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%%%----------------------------------------------------------------------
%%% File : ejabberd_odbc_sup.erl
%%% Author : Alexey Shchepin <alexey@sevcom.net>
%%% Purpose : ODBC connections supervisor
%%% Created : 22 Dec 2004 by Alexey Shchepin <alexey@sevcom.net>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(ejabberd_odbc_sup).
-author('alexey@sevcom.net').
%% API
-export([start_link/1,
init/1,
get_pids/1,
get_random_pid/1
]).
-include("ejabberd.hrl").
-define(DEFAULT_POOL_SIZE, 10).
start_link(Host) ->
supervisor:start_link({local, gen_mod:get_module_proc(Host, ?MODULE)},
?MODULE, [Host]).
init([Host]) ->
N = case ejabberd_config:get_local_option({odbc_pool_size, Host}) of
I when is_integer(I) ->
I;
undefined ->
?DEFAULT_POOL_SIZE;
Other ->
?ERROR_MSG("Wrong odbc_pool_size definition '~p' for host ~p, default to ~p~n",
[Other, Host, ?DEFAULT_POOL_SIZE]),
?DEFAULT_POOL_SIZE
end,
{ok, {{one_for_one, 10, 6},
lists:map(
fun(I) ->
{I,
{ejabberd_odbc, start_link, [Host]},
transient,
brutal_kill,
worker,
[?MODULE]}
end, lists:seq(1, N))}}.
get_pids(Host) ->
Proc = gen_mod:get_module_proc(Host, ?MODULE),
[Child ||
{_Id, Child, _Type, _Modules} <- supervisor:which_children(Proc),
Child /= undefined].
get_random_pid(Host) ->
Pids = get_pids(Host),
lists:nth(erlang:phash(now(), length(Pids)), Pids).
|
