erlzk

%% 2013-2014 (c) Mega Yu <yuhg2310@gmail.com>
%% 2013-2014 (c) huaban.com <www.huaban.com>
%% 
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%% 
%%    http://www.apache.org/licenses/LICENSE-2.0
%% 
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
-module(erlzk_app).
-behaviour(application).

-export([start/2, stop/1]).
-export([ensure_deps_started/0]).

start(_Type, _Args) ->
    erlzk_sup:start_link().

stop(_State) ->
    ok.

ensure_deps_started() ->
    {ok, Deps} = application:get_key(erlzk, applications),
    true = lists:all(fun ensure_started/1, Deps).

ensure_started(App) ->
    case application:start(App) of
        ok ->
            true;
        {error, {already_started, App}} ->
            true;
        Else ->
            error_logger:error_msg("Couldn't start ~p: ~p", [App, Else]),
            Else
    end.