103 lines
3.1 KiB
Erlang
103 lines
3.1 KiB
Erlang
%% Copyright (c) 2011-2012 Basho Technologies, Inc. All Rights Reserved.
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%%
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%% This file is provided to you under the Apache License,
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%% Version 2.0 (the "License"); you may not use this file
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%% except in compliance with the License. You may obtain
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%% a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing,
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%% software distributed under the License is distributed on an
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%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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%% KIND, either express or implied. See the License for the
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%% specific language governing permissions and limitations
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%% under the License.
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-define(DEFAULT_TRUNCATION, 4096).
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-define(DEFAULT_TRACER, lager_default_tracer).
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-define(LEVELS,
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[debug, info, notice, warning, error, critical, alert, emergency, none]).
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-define(DEBUG, 128).
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-define(INFO, 64).
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-define(NOTICE, 32).
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-define(WARNING, 16).
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-define(ERROR, 8).
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-define(CRITICAL, 4).
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-define(ALERT, 2).
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-define(EMERGENCY, 1).
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-define(LOG_NONE, 0).
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-define(LEVEL2NUM(Level),
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case Level of
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debug -> ?DEBUG;
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info -> ?INFO;
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notice -> ?NOTICE;
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warning -> ?WARNING;
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error -> ?ERROR;
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critical -> ?CRITICAL;
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alert -> ?ALERT;
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emergency -> ?EMERGENCY
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end).
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-define(NUM2LEVEL(Num),
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case Num of
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?DEBUG -> debug;
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?INFO -> info;
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?NOTICE -> notice;
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?WARNING -> warning;
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?ERROR -> error;
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?CRITICAL -> critical;
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?ALERT -> alert;
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?EMERGENCY -> emergency
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end).
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-define(SHOULD_LOG(Level),
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(lager_util:level_to_num(Level) band element(1, lager_config:get(loglevel, {?LOG_NONE, []}))) /= 0).
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-define(NOTIFY(Level, Pid, Format, Args),
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gen_event:notify(lager_event, {log, lager_msg:new(io_lib:format(Format, Args),
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Level,
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[{pid,Pid},{line,?LINE},{file,?FILE},{module,?MODULE}],
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[])}
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)).
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%% FOR INTERNAL USE ONLY
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%% internal non-blocking logging call
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%% there's some special handing for when we try to log (usually errors) while
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%% lager is still starting.
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-ifdef(TEST).
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-define(INT_LOG(Level, Format, Args),
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case ?SHOULD_LOG(Level) of
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true ->
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?NOTIFY(Level, self(), Format, Args);
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_ ->
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ok
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end).
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-else.
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-define(INT_LOG(Level, Format, Args),
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Self = self(),
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%% do this in a spawn so we don't cause a deadlock calling gen_event:which_handlers
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%% from a gen_event handler
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spawn(fun() ->
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case catch(gen_event:which_handlers(lager_event)) of
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X when X == []; X == {'EXIT', noproc}; X == [lager_backend_throttle] ->
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%% there's no handlers yet or lager isn't running, try again
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%% in half a second.
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timer:sleep(500),
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?NOTIFY(Level, Self, Format, Args);
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_ ->
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case ?SHOULD_LOG(Level) of
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true ->
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?NOTIFY(Level, Self, Format, Args);
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_ ->
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ok
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end
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end
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end)).
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-endif.
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