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--!A cross-platform build utility based on Lua
--
-- 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.
--
-- Copyright (C) 2015-present, TBOOX Open Source Group.
--
-- @author ruki
-- @file memcache.lua
--
-- define module: memcache
local memcache = memcache or {}
local _instance = _instance or {}
-- load modules
local table = require("base/table")
-- new an instance
function _instance.new(name)
local instance = table.inherit(_instance)
instance._NAME = name
instance._ITEMS = {}
return instance
end
-- get cache name
function _instance:name()
return self._NAME
end
-- get all cached items
function _instance:items()
return self._ITEMS
end
-- get cache item value
function _instance:get(name)
return self._ITEMS[name]
end
-- set cache item value
function _instance:set(name, value)
self._ITEMS[name] = value
end
-- clear cache items
function _instance:clear()
self._ITEMS = {}
end
-- get cache instance
function memcache.cache(cachename)
local caches = memcache._CACHES
if not caches then
caches = {}
memcache._CACHES = caches
end
local instance = caches[cachename]
if not instance then
instance = _instance.new(cachename)
caches[cachename] = instance
end
return instance
end
-- get all caches
function memcache.caches()
return memcache._CACHES
end
-- get cache item value
function memcache.get(cachename, name)
return memcache.cache(cachename):get(name)
end
-- set cache item value
function memcache.set(cachename, name, value)
return memcache.cache(cachename):set(name, value)
end
-- clear caches of the given scope name, it will clear all caches if pattern is nil
--
-- @code
-- memcache.clear() -- clear all caches
-- memcache.clear("cachescope") -- clear caches with `cachescope.*`
-- @endcode
--
function memcache.clear(scopename)
local caches = memcache.caches()
if caches then
for _, cache in pairs(caches) do
if scopename then
if cache:name():startswith(scopename .. ".") then
cache:clear()
end
else
cache:clear()
end
end
end
end
-- return module: memcache
return memcache
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