Configure cache stores

rely on RAM caching for devel, and optionally a memcached server in production

Gemfile

@@ -214,6 +214,9 @@ gem 'selectize-rails'
 # CVE-2017-9049, CVE-2017-9050
 gem 'nokogiri', '>= 1.8.1'
 
+# memcached binary connector
+gem 'dalli'
+
 # Use guard and spring for testing in development
 group :development do
   # to launch specs when files are modified

Gemfile.lock

@@ -145,6 +145,7 @@ GEM
       safe_yaml (~> 1.0.0)
     currencies (0.4.2)
     daemons (1.1.9)
+    dalli (2.7.6)
     dante (0.2.0)
     database_cleaner (1.3.0)
     debug_inspector (0.0.3)
@@ -597,6 +598,7 @@ DEPENDENCIES
   country_select
   coveralls
   daemons
+  dalli
   database_cleaner
   delayed_job_active_record
   devise

config/environments/development.rb

@@ -12,6 +12,8 @@ Osem::Application.configure do
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
 
+  config.cache_store = :memory_store, { size: 64.megabytes }
+
   # Show full error reports and disable caching
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false

config/environments/production.rb

@@ -46,6 +46,14 @@ Osem::Application.configure do
 
   # Use a different cache store in production
   # config.cache_store = :mem_cache_store
+  if ENV["MEMCACHEDCLOUD_SERVERS"]
+    config.cache_store = :dalli_store, ENV["MEMCACHEDCLOUD_SERVERS"].split(','), {
+      username: ENV["MEMCACHEDCLOUD_USERNAME"],
+      password: ENV["MEMCACHEDCLOUD_PASSWORD"]
+    }
+  else
+    config.cache_store = :memory_store, { size: 64.megabytes }
+  end
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server
   # config.action_controller.asset_host = "http://assets.example.com"