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