87 lines
1.8 KiB
Ruby
87 lines
1.8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
class JsonCache
|
|
attr_reader :backend, :cache_key_with_version, :namespace
|
|
|
|
def initialize(options = {})
|
|
@backend = options.fetch(:backend, Rails.cache)
|
|
@namespace = options.fetch(:namespace, nil)
|
|
@cache_key_with_version = options.fetch(:cache_key_with_version, true)
|
|
end
|
|
|
|
def active?
|
|
if backend.respond_to?(:active?)
|
|
backend.active?
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
def cache_key(key)
|
|
expanded_cache_key = [namespace, key].compact
|
|
|
|
if cache_key_with_version
|
|
expanded_cache_key << Rails.version
|
|
end
|
|
|
|
expanded_cache_key.join(':')
|
|
end
|
|
|
|
def expire(key)
|
|
backend.delete(cache_key(key))
|
|
end
|
|
|
|
def read(key, klass = nil)
|
|
value = backend.read(cache_key(key))
|
|
value = parse_value(value, klass) if value
|
|
value
|
|
end
|
|
|
|
def write(key, value, options = nil)
|
|
backend.write(cache_key(key), value.to_json, options)
|
|
end
|
|
|
|
def fetch(key, options = {}, &block)
|
|
klass = options.delete(:as)
|
|
value = read(key, klass)
|
|
|
|
return value unless value.nil?
|
|
|
|
value = yield
|
|
|
|
write(key, value, options)
|
|
|
|
value
|
|
end
|
|
|
|
private
|
|
|
|
def parse_value(raw, klass)
|
|
value = ActiveSupport::JSON.decode(raw)
|
|
|
|
case value
|
|
when Hash then parse_entry(value, klass)
|
|
when Array then parse_entries(value, klass)
|
|
else
|
|
value
|
|
end
|
|
rescue ActiveSupport::JSON.parse_error
|
|
nil
|
|
end
|
|
|
|
def parse_entry(raw, klass)
|
|
klass.new(raw) if valid_entry?(raw, klass)
|
|
end
|
|
|
|
def valid_entry?(raw, klass)
|
|
return false unless klass && raw.is_a?(Hash)
|
|
|
|
(raw.keys - klass.attribute_names).empty?
|
|
end
|
|
|
|
def parse_entries(values, klass)
|
|
values.map { |value| parse_entry(value, klass) }.compact
|
|
end
|
|
end
|
|
end
|