mirror of
https://github.com/processone/ejabberd.git
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134 lines
4.0 KiB
Erlang
134 lines
4.0 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% File : mod_private_mnesia.erl
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%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2020 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_private_mnesia).
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-behaviour(mod_private).
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%% API
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-export([init/2, set_data/3, get_data/3, get_all_data/2, del_data/2,
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use_cache/1, import/3]).
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-export([need_transform/1, transform/1]).
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-include_lib("xmpp/include/xmpp.hrl").
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-include("mod_private.hrl").
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-include("logger.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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ejabberd_mnesia:create(?MODULE, private_storage,
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[{disc_only_copies, [node()]},
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{attributes, record_info(fields, private_storage)}]).
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use_cache(Host) ->
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case mnesia:table_info(private_storage, storage_type) of
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disc_only_copies ->
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mod_private_opt:use_cache(Host);
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_ ->
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false
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end.
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set_data(LUser, LServer, Data) ->
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F = fun () ->
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lists:foreach(
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fun({XmlNS, Xmlel}) ->
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mnesia:write(
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#private_storage{
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usns = {LUser, LServer, XmlNS},
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xml = Xmlel})
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end, Data)
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end,
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transaction(F).
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get_data(LUser, LServer, XmlNS) ->
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case mnesia:dirty_read(private_storage, {LUser, LServer, XmlNS}) of
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[#private_storage{xml = Storage_Xmlel}] ->
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{ok, Storage_Xmlel};
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_ ->
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error
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end.
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get_all_data(LUser, LServer) ->
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case lists:flatten(
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mnesia:dirty_select(private_storage,
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[{#private_storage{usns = {LUser, LServer, '_'},
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xml = '$1'},
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[], ['$1']}])) of
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[] ->
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error;
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Res ->
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{ok, Res}
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end.
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del_data(LUser, LServer) ->
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F = fun () ->
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Namespaces = mnesia:select(private_storage,
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[{#private_storage{usns =
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{LUser,
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LServer,
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'$1'},
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_ = '_'},
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[], ['$$']}]),
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lists:foreach(fun ([Namespace]) ->
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mnesia:delete({private_storage,
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{LUser, LServer,
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Namespace}})
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end,
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Namespaces)
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end,
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transaction(F).
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import(LServer, <<"private_storage">>,
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[LUser, XMLNS, XML, _TimeStamp]) ->
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El = #xmlel{} = fxml_stream:parse_element(XML),
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PS = #private_storage{usns = {LUser, LServer, XMLNS}, xml = El},
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mnesia:dirty_write(PS).
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need_transform({private_storage, {U, S, NS}, _})
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when is_list(U) orelse is_list(S) orelse is_list(NS) ->
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?INFO_MSG("Mnesia table 'private_storage' will be converted to binary", []),
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true;
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need_transform(_) ->
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false.
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transform(#private_storage{usns = {U, S, NS}, xml = El} = R) ->
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R#private_storage{usns = {iolist_to_binary(U),
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iolist_to_binary(S),
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iolist_to_binary(NS)},
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xml = fxml:to_xmlel(El)}.
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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transaction(F) ->
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case mnesia:transaction(F) of
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{atomic, Res} ->
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Res;
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{aborted, Reason} ->
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?ERROR_MSG("Mnesia transaction failed: ~p", [Reason]),
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{error, db_failure}
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end.
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