<commit_before>%% @author <NAME>
%%   [www.csproj13.student.it.uu.se]
%% @version 1.0
%% @copyright [Copyright information]

%% @doc Supervisor for the engine application.

-module(engine_sup).
-author('author <<EMAIL>>').

-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([]) ->
    Ip = case os:getenv("WEBMACHINE_IP") of false -> "0.0.0.0"; Any -> Any end,
    {ok, App} = application:get_application(?MODULE),
    {ok, Dispatch} = file:consult(filename:join([priv_dir(App),
                                                 "dispatch.conf"])),
    Port = case os:getenv("WEBMACHINE_PORT") of
            false -> 8000;
            AnyPort -> AnyPort
          end,
    WebConfig = [
                 {ip, Ip},
                 {port, Port},
                 {log_dir, "priv/log"},
                 {dispatch, Dispatch}],
    Web = {webmachine_mochiweb,
           {webmachine_mochiweb, start, [WebConfig]},
           permanent, 5000, worker, [mochiweb_socket_server]},
    Processes = [Web],
    {ok, { {one_for_one, 10, 10}, Processes} }.

%%
%% @doc return the priv dir
priv_dir(Mod) ->
    case code:priv_dir(Mod) of
        {error, bad_name} ->
            Ebin = filename:dirname(code:which(Mod)),
            filename:join(filename:dirname(Ebin), "priv");
        PrivDir ->
            PrivDir
    end.<commit_msg>Changed so that webmachine functionality is using the variables set in the engine.config config file<commit_after>%% @author <NAME>
%%   [www.csproj13.student.it.uu.se]
%% @version 1.0
%% @copyright [Copyright information]

%% @doc Supervisor for the engine application.

-module(engine_sup).
-author('author <<EMAIL>>').

-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([]) ->
    Ip = case os:getenv("WEBMACHINE_IP") of false -> "0.0.0.0"; Any -> Any end,
    {ok, App} = application:get_application(?MODULE),
    {ok, Dispatch} = file:consult(filename:join([priv_dir(App),
                                                 "dispatch.conf"])),
    Port = case application:get_env(engine, webmachine_port) of
	       undefined -> 8000;
	       {ok, AnyPort} -> AnyPort
           end,
    LogDir = case application:get_env(engine, webmachine_log_dir) of
		 undefined -> "priv/log";
		 {ok, AnyDir} -> AnyDir
	     end,
    		 
    WebConfig = [
                 {ip, Ip},
                 {port, Port},
                 {log_dir, LogDir},
                 {dispatch, Dispatch}],
    Web = {webmachine_mochiweb,
           {webmachine_mochiweb, start, [WebConfig]},
           permanent, 5000, worker, [mochiweb_socket_server]},
    Processes = [Web],
    {ok, { {one_for_one, 10, 10}, Processes} }.

%%
%% @doc return the priv dir
priv_dir(Mod) ->
    case code:priv_dir(Mod) of
        {error, bad_name} ->
            Ebin = filename:dirname(code:which(Mod)),
            filename:join(filename:dirname(Ebin), "priv");
        PrivDir ->
            PrivDir
    end.
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