| % 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(couch_log_writer_journald). |
| -behaviour(couch_log_writer). |
| |
| |
| -export([ |
| init/0, |
| terminate/2, |
| write/2 |
| ]). |
| |
| |
| -include("couch_log.hrl"). |
| |
| |
| init() -> |
| {ok, nil}. |
| |
| |
| terminate(_, _St) -> |
| ok. |
| |
| |
| write(Entry, St) -> |
| #log_entry{ |
| level = Level, |
| pid = Pid, |
| msg = Msg, |
| msg_id = MsgId |
| } = Entry, |
| Fmt = "<~B>~s ~p ~s ", |
| Args = [ |
| level_for_journald(Level), |
| node(), |
| Pid, |
| MsgId |
| ], |
| MsgSize = couch_log_config:get(max_message_size), |
| Data = couch_log_trunc_io:format(Fmt, Args, MsgSize), |
| io:format(standard_error, [Data, Msg, "\n"], []), |
| {ok, St}. |
| |
| |
| % log level mapping from sd-daemon(3) |
| % https://www.freedesktop.org/software/systemd/man/sd-daemon.html |
| -spec level_for_journald(atom()) -> integer(). |
| level_for_journald(Level) when is_atom(Level) -> |
| case Level of |
| debug -> 7; |
| info -> 6; |
| notice -> 5; |
| warning -> 4; |
| error -> 3; |
| critical -> 2; |
| alert -> 1; |
| emergency -> 0; |
| _ -> 3 |
| end. |