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Copyright © 2011 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <>.
(** A layer than adds transaction support. Designed to work with a stack
with the Badop_sync layer (which has only primitive transaction support)
at the bottom, possibly with a clien-server link in-between.
Should not be used on top of expensive transactions, such as those
in Badop_local. Otherwise it's inefficient, because the transactions
of the lower layers are aggregated in large numbers within the higher
level transactions, just as primitive DB write operations.
This is WIP. For now we know and subvert the structure of the lower layer.
(* Not implemented yet
module F : functor (Backend: Badop.S
(* TODO: remove all these constraints, one by one. *)
with type database = Badop_sync.database
and type transaction = Badop_sync.transaction
and type revision = Badop_sync.revision
) -> Badop.S