%%
%% %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_config).
-export([new/1,delete/2,
exist/2,
allow/2,allow/3,
get/2, get/3, get/1,
create/3, create/4, set/3,
set_module_level/3,unset_module_level/2,
get_module_level/1,cache_module_level/2,
level_to_int/1]).
-include("logger_internal.hrl").
new(Name) ->
_ = ets:new(Name,[set,protected,named_table,{write_concurrency,true}]),
ets:whereis(Name).
delete(Tid,Id) ->
ets:delete(Tid,table_key(Id)).
allow(Tid,Level,Module) ->
LevelInt = level_to_int(Level),
case ets:lookup(Tid,Module) of
[{Module,{ModLevel,cached}}] when is_integer(ModLevel),
LevelInt =< ModLevel ->
true;
[{Module,ModLevel}] when is_integer(ModLevel),
LevelInt =< ModLevel ->
true;
[] ->
logger_server:cache_module_level(Module),
allow(Tid,Level);
_ ->
false
end.
allow(Tid,Level) ->
GlobalLevelInt = ets:lookup_element(Tid,?PRIMARY_KEY,2),
level_to_int(Level) =< GlobalLevelInt.
exist(Tid,What) ->
ets:member(Tid,table_key(What)).
get(Tid,What) ->
case ets:lookup(Tid,table_key(What)) of
[{_,_,Config}] ->
{ok,Config};
[{_,_,Config,Module}] ->
{ok,{Module,Config}};
[] ->
{error,{not_found,What}}
end.
get(Tid,What,Level) ->
MS = [{{table_key(What),'$1','$2'}, % primary config
[{'>=','$1',level_to_int(Level)}],
['$2']},
{{table_key(What),'$1','$2','$3'}, % handler config
[{'>=','$1',level_to_int(Level)}],
[{{'$3','$2'}}]}],
case ets:select(Tid,MS) of
[] -> error;
[Data] -> {ok,Data}
end.
create(Tid,What,Module,Config) ->
LevelInt = level_to_int(maps:get(level,Config)),
ets:insert(Tid,{table_key(What),LevelInt,Config,Module}).
create(Tid,What,Config) ->
LevelInt = level_to_int(maps:get(level,Config)),
ets:insert(Tid,{table_key(What),LevelInt,Config}).
set(Tid,What,Config) ->
LevelInt = level_to_int(maps:get(level,Config)),
%% Should do this only if the level has actually changed. Possibly
%% overwrite instead of delete?
case What of
primary ->
_ = ets:select_delete(Tid,[{{'_',{'$1',cached}},
[{'=/=','$1',LevelInt}],
[true]}]),
ok;
_ ->
ok
end,
ets:update_element(Tid,table_key(What),[{2,LevelInt},{3,Config}]),
ok.
set_module_level(Tid,Modules,Level) ->
LevelInt = level_to_int(Level),
[ets:insert(Tid,{Module,LevelInt}) || Module <- Modules],
ok.
%% should possibly overwrite instead of delete?
unset_module_level(Tid,all) ->
MS = [{{'$1','$2'},[{is_atom,'$1'},{is_integer,'$2'}],[true]}],
_ = ets:select_delete(Tid,MS),
ok;
unset_module_level(Tid,Modules) ->
[ets:delete(Tid,Module) || Module <- Modules],
ok.
get_module_level(Tid) ->
MS = [{{'$1','$2'},[{is_atom,'$1'},{is_integer,'$2'}],[{{'$1','$2'}}]}],
Modules = ets:select(Tid,MS),
lists:sort([{M,int_to_level(L)} || {M,L} <- Modules]).
cache_module_level(Tid,Module) ->
GlobalLevelInt = ets:lookup_element(Tid,?PRIMARY_KEY,2),
ets:insert_new(Tid,{Module,{GlobalLevelInt,cached}}),
ok.
get(Tid) ->
{ok,Primary} = get(Tid,primary),
HMS = [{{table_key('$1'),'_','$2','$3'},[],[{{'$1','$3','$2'}}]}],
Handlers = ets:select(Tid,HMS),
Modules = get_module_level(Tid),
{Primary,Handlers,Modules}.
level_to_int(none) -> ?LOG_NONE;
level_to_int(emergency) -> ?EMERGENCY;
level_to_int(alert) -> ?ALERT;
level_to_int(critical) -> ?CRITICAL;
level_to_int(error) -> ?ERROR;
level_to_int(warning) -> ?WARNING;
level_to_int(notice) -> ?NOTICE;
level_to_int(info) -> ?INFO;
level_to_int(debug) -> ?DEBUG;
level_to_int(all) -> ?LOG_ALL.
int_to_level(?LOG_NONE) -> none;
int_to_level(?EMERGENCY) -> emergency;
int_to_level(?ALERT) -> alert;
int_to_level(?CRITICAL) -> critical;
int_to_level(?ERROR) -> error;
int_to_level(?WARNING) -> warning;
int_to_level(?NOTICE) -> notice;
int_to_level(?INFO) -> info;
int_to_level(?DEBUG) -> debug;
int_to_level(?LOG_ALL) -> all.
%%%-----------------------------------------------------------------
%%% Internal
table_key(primary) -> ?PRIMARY_KEY;
table_key(HandlerId) -> {?HANDLER_KEY,HandlerId}.
