vendor/rails/actionpack/lib/action_controller/session/mem_cache_store.rb

   1 begin
   2   require_library_or_gem 'memcache'
   3
   4   module ActionController
   5     module Session
   6       class MemCacheStore < AbstractStore
   7         def initialize(app, options = {})
   8           # Support old :expires option
   9           options[:expire_after] ||= options[:expires]
  10
  11           super
  12
  13           @default_options = {
  14             :namespace => 'rack:session',
  15             :memcache_server => 'localhost:11211'
  16           }.merge(@default_options)
  17
  18           @pool = options[:cache] || MemCache.new(@default_options[:memcache_server], @default_options)
  19           unless @pool.servers.any? { |s| s.alive? }
  20             raise "#{self} unable to find server during initialization."
  21           end
  22           @mutex = Mutex.new
  23
  24           super
  25         end
  26
  27         private
  28           def get_session(env, sid)
  29             sid ||= generate_sid
  30             begin
  31               session = @pool.get(sid) || {}
  32             rescue MemCache::MemCacheError, Errno::ECONNREFUSED
  33               session = {}
  34             end
  35             [sid, session]
  36           end
  37
  38           def set_session(env, sid, session_data)
  39             options = env['rack.session.options']
  40             expiry  = options[:expire_after] || 0
  41             @pool.set(sid, session_data, expiry)
  42             return true
  43           rescue MemCache::MemCacheError, Errno::ECONNREFUSED
  44             return false
  45           end
  46       end
  47     end
  48   end
  49 rescue LoadError
  50   # MemCache wasn't available so neither can the store be
  51 end