1 files changed, 0 insertions, 70 deletions
diff --git a/acf/transaction/backend.lua b/acf/transaction/backend.lua
deleted file mode 100644
index 4393101..0000000
--- a/acf/transaction/backend.lua
+++ /dev/null
@@ -1,70 +0,0 @@
---[[
-Copyright (c) 2012-2013 Kaarle Ritvanen
-See LICENSE file for license details
---]]
-
-local M = {}
-
-local err = require('acf.error')
-
--- TODO each transaction backend (i.e. persistence manager or
--- transaction proper) should be implemented as a thread or have its
--- internal state stored in shared storage (with appropriate locking)
-
-
-local generation = 0
-function M.gen_number()
-   generation = generation + 1
-   return generation
-end
-
-
-M.TransactionBackend = require('acf.object').class()
-
-function M.TransactionBackend:init() self.mod_time = {} end
-
-function M.TransactionBackend:get_if_older(path, timestamp)
-   local value, ts = self:get(path)
-   if ts > timestamp then err.raise('conflict', path) end
-   return value, ts
-end
-
-function M.TransactionBackend:set(path, value)
-   self:set_multiple{{path, value}}
-end
-
-function M.TransactionBackend:set_multiple(mods)
-   -- TODO delegate to PM backends?
-   local timestamp = M.gen_number()
-   local effective = {}
-
-   local function tostr(s) return s ~= nil and tostring(s) or nil end
-
-   for _, mod in ipairs(mods) do
-      local path, value = unpack(mod)
-
-      if type(value) == 'table' or type(
-	 self:get(path)
-      ) == 'table' or self:get(path) ~= value then
-
-	 table.insert(effective, mod)
-	 self.mod_time[path] = timestamp
-      end
-   end
-
-   self:_set_multiple(effective)
-end
-
--- TODO should be atomic, mutex with set_multiple
-function M.TransactionBackend:comp_and_setm(accessed, mods)
-   local errors = err.ErrorDict()
-   for path, timestamp in pairs(accessed) do
-      errors:collect(self.get_if_older, self, path, timestamp)
-   end
-   errors:raise()
-
-   self:set_multiple(mods)
-end
-
-
-return M