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erlang-server.server.mustache Maven / Gradle / Ivy
-module({{packageName}}_server).
-define(DEFAULT_ACCEPTORS_POOLSIZE, 100).
-define(DEFAULT_LOGIC_HANDLER, {{packageName}}_default_logic_handler).
-export([child_spec/2]).
-spec child_spec( ID :: any(), #{
ip => inet:ip_address(),
port => inet:port_number(),
logic_handler => module(),
net_opts => []
}) -> supervisor:child_spec().
child_spec(ID, #{
ip := IP ,
port := Port,
net_opts := NetOpts
} = Params) ->
AcceptorsPool = ?DEFAULT_ACCEPTORS_POOLSIZE,
{Transport, TransportOpts} = get_socket_transport(IP, Port, NetOpts),
LogicHandler = maps:get(logic_handler, Params, ?DEFAULT_LOGIC_HANDLER),
ExtraOpts = maps:get(cowboy_extra_opts, Params, []),
CowboyOpts = get_cowboy_config(LogicHandler, ExtraOpts),
ranch:child_spec({?MODULE, ID}, AcceptorsPool,
Transport, TransportOpts, cowboy_protocol, CowboyOpts).
get_socket_transport(IP, Port, Options) ->
Opts = [
{ip, IP},
{port, Port}
],
case {{packageName}}_utils:get_opt(ssl, Options) of
SslOpts = [_|_] ->
{ranch_ssl, Opts ++ SslOpts};
undefined ->
{ranch_tcp, Opts}
end.
get_cowboy_config(LogicHandler, ExtraOpts) ->
get_cowboy_config(LogicHandler, ExtraOpts, get_default_opts(LogicHandler)).
get_cowboy_config(_LogicHandler, [], Opts) ->
Opts;
get_cowboy_config(LogicHandler, [{env, Env} | Rest], Opts) ->
NewEnv = case proplists:get_value(dispatch, Env) of
undefined -> [get_default_dispatch(LogicHandler) | Env];
_ -> Env
end,
get_cowboy_config(LogicHandler, Rest, store_key(env, NewEnv, Opts));
get_cowboy_config(LogicHandler, [{Key, Value}| Rest], Opts) ->
get_cowboy_config(LogicHandler, Rest, store_key(Key, Value, Opts)).
get_default_dispatch(LogicHandler) ->
Paths = {{packageName}}_router:get_paths(LogicHandler),
{dispatch, cowboy_router:compile(Paths)}.
get_default_opts(LogicHandler) ->
[{env, [get_default_dispatch(LogicHandler)]}].
store_key(Key, Value, Opts) ->
lists:keystore(Key, 1, Opts, {Key, Value}).
