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--[[
Copyright (c) 2012 Kaarle Ritvanen
See LICENSE file for license details
--]]
module(..., package.seeall)
local object = require('acf.object')
local super = object.super
local pth = require('acf.path')
local util = require('acf.util')
DataStore = object.class(require('acf.transaction.backend').TransactionBackend)
function DataStore:init()
super(self, DataStore):init()
self.backends = util.map(function(m) return m.backend() end,
util.loadmods('persistence/backends'))
end
function DataStore:split_path(path)
local comps = pth.split(path)
local backend = self.backends[comps[1]]
assert(backend)
table.remove(comps, 1)
return backend, comps
end
function DataStore:get(path)
local backend, comps = self:split_path(path)
return util.copy(backend:get(comps)), self.mod_time[path] or 0
end
function DataStore:set_multiple(mods)
super(self, DataStore):set_multiple(mods)
local bms = {}
for _, mod in ipairs(mods) do
local path, t, value = unpack(mod)
local backend, comps = self:split_path(path)
if not bms[backend] then bms[backend] = {} end
table.insert(bms[backend], {comps, t, value})
end
for backend, bm in pairs(bms) do backend:set(bm) end
end
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