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%%%-------------------------------------------------------------------
%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2016, Evgeny Khramtsov
%%% @doc
%%%
%%% @end
%%% Created : 15 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%-------------------------------------------------------------------
-module(mod_carboncopy_mnesia).
-behaviour(mod_carboncopy).
%% API
-export([init/2, enable/4, disable/3, list/2]).
-include("mod_carboncopy.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
Fields = record_info(fields, carboncopy),
try mnesia:table_info(carboncopy, attributes) of
Fields ->
ok;
_ ->
%% recreate..
mnesia:delete_table(carboncopy)
catch _:_Error ->
%% probably table don't exist
ok
end,
mnesia:create_table(carboncopy,
[{ram_copies, [node()]},
{attributes, record_info(fields, carboncopy)},
{type, bag}]),
mnesia:add_table_copy(carboncopy, node(), ram_copies).
enable(LUser, LServer, LResource, NS) ->
try mnesia:dirty_write(
#carboncopy{us = {LUser, LServer},
resource = LResource,
version = NS}) of
ok -> ok
catch _:Error ->
{error, Error}
end.
disable(LUser, LServer, LResource) ->
ToDelete = mnesia:dirty_match_object(
#carboncopy{us = {LUser, LServer},
resource = LResource,
version = '_'}),
try lists:foreach(fun mnesia:dirty_delete_object/1, ToDelete) of
ok -> ok
catch _:Error ->
{error, Error}
end.
list(LUser, LServer) ->
mnesia:dirty_select(
carboncopy,
[{#carboncopy{us = {LUser, LServer}, resource = '$2', version = '$3'},
[], [{{'$2','$3'}}]}]).
%%%===================================================================
%%% Internal functions
%%%===================================================================
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