About

memcache_fragments is a very simple plugin (10 lines of code!) that

1. makes rails fragment caching play nice with robot coop’s memcache-client by wrapping its get/set methods with read/write methods that rails expects.
2. makes it easy to do time based fragment expiry using this syntax:

  <% cache 'my/cache/key', :expire => 10.minutes do %>
        ...
  <% end %>

Installing and using memcache_fragments

You’ll first need the memcache-client gem from robot coop

  $ sdo gem install memcache-client

Now install the plugin

  $ script/plugin install memcache_fragments

Alternatively, you can use the gem

  $ sudo gem install memcache_fragments

  # in environment.rb
  require 'memcache_fragments'

Setting up the fragment cache

See the docs from memcache-client, but I found placing this in your environment.rb (or specific environment) to be the easiest:

  CACHE = MemCache.new :c_threshold => 10_000,:compression => true,:debug => false,:namespace => 'mycachespace',:readonly => false,:urlencode => false
  CACHE.servers = 'localhost:11211'

  config.action_controller.session_store = :mem_cache_store
  config.action_controller.fragment_cache_store = CACHE, {}
  ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS.merge!({ 'cache' => CACHE })