cache_fuとcache_fu_find_hookを使ってみる
cache_fuとcache_fu_find_hookのインストール
cache_fuのインストール
ruby script/plugin install git://github.com/defunkt/cache_fu.git
エラーになるので・・・
Initialized empty Git repository in C:/rails2/app2/vendor/plugins/cache_fu/.git/ remote: Counting objects: 39, done. remote: Compressing objects: 100% (37/37), done. remote: Total 39 (delta 3), reused 23 (delta 0) Unpacking objects: 100% (39/39), done. From git://github.com/defunkt/cache_fu * branch HEAD -> FETCH_HEAD ** Checking for memcached in path... script/plugin: No such file or directory - which memcached Plugin not found: ["git://github.com/defunkt/cache_fu.git"]
vendor/plugins/cache_fu/install.rb の以下をコメントアウト
puts "** Checking for memcached in path..." if `which memcached`.strip.empty? $errors += 1 puts "!! Couldn't find memcached in your path. Are you sure you installed it? !!" puts "!! Check the README for help. You can't use acts_as_cached without it. !!" end
もう一度インストール
ruby vendor/plugins/cache_fu/install.rb
** Checking for memcache-client gem... ** Trying to copy memcached.yml.default to ./config/memcached.yml... ** Trying to copy memcached_ctl.default to ./script/memcached_ctl... ** acts_as_cached installed with no errors. Please edit the memcached.yml file t o your liking. ** Now would be a good time to check out the README. Enjoy your day.
cache_fu_find_hookのインストール
ruby script/plugin install git://github.com/morimori/cache_fu_find_hook.git
config/environment.rbを修正。
Rails::Initializer.run do |config| ... config.plugins = [:cache_fu, :cache_fu_find_hook, :all] ... end
使ってみる
Modelにこれだけを定義
models/user.rb
class User < ActiveRecord::Base acts_as_cached after_save :reset_cache after_destroy :expire_cache end
有効期限やfinderを指定することも可能
acts_as_cached :ttl => 1.minutes, :find_by => "col1"
※ finder を変更した場合は、:reset_cache, :expire_cache等は使えない。
Observerに定義できるか確認してみた
models/sqlite_observer.rb
class SqliteObserver < ActiveRecord::Observer observe :user acts_as_cached after_save :reset_cache after_destroy :expire_cache end
エラーになる・・・
C:/rails2/app2/vendor/plugins/cache_fu_find_hook/lib/cache_fu_find_hook.rb:20:in `acts_as_cached': undefined method `find' for class `Class' (NameError) from C:/rails2/app2/app/models/sqlite_observer.rb:4 from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.10/lib/active_support/dependencies.rb:406:in `load_without_new_constant_marking' ・・・
Observerに設定するのは無理っぽい
cache_fuのsessionについて
config/memcached.yml の sessions: を true にすると、セッション作成時にエラーになってしまう。
"1424" => Booting Mongrel => Rails 2.3.10 application starting on http://0.0.0.0:3002 => Call with -d to detach => Ctrl-C to shutdown server Wed Jan 12 01:10:08 +0900 2011: Read error: #<RuntimeError: #<ActionController::Session::MemCacheStore:0x2895468> unable to find server during initialization.> c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.10/lib/action_controller/session/mem_cache_store.rb:21:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.10/lib/action_controller/middleware_stack.rb:72:in `new' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.10/lib/action_controller/middleware_stack.rb:72:in `build' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.10/lib/action_controller/middleware_stack.rb:116:in `build' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.10/lib/active_support/inflector.rb:364:in `inject' ・・・
環境の所為なのか、どうなのか分からないが、cache_fuのsessionは使えない模様。
ただ、config/memcached.yml の sessions: を false にして、別にセッションの保管先をmemcachedに指定することで、セッションをmemcachedに保管することは可能。
以下、確認した時の session_store.rb と cache_fu の設定
config/initializers/session_store.rb
config = YAML.load(ERB.new(IO.read(File.dirname(__FILE__) + "/../memcached.yml")).result) ActionController::Base.session = { :memcache_server => config["defaults"]["servers"], :expire_after => config["defaults"]["session_ttl"], :namespace => config["defaults"]["namespace"] + "-#{ENV['RAILS_ENV']}", :key => "_app2_session", :secret => "789db92e8a6162f2185368ab0a1e5d8f2761bb25ebfb88e0b3e7ae4fe803d42981d32d96ca544aeb178e840f00f477c83bd370ff7d11f3de3f232052b59c83ce" } ActionController::Base.session_store = :mem_cache_store
config/memcached.yml
defaults: ttl: 1800 readonly: false urlencode: false c_threshold: 10000 compression: true debug: false namespace: app2 sessions: false session_servers: false fragments: true memory: 640 servers: - 192.168.24.111:11211 - 192.168.24.122:11211 benchmarking: false raise_errors: false fast_hash: false fastest_hash: false session_ttl: 86400
