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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2018-2019. All Rights Reserved.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
-module(socket_test_logger).
-export([
start/0, start/1,
stop/0,
format/2
]).
-define(QUIET, true).
-define(LIB, socket_test_lib).
-define(LOGGER, ?MODULE).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
start() ->
start(?QUIET).
start(Quiet) ->
case global:whereis_name(?LOGGER) of
Pid when is_pid(Pid) ->
ok;
undefined ->
Self = self(),
Pid = spawn_link(fun() -> init(Self, Quiet) end),
yes = global:register_name(?LOGGER, Pid),
ok
end.
stop() ->
case global:whereis_name(?LOGGER) of
undefined ->
ok;
Pid when is_pid(Pid) ->
global:unregister_name(?LOGGER),
Pid ! {?LOGGER, '$logger', stop},
ok
end.
format(F, []) ->
do_format(F);
format(F, A) ->
do_format(?LIB:f(F, A)).
do_format(Msg) ->
case global:whereis_name(?LOGGER) of
undefined ->
ok;
Pid when is_pid(Pid) ->
Pid ! {?MODULE, '$logger', {msg, Msg}},
ok
end.
init(Parent, Quiet) ->
put(sname, "logger"),
print("[~s][logger] starting~n", [?LIB:formated_timestamp()]),
loop(#{parent => Parent, quiet => Quiet}).
loop(#{parent := Parent,
quiet := Quiet} = State) ->
receive
{'EXIT', Parent, _} ->
print("[~s][logger] parent exit~n", [?LIB:formated_timestamp()]),
exit(normal);
{?MODULE, '$logger', stop} ->
print("[~s][logger] stopping~n", [?LIB:formated_timestamp()]),
exit(normal);
{?MODULE, '$logger', {msg, Msg}} ->
print_str(Quiet, Msg),
loop(State)
end.
print(F, A) ->
print_str(false, ?LIB:f(F, A)).
print_str(Quiet, Str) ->
try
begin
if (Quiet =/= true) -> io:format(user, Str ++ "~n", []);
true -> ok
end,
io:format(Str, [])
end
catch
_:_:_ ->
io:format(user,
"~nFailed Format message:"
"~n~p~n", [Str]),
io:format("~nFailed Format message:"
"~n~p~n", [Str])
end.
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