| % 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_config_listener). |
| -behaviour(config_listener). |
| |
| |
| -export([ |
| start/0 |
| ]). |
| |
| -export([ |
| handle_config_change/5, |
| handle_config_terminate/3 |
| ]). |
| |
| |
| -ifdef(TEST). |
| -define(RELISTEN_DELAY, 500). |
| -else. |
| -define(RELISTEN_DELAY, 5000). |
| -endif. |
| |
| |
| start() -> |
| ok = config:listen_for_changes(?MODULE, nil). |
| |
| |
| handle_config_change("log", Key, _, _, _) -> |
| case Key of |
| "level" -> |
| couch_log_config:reconfigure(); |
| "max_message_size" -> |
| couch_log_config:reconfigure(); |
| _ -> |
| % Someone may have changed the config for |
| % the writer so we need to re-initialize. |
| couch_log_server:reconfigure() |
| end, |
| notify_listeners(), |
| {ok, nil}; |
| |
| handle_config_change(_, _, _, _, Settings) -> |
| {ok, Settings}. |
| |
| |
| handle_config_terminate(_, stop, _) -> |
| ok; |
| handle_config_terminate(_, _, _) -> |
| spawn(fun() -> |
| timer:sleep(?RELISTEN_DELAY), |
| ok = config:listen_for_changes(?MODULE, nil) |
| end). |
| |
| |
| -ifdef(TEST). |
| notify_listeners() -> |
| Listeners = application:get_env(couch_log, config_listeners, []), |
| lists:foreach(fun(L) -> |
| L ! couch_log_config_change_finished |
| end, Listeners). |
| -else. |
| notify_listeners() -> |
| ok. |
| -endif. |