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mochiweb_test_sup.erl
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mochiweb_test_sup.erl
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%% @author Mochi Media <dev@mochimedia.com>
%% @copyright 2010 Mochi Media <dev@mochimedia.com>
%% @doc Supervisor for the mochiweb_test application.
-module(mochiweb_test_sup).
-author("Mochi Media <dev@mochimedia.com>").
-behaviour(supervisor).
%% External exports
-export([start_link/0, upgrade/0]).
%% supervisor callbacks
-export([init/1]).
%% @spec start_link() -> ServerRet
%% @doc API for starting the supervisor.
start_link() ->
supervisor:start_link({local, ?MODULE}, ?MODULE, []).
%% @spec upgrade() -> ok
%% @doc Add processes if necessary.
upgrade() ->
{ok, {_, Specs}} = init([]),
Old = sets:from_list(
[Name || {Name, _, _, _} <- supervisor:which_children(?MODULE)]),
New = sets:from_list([Name || {Name, _, _, _, _, _} <- Specs]),
Kill = sets:subtract(Old, New),
sets:fold(fun (Id, ok) ->
supervisor:terminate_child(?MODULE, Id),
supervisor:delete_child(?MODULE, Id),
ok
end, ok, Kill),
[supervisor:start_child(?MODULE, Spec) || Spec <- Specs],
ok.
%% @spec init([]) -> SupervisorTree
%% @doc supervisor callback.
init([]) ->
Web = web_specs(mochiweb_test_web,
case os:getenv("VMC_APP_PORT") of
false -> 9090;
P -> list_to_integer(P)
end),
Processes = [Web],
Strategy = {one_for_one, 10, 10},
{ok,
{Strategy, lists:flatten(Processes)}}.
web_specs(Mod, Port) ->
WebConfig = [{ip, {0,0,0,0}},
{port, Port},
{docroot, mochiweb_test_deps:local_path(["priv", "www"])}],
{Mod,
{Mod, start, [WebConfig]},
permanent, 5000, worker, dynamic}.