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+%%%-------------------------------------------------------------------
+%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
+%%% Created : 28 Mar 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
+%%%
+%%%
+%%% ejabberd, Copyright (C) 2002-2019 ProcessOne
+%%%
+%%% This program is free software; you can redistribute it and/or
+%%% modify it under the terms of the GNU General Public License as
+%%% published by the Free Software Foundation; either version 2 of the
+%%% License, or (at your option) any later version.
+%%%
+%%% This program 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
+%%% General Public License for more details.
+%%%
+%%% You should have received a copy of the GNU General Public License along
+%%% with this program; if not, write to the Free Software Foundation, Inc.,
+%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+%%%
+%%%-------------------------------------------------------------------
+-module(ejabberd_router_sql).
+-behaviour(ejabberd_router).
+
+
+%% API
+-export([init/0, register_route/5, unregister_route/3, find_routes/1,
+ get_all_routes/0]).
+
+-include("logger.hrl").
+-include("ejabberd_sql_pt.hrl").
+-include("ejabberd_router.hrl").
+-include("ejabberd_stacktrace.hrl").
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+init() ->
+ Node = erlang:atom_to_binary(node(), latin1),
+ ?DEBUG("Cleaning SQL 'route' table...", []),
+ case ejabberd_sql:sql_query(
+ ejabberd_config:get_myname(), ?SQL("delete from route where node=%(Node)s")) of
+ {updated, _} ->
+ ok;
+ Err ->
+ ?ERROR_MSG("Failed to clean 'route' table: ~p", [Err]),
+ Err
+ end.
+
+register_route(Domain, ServerHost, LocalHint, _, Pid) ->
+ PidS = misc:encode_pid(Pid),
+ LocalHintS = enc_local_hint(LocalHint),
+ Node = erlang:atom_to_binary(node(Pid), latin1),
+ case ?SQL_UPSERT(ejabberd_config:get_myname(), "route",
+ ["!domain=%(Domain)s",
+ "!server_host=%(ServerHost)s",
+ "!node=%(Node)s",
+ "!pid=%(PidS)s",
+ "local_hint=%(LocalHintS)s"]) of
+ ok ->
+ ok;
+ _ ->
+ {error, db_failure}
+ end.
+
+unregister_route(Domain, _, Pid) ->
+ PidS = misc:encode_pid(Pid),
+ Node = erlang:atom_to_binary(node(Pid), latin1),
+ case ejabberd_sql:sql_query(
+ ejabberd_config:get_myname(),
+ ?SQL("delete from route where domain=%(Domain)s "
+ "and pid=%(PidS)s and node=%(Node)s")) of
+ {updated, _} ->
+ ok;
+ _ ->
+ {error, db_failure}
+ end.
+
+find_routes(Domain) ->
+ case ejabberd_sql:sql_query(
+ ejabberd_config:get_myname(),
+ ?SQL("select @(server_host)s, @(node)s, @(pid)s, @(local_hint)s "
+ "from route where domain=%(Domain)s")) of
+ {selected, Rows} ->
+ {ok, lists:flatmap(
+ fun(Row) ->
+ row_to_route(Domain, Row)
+ end, Rows)};
+ _ ->
+ {error, db_failure}
+ end.
+
+get_all_routes() ->
+ case ejabberd_sql:sql_query(
+ ejabberd_config:get_myname(),
+ ?SQL("select @(domain)s from route where domain <> server_host")) of
+ {selected, Domains} ->
+ {ok, [Domain || {Domain} <- Domains]};
+ _ ->
+ {error, db_failure}
+ end.
+
+%%%===================================================================
+%%% Internal functions
+%%%===================================================================
+enc_local_hint(undefined) ->
+ <<"">>;
+enc_local_hint(LocalHint) ->
+ misc:term_to_expr(LocalHint).
+
+dec_local_hint(<<"">>) ->
+ undefined;
+dec_local_hint(S) ->
+ ejabberd_sql:decode_term(S).
+
+row_to_route(Domain, {ServerHost, NodeS, PidS, LocalHintS} = Row) ->
+ try [#route{domain = Domain,
+ server_host = ServerHost,
+ pid = misc:decode_pid(PidS, NodeS),
+ local_hint = dec_local_hint(LocalHintS)}]
+ catch _:{bad_node, _} ->
+ [];
+ ?EX_RULE(Class, Reason, St) ->
+ StackTrace = ?EX_STACK(St),
+ ?ERROR_MSG("Failed to decode row from 'route' table:~n"
+ "** Row = ~p~n"
+ "** Domain = ~ts~n"
+ "** ~ts",
+ [Row, Domain,
+ misc:format_exception(2, Class, Reason, StackTrace)]),
+ []
+ end.