--[[

    Copyright (C) 2016 ZTE, Inc. and others. All rights reserved. (ZTE)

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

            http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

--]]

-- round-robin cache over LRUCache， used within one worker processes
local _M = {}
_M._VERSION = '1.0.0'

local lrucache = require "resty.lrucache"

-- we need to initialize the cache on the lua module level so that
-- it can be shared by all the requests served by each nginx worker process:
local rrcache,err = lrucache.new(500)  -- allow up to 200 items in the cache
if not rrcache then
	return ngx.log(ngx.ERR,"failed to create the cache: " .. (err or "unknown"))
end

function _M.get(key)
	return rrcache:get(key)
end

function _M.set(key,value)
	rrcache:set(key, value)
end

return _M