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%%%-------------------------------------------------------------------
%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2015-2016, Evgeny Khramtsov
%%% @doc
%%%
%%% @end
%%% Created : 9 Mar 2015 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%-------------------------------------------------------------------
-module(ejabberd_sm_sql).
-compile([{parse_transform, ejabberd_sql_pt}]).
-behaviour(ejabberd_sm).
%% API
-export([init/0,
set_session/1,
delete_session/4,
get_sessions/0,
get_sessions/1,
get_sessions/2,
get_sessions/3]).
-include("ejabberd.hrl").
-include("ejabberd_sm.hrl").
-include("logger.hrl").
-include("jlib.hrl").
-include("ejabberd_sql_pt.hrl").
%%%===================================================================
%%% API
%%%===================================================================
-spec init() -> ok | {error, any()}.
init() ->
Node = jlib:atom_to_binary(node()),
?INFO_MSG("Cleaning SQL SM table...", []),
lists:foldl(
fun(Host, ok) ->
case ejabberd_sql:sql_query(
Host, ?SQL("delete from sm where node=%(Node)s")) of
{updated, _} ->
ok;
Err ->
?ERROR_MSG("failed to clean 'sm' table: ~p", [Err]),
Err
end;
(_, Err) ->
Err
end, ok, ejabberd_sm:get_vh_by_backend(?MODULE)).
set_session(#session{sid = {Now, Pid}, usr = {U, LServer, R},
priority = Priority, info = Info}) ->
InfoS = jlib:term_to_expr(Info),
PrioS = enc_priority(Priority),
TS = now_to_timestamp(Now),
PidS = list_to_binary(erlang:pid_to_list(Pid)),
Node = jlib:atom_to_binary(node(Pid)),
case ?SQL_UPSERT(LServer, "sm",
["!usec=%(TS)d",
"!pid=%(PidS)s",
"node=%(Node)s",
"username=%(U)s",
"resource=%(R)s",
"priority=%(PrioS)s",
"info=%(InfoS)s"]) of
ok ->
ok;
Err ->
?ERROR_MSG("failed to update 'sm' table: ~p", [Err])
end.
delete_session(_LUser, LServer, _LResource, {Now, Pid}) ->
TS = now_to_timestamp(Now),
PidS = list_to_binary(erlang:pid_to_list(Pid)),
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(usec)d, @(pid)s, @(username)s,"
" @(resource)s, @(priority)s, @(info)s "
"from sm where usec=%(TS)d and pid=%(PidS)s")) of
{selected, [Row]} ->
ejabberd_sql:sql_query(
LServer,
?SQL("delete from sm"
" where usec=%(TS)d and pid=%(PidS)s")),
{ok, row_to_session(LServer, Row)};
{selected, []} ->
{error, notfound};
Err ->
?ERROR_MSG("failed to delete from 'sm' table: ~p", [Err]),
{error, notfound}
end.
get_sessions() ->
lists:flatmap(
fun(LServer) ->
get_sessions(LServer)
end, ejabberd_sm:get_vh_by_backend(?MODULE)).
get_sessions(LServer) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(usec)d, @(pid)s, @(username)s,"
" @(resource)s, @(priority)s, @(info)s from sm")) of
{selected, Rows} ->
[row_to_session(LServer, Row) || Row <- Rows];
Err ->
?ERROR_MSG("failed to select from 'sm' table: ~p", [Err]),
[]
end.
get_sessions(LUser, LServer) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(usec)d, @(pid)s, @(username)s,"
" @(resource)s, @(priority)s, @(info)s from sm"
" where username=%(LUser)s")) of
{selected, Rows} ->
[row_to_session(LServer, Row) || Row <- Rows];
Err ->
?ERROR_MSG("failed to select from 'sm' table: ~p", [Err]),
[]
end.
get_sessions(LUser, LServer, LResource) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(usec)d, @(pid)s, @(username)s,"
" @(resource)s, @(priority)s, @(info)s from sm"
" where username=%(LUser)s and resource=%(LResource)s")) of
{selected, Rows} ->
[row_to_session(LServer, Row) || Row <- Rows];
Err ->
?ERROR_MSG("failed to select from 'sm' table: ~p", [Err]),
[]
end.
%%%===================================================================
%%% Internal functions
%%%===================================================================
now_to_timestamp({MSec, Sec, USec}) ->
(MSec * 1000000 + Sec) * 1000000 + USec.
timestamp_to_now(I) ->
Head = I div 1000000,
USec = I rem 1000000,
MSec = Head div 1000000,
Sec = Head div 1000000,
{MSec, Sec, USec}.
dec_priority(Prio) ->
case catch jlib:binary_to_integer(Prio) of
{'EXIT', _} ->
undefined;
Int ->
Int
end.
enc_priority(undefined) ->
<<"">>;
enc_priority(Int) when is_integer(Int) ->
jlib:integer_to_binary(Int).
row_to_session(LServer, {USec, PidS, User, Resource, PrioS, InfoS}) ->
Now = timestamp_to_now(USec),
Pid = erlang:list_to_pid(binary_to_list(PidS)),
Priority = dec_priority(PrioS),
Info = ejabberd_sql:decode_term(InfoS),
#session{sid = {Now, Pid}, us = {User, LServer},
usr = {User, LServer, Resource},
priority = Priority,
info = Info}.
|
