write (ActiveSupport::Cache::MemCacheStore)

    # File lib/active_support/cache/mem_cache_store.rb, line 71
          def write(key, value, options = nil)
            super
            method = options && options[:unless_exist] ? :add : :set
            # memcache-client will break the connection if you send it an integer
            # in raw mode, so we convert it to a string to be sure it continues working.
            value = value.to_s if raw?(options)
            response = @data.send(method, key, value, expires_in(options), raw?(options))
            response == Response::STORED
          rescue MemCache::MemCacheError => e
            logger.error("MemCacheError (#{e}): #{e.message}")
            false
          end