Last active
August 29, 2015 14:04
-
-
Save lethe2211/66a865f4de1b98f47c98 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# -*- coding: utf-8 -*- | |
require 'json' | |
require 'fileutils' | |
=begin | |
JSONファイルを用いたファイルキャッシュ | |
=end | |
class JsonCache | |
def initialize(dir: "cache/") | |
@abspath = File.dirname(__FILE__) | |
@dir = dir | |
@prefix = "cache_" | |
@postfix = ".json" | |
FileUtils.mkdir_p("#{ @abspath }/#{ @dir }") unless File.exist?("#{ @abspath }/# { @dir }") # ディレクトリがなければ作る | |
end | |
# 保存したキャッシュファイルをオブジェクトの形で取り出す | |
def get(key, defValue: nil) | |
relpath = "/#{ @dir }#{ @prefix }#{ key.to_s }#{ @postfix }" | |
if not File.exists?(@abspath + relpath) | |
return defValue | |
end | |
f = open(@abspath + relpath, "r") | |
json = f.read | |
result = JSON.parse(json) | |
f.close | |
return result | |
end | |
# RubyオブジェクトをJSONに変換し,ファイルに保存する | |
def set(key, value) | |
relpath = "/#{ @dir }#{ @prefix }#{ key.to_s }#{ @postfix }" | |
open(@abspath + relpath, "w") do |io| | |
JSON.dump(value, io) | |
end | |
end | |
end | |
if __FILE__ == $0 | |
j = JsonCache.new | |
j.set("lethe2211", {id: "lethe2211", favorite: ["programming", "anime"]} # cache/に"cache_lethe2211.json"が作成され,データが格納される | |
p j.get("lethe2211") # => {"id"=>"lethe2211", "favorite"=>["programming", "anime"]} | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment