Sha256: 3b03bd621c184e61f96326b82f78ad51322415007c8fe67aa761fcd01beea11d
Contents?: true
Size: 1.72 KB
Versions: 9
Compression:
Stored size: 1.72 KB
Contents
# encoding: utf-8
#
# This file is part of the elephas gem. Copyright (C) 2013 and above Shogun <shogun_panda@me.com>.
# Licensed under the MIT license, which can be found at http://www.opensource.org/licenses/mit-license.php.
#
module Elephas
module Backends
# This is a Ruby on Rails backend, which uses Rails.cache.
class RubyOnRails < Base
# Reads a value from the cache.
#
# @param key [String] The key to lookup.
# @return [Entry|NilClass] The read value or `nil`.
def read(key)
exists?(key) ? Rails.cache.read(key) : nil
end
# Writes a value to the cache.
#
# @param key [String] The key to associate the value with.
# @param value [Object] The value to write. **Setting a value to `nil` **doesn't** mean *deleting* the value.
# @param options [Hash] A list of options for writing.
# @see Elephas::Cache.setup_options
# @return [Object] The value itself.
def write(key, value, options = {})
entry = ::Elephas::Entry.ensure(value, key, options)
entry.refresh
Rails.cache.write(key, entry, expires_in: entry.ttl)
entry
end
# Deletes a value from the cache.
#
# @param key [String] The key to delete.
# @return [Boolean] `true` if the key was in the cache, `false` otherwise.
def delete(key)
rv = Rails.cache.exist?(key)
Rails.cache.delete(key)
rv
end
# Checks if a key exists in the cache.
#
# @param key [String] The key to lookup.
# @return [Boolean] `true` if the key is in the cache, `false` otherwise.
def exists?(key)
Rails.cache.exist?(key) && Rails.cache.read(key).valid?(self)
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems