Sha256: 9f075516626999352f7f0b2f3e2060eb3a3aaaf3d6e1471e554f5e39534fe60a
Contents?: true
Size: 1.98 KB
Versions: 8
Compression:
Stored size: 1.98 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 simple backend, which uses an hash for storing the values.
#
# @attribute data
# @return [HashWithIndifferentAccess] The internal hash used by the backend.
class Hash < Base
attr_accessor :data
# Initialize the backend.
#
# @param data [Hash] The initial data stored.
def initialize(data = nil)
@data = data.ensure_hash({}).with_indifferent_access
end
# 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) ? @data[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
@data[key] = entry
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 = @data.has_key?(key)
@data.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)
@data.has_key?(key) && @data[key].valid?(self)
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems