%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2017. 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(logger).
%% Log interface
-export([emergency/1,emergency/2,emergency/3,
alert/1,alert/2,alert/3,
critical/1,critical/2,critical/3,
error/1,error/2,error/3,
warning/1,warning/2,warning/3,
notice/1,notice/2,notice/3,
info/1,info/2,info/3,
debug/1,debug/2,debug/3]).
-export([log/2,log/3,log/4]).
%% Called by macro
-export([allow/2,macro_log/3,macro_log/4,macro_log/5,add_default_metadata/1]).
%% Configuration
-export([add_handler/3, remove_handler/1,
add_logger_filter/2, add_handler_filter/3,
remove_logger_filter/1, remove_handler_filter/2,
set_module_level/2, reset_module_level/1,
set_logger_config/1, set_logger_config/2,
set_handler_config/2, set_handler_config/3,
get_logger_config/0, get_handler_config/1,
add_handlers/1]).
%% Private configuration
-export([internal_init_logger/0]).
%% Misc
-export([compare_levels/2]).
-export([set_process_metadata/1, update_process_metadata/1,
unset_process_metadata/0, get_process_metadata/0]).
-export([i/0, i/1]).
%% Basic report formatting
-export([format_report/1, format_otp_report/1]).
-export([internal_log/2,filter_stacktrace/2]).
-include("logger_internal.hrl").
-include("logger.hrl").
%%%-----------------------------------------------------------------
%%% Types
-type log() :: #{level:=level(),
msg:={io:format(),[term()]} |
{report,report()} |
{string,unicode:chardata()},
meta:=metadata()}.
-type level() :: emergency | alert | critical | error |
warning | notice | info | debug.
-type report() :: map() | [{atom(),term()}].
-type msg_fun() :: fun((term()) -> {io:format(),[term()]} |
report() |
unicode:chardata()).
-type metadata() :: #{pid => pid(),
gl => pid(),
time => timestamp(),
mfa => {module(),atom(),non_neg_integer()},
file => file:filename(),
line => non_neg_integer(),
term() => term()}.
-type location() :: #{mfa := {module(),atom(),non_neg_integer()},
file := file:filename(),
line := non_neg_integer()}.
-type handler_id() :: atom().
-type filter_id() :: atom().
-type filter() :: {fun((log(),filter_arg()) -> filter_return()),filter_arg()}.
-type filter_arg() :: term().
-type filter_return() :: stop | ignore | log().
-type config() :: #{level => level(),
filter_default => log | stop,
filters => [{filter_id(),filter()}],
formatter => {module(),term()},
term() => term()}.
-type timestamp() :: integer().
-type config_handler() :: {handler, handler_id(), module(), config()}.
-export_type([log/0,level/0,report/0,msg_fun/0,metadata/0,config/0,handler_id/0,
filter_id/0,filter/0,filter_arg/0,filter_return/0, config_handler/0]).
%%%-----------------------------------------------------------------
%%% API
emergency(X) ->
log(emergency,X).
emergency(X,Y) ->
log(emergency,X,Y).
emergency(X,Y,Z) ->
log(emergency,X,Y,Z).
alert(X) ->
log(alert,X).
alert(X,Y) ->
log(alert,X,Y).
alert(X,Y,Z) ->
log(alert,X,Y,Z).
critical(X) ->
log(critical,X).
critical(X,Y) ->
log(critical,X,Y).
critical(X,Y,Z) ->
log(critical,X,Y,Z).
error(X) ->
log(error,X).
error(X,Y) ->
log(error,X,Y).
error(X,Y,Z) ->
log(error,X,Y,Z).
warning(X) ->
log(warning,X).
warning(X,Y) ->
log(warning,X,Y).
warning(X,Y,Z) ->
log(warning,X,Y,Z).
notice(X) ->
log(notice,X).
notice(X,Y) ->
log(notice,X,Y).
notice(X,Y,Z) ->
log(notice,X,Y,Z).
info(X) ->
log(info,X).
info(X,Y) ->
log(info,X,Y).
info(X,Y,Z) ->
log(info,X,Y,Z).
debug(X) ->
log(debug,X).
debug(X,Y) ->
log(debug,X,Y).
debug(X,Y,Z) ->
log(debug,X,Y,Z).
-spec log(Level,StringOrReport) -> ok when
Level :: level(),
StringOrReport :: unicode:chardata() | report().
log(Level, StringOrReport) ->
do_log(Level,StringOrReport,#{}).
-spec log(Level,StringOrReport,Metadata) -> ok when
Level :: level(),
StringOrReport :: unicode:chardata() | report(),
Metadata :: metadata();
(Level,Format,Args) -> ok when
Level :: level(),
Format :: io:format(),
Args ::[term()];
(Level,Fun,FunArgs) -> ok when
Level :: level(),
Fun :: msg_fun(),
FunArgs :: term().
log(Level, StringOrReport, Metadata)
when is_map(Metadata), not is_function(StringOrReport) ->
do_log(Level,StringOrReport,Metadata);
log(Level, FunOrFormat, Args) ->
do_log(Level,{FunOrFormat,Args},#{}).
-spec log(Level,Format, Args, Metadata) -> ok when
Level :: level(),
Format :: io:format(),
Args :: [term()],
Metadata :: metadata();
(Level,Fun,FunArgs,Metadata) -> ok when
Level :: level(),
Fun :: msg_fun(),
FunArgs :: term(),
Metadata :: metadata().
log(Level, FunOrFormat, Args, Metadata) ->
do_log(Level,{FunOrFormat,Args},Metadata).
-spec allow(Level,Module) -> boolean() when
Level :: level(),
Module :: module().
allow(Level,Module) when ?IS_LEVEL(Level), is_atom(Module) ->
logger_config:allow(?LOGGER_TABLE,Level,Module).
-spec macro_log(Location,Level,StringOrReport) -> ok when
Location :: location(),
Level :: level(),
StringOrReport :: unicode:chardata() | report().
macro_log(Location,Level,StringOrReport) ->
log_allowed(Location,Level,StringOrReport,#{}).
-spec macro_log(Location,Level,StringOrReport,Meta) -> ok when
Location :: location(),
Level :: level(),
StringOrReport :: unicode:chardata() | report(),
Meta :: metadata();
(Location,Level,Format,Args) -> ok when
Location :: location(),
Level :: level(),
Format :: io:format(),
Args ::[term()];
(Location,Level,Fun,FunArgs) -> ok when
Location :: location(),
Level :: level(),
Fun :: msg_fun(),
FunArgs :: term().
macro_log(Location,Level,StringOrReport,Meta)
when is_map(Meta), not is_function(StringOrReport) ->
log_allowed(Location,Level,StringOrReport,Meta);
macro_log(Location,Level,FunOrFormat,Args) ->
log_allowed(Location,Level,{FunOrFormat,Args},#{}).
-spec macro_log(Location,Level,Format,Args,Meta) -> ok when
Location :: location(),
Level :: level(),
Format :: io:format(),
Args ::[term()],
Meta :: metadata();
(Location,Level,Fun,FunArgs,Meta) -> ok when
Location :: location(),
Level :: level(),
Fun :: msg_fun(),
FunArgs :: term(),
Meta :: metadata().
macro_log(Location,Level,FunOrFormat,Args,Meta) ->
log_allowed(Location,Level,{FunOrFormat,Args},Meta).
-spec format_otp_report(Report) -> FormatArgs when
Report :: report(),
FormatArgs :: {io:format(),[term()]}.
format_otp_report(#{label:=_,report:=Report}) ->
format_report(Report);
format_otp_report(Report) ->
format_report(Report).
-spec format_report(Report) -> FormatArgs when
Report :: report(),
FormatArgs :: {io:format(),[term()]}.
format_report(Report) when is_map(Report) ->
format_report(maps:to_list(Report));
format_report(Report) when is_list(Report) ->
case lists:flatten(Report) of
[] ->
{"~tp",[[]]};
FlatList ->
case string_p1(FlatList) of
true ->
{"~ts",[FlatList]};
false ->
format_term_list(Report,[],[])
end
end;
format_report(Report) ->
{"~tp",[Report]}.
format_term_list([{Tag,Data}|T],Format,Args) ->
PorS = case string_p(Data) of
true -> "s";
false -> "p"
end,
format_term_list(T,[" ~tp: ~t"++PorS|Format],[Data,Tag|Args]);
format_term_list([Data|T],Format,Args) ->
format_term_list(T,[" ~tp"|Format],[Data|Args]);
format_term_list([],Format,Args) ->
{lists:flatten(lists:join($\n,lists:reverse(Format))),lists:reverse(Args)}.
string_p(List) when is_list(List) ->
string_p1(lists:flatten(List));
string_p(_) ->
false.
string_p1([]) ->
false;
string_p1(FlatList) ->
io_lib:printable_unicode_list(FlatList).
internal_log(Level,Term) when is_atom(Level) ->
erlang:display_string("Logger - "++ atom_to_list(Level) ++ ": "),
erlang:display(Term).
%%%-----------------------------------------------------------------
%%% Configuration
-spec add_logger_filter(FilterId,Filter) -> ok | {error,term()} when
FilterId :: filter_id(),
Filter :: filter().
add_logger_filter(FilterId,Filter) ->
logger_server:add_filter(logger,{FilterId,Filter}).
-spec add_handler_filter(HandlerId,FilterId,Filter) -> ok | {error,term()} when
HandlerId :: handler_id(),
FilterId :: filter_id(),
Filter :: filter().
add_handler_filter(HandlerId,FilterId,Filter) ->
logger_server:add_filter(HandlerId,{FilterId,Filter}).
-spec remove_logger_filter(FilterId) -> ok | {error,term()} when
FilterId :: filter_id().
remove_logger_filter(FilterId) ->
logger_server:remove_filter(logger,FilterId).
-spec remove_handler_filter(HandlerId,FilterId) -> ok | {error,term()} when
HandlerId :: handler_id(),
FilterId :: filter_id().
remove_handler_filter(HandlerId,FilterId) ->
logger_server:remove_filter(HandlerId,FilterId).
-spec add_handler(HandlerId,Module,Config) -> ok | {error,term()} when
HandlerId :: handler_id(),
Module :: module(),
Config :: config().
add_handler(HandlerId,Module,Config) ->
logger_server:add_handler(HandlerId,Module,Config).
-spec remove_handler(HandlerId) -> ok | {error,term()} when
HandlerId :: handler_id().
remove_handler(HandlerId) ->
logger_server:remove_handler(HandlerId).
-spec set_logger_config(Key,Value) -> ok | {error,term()} when
Key :: atom(),
Value :: term().
set_logger_config(Key,Value) ->
logger_server:set_config(logger,Key,Value).
-spec set_logger_config(Config) -> ok | {error,term()} when
Config :: config().
set_logger_config(Config) ->
logger_server:set_config(logger,Config).
-spec set_handler_config(HandlerId,Key,Value) -> ok | {error,term()} when
HandlerId :: handler_id(),
Key :: atom(),
Value :: term().
set_handler_config(HandlerId,Key,Value) ->
logger_server:set_config(HandlerId,Key,Value).
-spec set_handler_config(HandlerId,Config) -> ok | {error,term()} when
HandlerId :: handler_id(),
Config :: config().
set_handler_config(HandlerId,Config) ->
logger_server:set_config(HandlerId,Config).
-spec get_logger_config() -> {ok,Config} when
Config :: config().
get_logger_config() ->
{ok,Config} = logger_config:get(?LOGGER_TABLE,logger),
{ok,maps:remove(handlers,Config)}.
-spec get_handler_config(HandlerId) -> {ok,{Module,Config}} | {error,term()} when
HandlerId :: handler_id(),
Module :: module(),
Config :: config().
get_handler_config(HandlerId) ->
logger_config:get(?LOGGER_TABLE,HandlerId).
-spec set_module_level(Module,Level) -> ok | {error,term()} when
Module :: module(),
Level :: level().
set_module_level(Module,Level) ->
logger_server:set_module_level(Module,Level).
-spec reset_module_level(Module) -> ok | {error,term()} when
Module :: module().
reset_module_level(Module) ->
logger_server:reset_module_level(Module).
%%%-----------------------------------------------------------------
%%% Misc
-spec compare_levels(Level1,Level2) -> eq | gt | lt when
Level1 :: level(),
Level2 :: level().
compare_levels(Level,Level) when ?IS_LEVEL(Level) ->
eq;
compare_levels(Level1,Level2) when ?IS_LEVEL(Level1), ?IS_LEVEL(Level2) ->
Int1 = logger_config:level_to_int(Level1),
Int2 = logger_config:level_to_int(Level2),
if Int1 < Int2 -> gt;
true -> lt
end;
compare_levels(Level1,Level2) ->
erlang:error(badarg,[Level1,Level2]).
-spec set_process_metadata(Meta) -> ok when
Meta :: metadata().
set_process_metadata(Meta) when is_map(Meta) ->
_ = put(?LOGGER_META_KEY,Meta),
ok;
set_process_metadata(Meta) ->
erlang:error(badarg,[Meta]).
-spec update_process_metadata(Meta) -> ok when
Meta :: metadata().
update_process_metadata(Meta) when is_map(Meta) ->
case get_process_metadata() of
undefined ->
set_process_metadata(Meta);
Meta0 when is_map(Meta0) ->
set_process_metadata(maps:merge(Meta0,Meta)),
ok
end;
update_process_metadata(Meta) ->
erlang:error(badarg,[Meta]).
-spec get_process_metadata() -> Meta | undefined when
Meta :: metadata().
get_process_metadata() ->
get(?LOGGER_META_KEY).
-spec unset_process_metadata() -> ok.
unset_process_metadata() ->
_ = erase(?LOGGER_META_KEY),
ok.
-spec i() -> #{logger=>config(),
handlers=>[{handler_id(),module(),config()}],
module_levels=>[{module(),level()}]}.
i() ->
i(term).
-spec i(term) -> #{logger=>config(),
handlers=>[{handler_id(),module(),config()}],
module_levels=>[{module(),level()}]};
(print) -> ok;
(string) -> iolist().
i(_Action = print) ->
io:put_chars(i(string));
i(_Action = string) ->
#{logger := #{level := Level,
filters := Filters,
filter_default := FilterDefault},
handlers := HandlerConfigs,
module_levels := Modules} = i(term),
[io_lib:format("Current logger configuration:~n", []),
io_lib:format(" Level: ~p~n",[Level]),
io_lib:format(" Filter Default: ~p~n", [FilterDefault]),
io_lib:format(" Filters: ~n", []),
print_filters(4, Filters),
io_lib:format(" Handlers: ~n", []),
print_handlers(HandlerConfigs),
io_lib:format(" Level set per module: ~n", []),
print_module_levels(Modules)
];
i(_Action = term) ->
{Logger, Handlers, Modules} = logger_config:get(tid()),
#{logger=>maps:remove(handlers,Logger),
handlers=>lists:keysort(1,Handlers),
module_levels=>lists:keysort(1,Modules)}.
print_filters(Indent, {Id, {Fun, Config}}) ->
io_lib:format("~sId: ~p~n"
"~s Fun: ~p~n"
"~s Config: ~p~n",[Indent, Id, Indent, Fun, Indent, Config]);
print_filters(Indent, Filters) ->
IndentStr = io_lib:format("~.*s",[Indent, ""]),
lists:map(fun(Filter) ->print_filters(IndentStr, Filter) end, Filters).
print_handlers({Id,Module,
#{level := Level,
filters := Filters, filter_default := FilterDefault,
formatter := {FormatterModule,FormatterConfig}} = Config}) ->
MyKeys = [filter_default, filters, formatter, level, id],
UnhandledConfig = maps:filter(fun(Key, _) ->
not lists:member(Key, MyKeys)
end, Config),
Unhandled = lists:map(fun({Key, Value}) ->
io_lib:format(" ~p: ~p~n",[Key, Value])
end, maps:to_list(UnhandledConfig)),
io_lib:format(" Id: ~p~n"
" Module: ~p~n"
" Level: ~p~n"
" Formatter:~n"
" Module: ~p~n"
" Config: ~p~n"
" Filter Default: ~p~n"
" Filters:~n~s"
" Handler Config:~n"
"~s"
"",[Id, Module, Level, FormatterModule, FormatterConfig,
FilterDefault, print_filters(8, Filters), Unhandled]);
print_handlers(Handlers) ->
lists:map(fun print_handlers/1, Handlers).
print_module_levels({Module,Level}) ->
io_lib:format(" Module: ~p~n"
" Level: ~p~n",
[Module,Level]);
print_module_levels(ModuleLevels) ->
lists:map(fun print_module_levels/1, ModuleLevels).
-spec internal_init_logger() -> ok | {error,term()}.
%% This function is responsible for config of the logger
%% This is done before add_handlers because we want the
%% logger settings to take effect before the kernel supervisor
%% tree is started.
internal_init_logger() ->
try
ok = logger:set_logger_config(level, get_logger_level()),
ok = logger:set_logger_config(filter_default, get_logger_filter_default()),
[case logger:add_logger_filter(Id, Filter) of
ok -> ok;
{error, Reason} -> throw(Reason)
end || {Id, Filter} <- get_logger_filters()],
_ = [[case logger:set_module_level(Module, Level) of
ok -> ok;
{error, Reason} -> throw(Reason)
end || Module <- Modules]
|| {module_level, Level, Modules} <- get_logger_env()],
case logger:set_handler_config(logger_simple,filters,
get_default_handler_filters()) of
ok -> ok;
{error,{not_found,logger_simple}} -> ok
end,
init_kernel_handlers()
catch throw:Reason ->
?LOG_ERROR("Invalid logger config: ~p", [Reason]),
{error, {bad_config, {kernel, Reason}}}
end.
-spec init_kernel_handlers() -> ok | {error,term()}.
%% Setup the kernel environment variables to be correct
%% The actual handlers are started by a call to add_handlers.
init_kernel_handlers() ->
try
case get_logger_type() of
{ok,silent} ->
ok = logger:remove_handler(logger_simple);
{ok,false} ->
ok;
{ok,Type} ->
init_default_config(Type)
end
catch throw:Reason ->
?LOG_ERROR("Invalid default handler config: ~p", [Reason]),
{error, {bad_config, {kernel, Reason}}}
end.
-spec add_handlers(Application) -> ok | {error,term()} when
Application :: atom();
(HandlerConfig) -> ok | {error,term()} when
HandlerConfig :: [config_handler()].
%% This function is responsible for resolving the handler config
%% and then starting the correct handlers. This is done after the
%% kernel supervisor tree has been started as it needs the logger_sup.
add_handlers(App) when is_atom(App) ->
add_handlers(application:get_env(App, logger, []));
add_handlers(HandlerConfig) ->
try
check_logger_config(HandlerConfig),
DefaultAdded =
lists:foldl(
fun({handler, default = Id, Module, Config}, _)
when not is_map_key(filters, Config) ->
%% The default handler should have a couple of extra filters
%% set on it by default.
DefConfig = #{ filter_default => stop,
filters => get_default_handler_filters()},
setup_handler(Id, Module, maps:merge(DefConfig,Config)),
true;
({handler, Id, Module, Config}, Default) ->
setup_handler(Id, Module, Config),
Default orelse Id == default;
(_, Default) -> Default
end, false, HandlerConfig),
%% If a default handler was added we try to remove the simple_logger
%% If the simple logger exists it will replay its log events
%% to the handler(s) added in the fold above.
_ = [case logger:remove_handler(logger_simple) of
ok -> ok;
{error,{not_found,logger_simple}} -> ok
end || DefaultAdded],
ok
catch throw:Reason ->
?LOG_ERROR("Invalid logger handler config: ~p", [Reason]),
{error, {bad_config, {handler, Reason}}}
end.
setup_handler(Id, Module, Config) ->
case logger:add_handler(Id, Module, Config) of
ok -> ok;
{error, Reason} -> throw(Reason)
end.
check_logger_config(_) ->
ok.
-spec get_logger_type() -> {ok, standard_io | false | silent |
{file, file:name_all()} |
{file, file:name_all(), [file:mode()]}}.
get_logger_type() ->
case application:get_env(kernel, error_logger) of
{ok, tty} ->
{ok, standard_io};
{ok, {file, File}} when is_list(File) ->
{ok, {file, File}};
{ok, {file, File, Modes}} when is_list(File), is_list(Modes) ->
{ok, {file, File, Modes}};
{ok, false} ->
{ok, false};
{ok, silent} ->
{ok, silent};
undefined ->
case lists:member({handler,default,undefined}, get_logger_env()) of
true ->
{ok, false};
false ->
{ok, standard_io} % default value
end;
{ok, Bad} ->
throw({error_logger, Bad})
end.
get_logger_level() ->
case application:get_env(kernel,logger_level,info) of
Level when ?IS_LEVEL(Level) ->
Level;
Level ->
throw({logger_level, Level})
end.
get_logger_filter_default() ->
case lists:keyfind(filters,1,get_logger_env()) of
{filters,Default,_} ->
Default;
false ->
log
end.
get_logger_filters() ->
lists:foldl(
fun({filters, _, Filters}, _Acc) ->
Filters;
(_, Acc) ->
Acc
end, [], get_logger_env()).
%% This function looks at the kernel logger environment
%% and updates it so that the correct logger is configured
init_default_config(Type) when Type==standard_io;
Type==standard_error;
element(1,Type)==file ->
Env = get_logger_env(),
DefaultConfig = #{logger_std_h=>#{type=>Type}},
NewLoggerEnv =
case lists:keyfind(default, 2, Env) of
{handler, default, Module, Config} ->
lists:map(
fun({handler, default, logger_std_h, _}) ->
%% Only want to add the logger_std_h config
%% if not configured by user AND the default
%% handler is still the logger_std_h.
{handler, default, Module, maps:merge(DefaultConfig,Config)};
(Other) ->
Other
end, Env);
_ ->
%% Nothing has been configured, use default
[{handler, default, logger_std_h, DefaultConfig} | Env]
end,
application:set_env(kernel, logger, NewLoggerEnv, [{timeout,infinity}]);
init_default_config(Type) ->
throw({illegal_logger_type,Type}).
get_default_handler_filters() ->
case application:get_env(kernel, logger_sasl_compatible, false) of
true ->
?DEFAULT_HANDLER_FILTERS([beam,erlang,otp]);
false ->
Extra =
case application:get_env(kernel, logger_log_progress, false) of
true ->
[];
false ->
[{stop_progress,
{fun logger_filters:progress/2,stop}}]
end,
Extra ++ ?DEFAULT_HANDLER_FILTERS([beam,erlang,otp,sasl])
end.
get_logger_env() ->
application:get_env(kernel, logger, []).
%%%-----------------------------------------------------------------
%%% Internal
do_log(warning,Msg,Meta) ->
do_log_1(error_logger:warning_map(),Msg,Meta);
do_log(Level,Msg,Meta) ->
do_log_1(Level,Msg,Meta).
do_log_1(Level,Msg,#{mfa:={Module,_,_}}=Meta) ->
case logger_config:allow(?LOGGER_TABLE,Level,Module) of
true ->
log_allowed(#{},Level,Msg,Meta);
false ->
ok
end;
do_log_1(Level,Msg,Meta) ->
case logger_config:allow(?LOGGER_TABLE,Level) of
true ->
log_allowed(#{},Level,Msg,Meta);
false ->
ok
end.
-spec log_allowed(Location,Level,Msg,Meta) -> ok when
Location :: location() | #{},
Level :: level(),
Msg :: {msg_fun(),term()} |
{io:format(),[term()]} |
report() |
unicode:chardata(),
Meta :: metadata().
log_allowed(Location,Level,{Fun,FunArgs},Meta) when is_function(Fun,1) ->
try Fun(FunArgs) of
Msg={Format,Args} when is_list(Format), is_list(Args) ->
log_allowed(Location,Level,Msg,Meta);
Report when ?IS_REPORT(Report) ->
log_allowed(Location,Level,Report,Meta);
String when ?IS_STRING(String) ->
log_allowed(Location,Level,String,Meta);
Other ->
log_allowed(Location,Level,
{"LAZY_FUN ERROR: ~tp; Returned: ~tp",
[{Fun,FunArgs},Other]},
Meta)
catch C:R ->
log_allowed(Location,Level,
{"LAZY_FUN CRASH: ~tp; Reason: ~tp",
[{Fun,FunArgs},{C,R}]},
Meta)
end;
log_allowed(Location,Level,Msg,Meta0) when is_map(Meta0) ->
%% Metadata priorities are:
%% Location (added in API macros) - will be overwritten by process
%% metadata (set by set_process_metadata/1), which in turn will be
%% overwritten by the metadata given as argument in the log call
%% (function or macro).
Meta = add_default_metadata(
maps:merge(Location,maps:merge(proc_meta(),Meta0))),
case node(maps:get(gl,Meta)) of
Node when Node=/=node() ->
log_remote(Node,Level,Msg,Meta),
do_log_allowed(Level,Msg,Meta);
_ ->
do_log_allowed(Level,Msg,Meta)
end.
do_log_allowed(Level,{Format,Args}=Msg,Meta)
when ?IS_LEVEL(Level),
is_list(Format),
is_list(Args),
is_map(Meta) ->
logger_backend:log_allowed(#{level=>Level,msg=>Msg,meta=>Meta},tid());
do_log_allowed(Level,Report,Meta)
when ?IS_LEVEL(Level),
?IS_REPORT(Report),
is_map(Meta) ->
logger_backend:log_allowed(#{level=>Level,msg=>{report,Report},meta=>Meta},
tid());
do_log_allowed(Level,String,Meta)
when ?IS_LEVEL(Level),
?IS_STRING(String),
is_map(Meta) ->
logger_backend:log_allowed(#{level=>Level,msg=>{string,String},meta=>Meta},
tid()).
tid() ->
ets:whereis(?LOGGER_TABLE).
log_remote(Node,Level,{Format,Args},Meta) ->
log_remote(Node,{log,Level,Format,Args,Meta});
log_remote(Node,Level,Msg,Meta) ->
log_remote(Node,{log,Level,Msg,Meta}).
log_remote(Node,Request) ->
{logger,Node} ! Request,
ok.
add_default_metadata(Meta) ->
add_default_metadata([pid,gl,time],Meta).
add_default_metadata([Key|Keys],Meta) ->
case maps:is_key(Key,Meta) of
true ->
add_default_metadata(Keys,Meta);
false ->
add_default_metadata(Keys,Meta#{Key=>default(Key)})
end;
add_default_metadata([],Meta) ->
Meta.
proc_meta() ->
case get_process_metadata() of
ProcMeta when is_map(ProcMeta) -> ProcMeta;
_ -> #{}
end.
default(pid) -> self();
default(gl) -> group_leader();
default(time) -> erlang:monotonic_time(microsecond).
%% Remove everything upto and including this module from the stacktrace
filter_stacktrace(Module,[{Module,_,_,_}|_]) ->
[];
filter_stacktrace(Module,[H|T]) ->
[H|filter_stacktrace(Module,T)];
filter_stacktrace(_,[]) ->
[].
