(app, prepare_each_request = false) + @app, @prepare_each_request = app, prepare_each_request + run_callbacks :prepare + end + + def call(env) + run_callbacks :before + run_callbacks :prepare if @prepare_each_request + @app.call(env) + ensure + run_callbacks :after, :enumerator => :reverse_each + end + end +end |