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% Copyright 2011 Cloudant
%
% 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(twig).
-export([log/2, log/3, log/4, set_level/1]).
-include("twig_int.hrl").
set_level(LevelAtom) ->
application:set_env(twig, level, twig_util:level(LevelAtom)).
log(LevelAtom, String) ->
log(LevelAtom, String, [], []).
log(LevelAtom, Format, Data) ->
log(LevelAtom, Format, Data, []).
log(LevelAtom, Format, Data, _Options) ->
%% TODO do something useful with options
Level = twig_util:level(LevelAtom),
case application:get_env(twig, level) of
{ok, Threshold} when Level =< Threshold ->
send_message(Level, Format, Data);
undefined when Level =< ?LEVEL_INFO ->
send_message(Level, Format, Data);
_ ->
ok
end.
%% internal
send_message(Level, Format, Data) ->
gen_event:sync_notify(error_logger, format(Level, Format, Data)).
format(Level, Format, Data) ->
%% TODO truncate large messages
#twig{
level = Level,
msg = iolist_to_binary(twig_util:format(Format, Data)),
msgid = erlang:get(nonce),
pid = self()
}.
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