memcache - sessions & cache

Gemfile

@@ -32,6 +32,7 @@ group :assets do
 end
 
 gem 'jquery-rails'
+gem 'dalli', '~> 1.1.3'
 # gem 'foreigner' ?
 
 group :test, :development do

Gemfile.lock

@@ -76,6 +76,7 @@ GEM
       chunky_png (~> 1.2)
       fssm (>= 0.2.7)
       sass (~> 3.1)
+    dalli (1.1.3)
     database_cleaner (0.6.7)
     devise (1.4.8)
       bcrypt-ruby (~> 3.0)
@@ -222,6 +223,7 @@ DEPENDENCIES
   capybara (~> 1.1.1)
   coffee-rails (~> 3.1.0)
   compass (~> 0.12.alpha.0)
+  dalli (~> 1.1.3)
   database_cleaner (~> 0.6.7)
   devise (~> 1.4.5)
   factory_girl_rails (~> 1.2)

config/environment.rb

@@ -3,3 +3,15 @@ require File.expand_path('../application', __FILE__)
 
 # Initialize the rails application
 Entrydns::Application.initialize!
+
+if defined?(PhusionPassenger)
+  PhusionPassenger.on_event(:starting_worker_process) do |forked|
+    # Reset Rails's object cache
+    # Only works with DalliStore
+    Rails.cache.reset if forked
+
+    # Reset Rails's session store
+    # If you know a cleaner way to find the session store instance, please let me know
+    ObjectSpace.each_object(ActionDispatch::Session::DalliStore) { |obj| obj.reset }
+  end
+end

config/environments/production.rb

@@ -38,7 +38,13 @@ Entrydns::Application.configure do
 
   # Use a different cache store in production
   # config.cache_store = :mem_cache_store
-
+  config.cache_store = :dalli_store, 'localhost', {
+    :memcache_server => ['127.0.0.1'],
+    :namespace => 'entrydns',
+    :expires_in => 1.day,
+    :compress => true
+  }
+  
   # Enable serving of images, stylesheets, and JavaScripts from an asset server
   # config.action_controller.asset_host = "http://assets.example.com"
 

config/initializers/session_store.rb

@@ -1,6 +1,13 @@
 # Be sure to restart your server when you modify this file.
 
-Entrydns::Application.config.session_store :cookie_store, key: '_entrydns_session'
+require 'action_dispatch/middleware/session/dalli_store'
+Rails.application.config.session_store :dalli_store, 
+  :memcache_server => ['127.0.0.1'],
+  :namespace => 'entrydns',
+  :key => '_entrydns_session',
+  :expire_after => 2.hours
+
+# Entrydns::Application.config.session_store :cookie_store, key: '_entrydns_session'
 
 # Use the database for sessions instead of the cookie-based default,
 # which shouldn't be used to store highly confidential information