| % 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(global_changes_config_listener). |
| -behaviour(gen_server). |
| -vsn(1). |
| -behavior(config_listener). |
| |
| |
| -export([ |
| start_link/0 |
| ]). |
| |
| -export([ |
| init/1, |
| terminate/2, |
| handle_call/3, |
| handle_cast/2, |
| handle_info/2, |
| code_change/3 |
| ]). |
| |
| -export([ |
| handle_config_change/5 |
| ]). |
| |
| |
| -define(LISTENER, global_changes_listener). |
| -define(SERVER, global_changes_server). |
| |
| |
| start_link() -> |
| gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). |
| |
| |
| init([]) -> |
| ok = config:listen_for_changes(?MODULE, nil), |
| {ok, nil}. |
| |
| |
| terminate(_, _St) -> |
| ok. |
| |
| |
| handle_call(Msg, _From, St) -> |
| {stop, {invalid_call, Msg}, {invalid_call, Msg}, St}. |
| |
| |
| handle_cast(Msg, St) -> |
| {stop, {invalid_cast, Msg}, St}. |
| |
| |
| handle_info({gen_event_EXIT, {config_listener, ?MODULE}, _Reason}, St) -> |
| erlang:send_after(5000, self(), restart_config_listener), |
| {noreply, St}; |
| handle_info(restart_config_listener, St) -> |
| ok = config:listen_for_changes(?MODULE, St), |
| {noreply, St}; |
| handle_info(_Msg, St) -> |
| {noreply, St}. |
| |
| |
| code_change(_, St, _) -> |
| {ok, St}. |
| |
| |
| handle_config_change("global_changes", "max_event_delay", MaxDelayStr, _, _) -> |
| try list_to_integer(MaxDelayStr) of |
| MaxDelay -> |
| gen_server:cast(?LISTENER, {set_max_event_delay, MaxDelay}) |
| catch error:badarg -> |
| ok |
| end, |
| {ok, nil}; |
| |
| handle_config_change("global_changes", "max_write_delay", MaxDelayStr, _, _) -> |
| try list_to_integer(MaxDelayStr) of |
| MaxDelay -> |
| gen_server:cast(?SERVER, {set_max_write_delay, MaxDelay}) |
| catch error:badarg -> |
| ok |
| end, |
| {ok, nil}; |
| |
| handle_config_change("global_changes", "update_db", "false", _, _) -> |
| gen_server:cast(?LISTENER, {set_update_db, false}), |
| gen_server:cast(?SERVER, {set_update_db, false}), |
| {ok, nil}; |
| |
| handle_config_change("global_changes", "update_db", _, _, _) -> |
| gen_server:cast(?LISTENER, {set_update_db, true}), |
| gen_server:cast(?SERVER, {set_update_db, true}), |
| {ok, nil}; |
| |
| handle_config_change(_, _, _, _, _) -> |
| {ok, nil}. |