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|
%%%----------------------------------------------------------------------
%%% File : ejabberd_loglevel.erl
%%% Author : Mickael Remond <mremond@process-one.net>
%%% Purpose : Loglevel switcher.
%%% Be careful: you should not have any ejabberd_logger module
%%% as ejabberd_loglevel switcher is compiling and loading
%%% dynamically a "virtual" ejabberd_logger module (Described
%%% in a string at the end of this module).
%%% Created : 29 Nov 2006 by Mickael Remond <mremond@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2009 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with this program; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(ejabberd_loglevel).
-author('mickael.remond@process-one.net').
-export([set/1]).
-include("ejabberd.hrl").
-define(LOGMODULE, "error_logger").
%% Error levels:
-define(LOG_LEVELS,[ {0, no_log, "No log"}
,{1, critical, "Critical"}
,{2, error, "Error"}
,{3, warning, "Warning"}
,{4, info, "Info"}
,{5, debug, "Debug"}
]).
set(LogLevel) when is_atom(LogLevel) ->
set(level_to_integer(LogLevel));
set(Loglevel) when is_integer(Loglevel) ->
try
{Mod,Code} = dynamic_compile:from_string(ejabberd_logger_src(Loglevel)),
code:load_binary(Mod, ?LOGMODULE ++ ".erl", Code)
catch
Type:Error -> ?CRITICAL_MSG("Error compiling logger (~p): ~p~n", [Type, Error])
end;
set(_) ->
exit("Loglevel must be an integer").
level_to_integer(Level) ->
case lists:keysearch(Level, 2, ?LOG_LEVELS) of
{value, {Int, Level, _Desc}} -> Int;
_ -> erlang:error({no_such_loglevel, Level})
end.
%% --------------------------------------------------------------
%% Code of the ejabberd logger, dynamically compiled and loaded
%% This allows to dynamically change log level while keeping a
%% very efficient code.
ejabberd_logger_src(Loglevel) ->
L = integer_to_list(Loglevel),
"-module(ejabberd_logger).
-author('mickael.remond@process-one.net').
-export([debug_msg/4,
info_msg/4,
warning_msg/4,
error_msg/4,
critical_msg/4]).
%% Helper functions
debug_msg(Module, Line, Format, Args) when " ++ L ++ " >= 5 ->
notify(info_msg,
\"D(~p:~p:~p) : \"++Format++\"~n\",
[self(), Module, Line]++Args);
debug_msg(_,_,_,_) -> ok.
info_msg(Module, Line, Format, Args) when " ++ L ++ " >= 4 ->
notify(info_msg,
\"I(~p:~p:~p) : \"++Format++\"~n\",
[self(), Module, Line]++Args);
info_msg(_,_,_,_) -> ok.
warning_msg(Module, Line, Format, Args) when " ++ L ++ " >= 3 ->
notify(error,
\"W(~p:~p:~p) : \"++Format++\"~n\",
[self(), Module, Line]++Args);
warning_msg(_,_,_,_) -> ok.
error_msg(Module, Line, Format, Args) when " ++ L ++ " >= 2 ->
notify(error,
\"E(~p:~p:~p) : \"++Format++\"~n\",
[self(), Module, Line]++Args);
error_msg(_,_,_,_) -> ok.
critical_msg(Module, Line, Format, Args) when " ++ L ++ " >= 1 ->
notify(error,
\"C(~p:~p:~p) : \"++Format++\"~n\",
[self(), Module, Line]++Args);
critical_msg(_,_,_,_) -> ok.
%% Distribute the message to the Erlang error logger
notify(Type, Format, Args) ->
LoggerMsg = {Type, group_leader(), {self(), Format, Args}},
gen_event:notify(error_logger, LoggerMsg).
".
|
