1 files changed, 77 insertions, 0 deletions
diff --git a/priv/templates/listenapp_app.erl b/priv/templates/listenapp_app.erl
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+++ b/priv/templates/listenapp_app.erl
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+%%%-------------------------------------------------------------------
+%% @copyright {{copyright_holder}} ({{copyright_year}})
+%% @author {{author_name}} <{{author_email}}>
+%% @doc {{appid}} OTP application callback module.
+%% @end
+%%%-------------------------------------------------------------------
+
+-module({{appid}}_app).
+
+-behaviour(application).
+
+-define(APP, {{appid}}).
+
+%% Application callbacks
+-export([start_phase/3, start/2, stop/1]).
+
+-export([config/0, config/1, config/2,
+         start/0, a_start/2]).
+
+%%%===================================================================
+%%% Convenience Functions
+%%%===================================================================
+
+start() ->
+    a_start(?APP, permanent).
+
+config(Key, Default) ->
+    case application:get_env(?APP, Key) of
+        undefined -> Default;
+        {ok, Val} -> Val
+    end.
+
+config(Key) ->
+    case application:get_env(?APP, Key) of
+        undefined -> erlang:error({missing_config, Key});
+        {ok, Val} -> Val
+    end.
+
+config() ->
+    application:get_all_env(?APP).
+
+
+%% ===================================================================
+%% Application callbacks
+%% ===================================================================
+
+start(_StartType, _StartArgs) ->
+    {{appid}}_sup:start_link().
+
+stop(_State) ->
+    ok.
+
+start_phase(listen, _Type, _Args) ->
+    Dispatch = [{'_',
+                 [{'_', {{app}}_http_handler, []}]}
+               ],
+    cowboy:start_listener(http, 100,
+                          cowboy_tcp_transport,
+                          [{port, config(http_listen_port)}],
+                          cowboy_http_protocol,
+                          [{dispatch, Dispatch}]),
+    ok.
+
+%%%===================================================================
+%%% Internal functions
+%%%===================================================================
+
+a_start(App, Type) ->
+    start_ok(App, Type, application:start(App, Type)).
+
+start_ok(_App, _Type, ok) -> ok;
+start_ok(_App, _Type, {error, {already_started, _App}}) -> ok;
+start_ok(App, Type, {error, {not_started, Dep}}) ->
+    ok = a_start(Dep, Type),
+    a_start(App, Type);
+start_ok(App, _Type, {error, Reason}) ->
+    erlang:error({app_start_failed, App, Reason}).