| % 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_mrview_update_notifier). |
| |
| -behaviour(gen_event). |
| |
| -export([start_link/1, notify/1]). |
| -export([init/1, terminate/2, handle_event/2, handle_call/2, handle_info/2, code_change/3, stop/1]). |
| |
| -include_lib("couch/include/couch_db.hrl"). |
| |
| start_link(Exec) -> |
| couch_event_sup:start_link(couch_mrview_update, {couch_mrview_update_notifier, make_ref()}, Exec). |
| |
| notify(Event) -> |
| gen_event:notify(couch_mrview_update, Event). |
| |
| stop(Pid) -> |
| couch_event_sup:stop(Pid). |
| |
| init(Fun) -> |
| {ok, Fun}. |
| |
| terminate(_Reason, _State) -> |
| ok. |
| |
| handle_event(Event, Fun) -> |
| Fun(Event), |
| {ok, Fun}. |
| |
| handle_call(_Request, State) -> |
| {ok, ok, State}. |
| |
| handle_info({'EXIT', Pid, Reason}, Pid) -> |
| couch_log:error("View update notification process ~p died: ~p", [Pid, Reason]), |
| remove_handler. |
| |
| code_change(_OldVsn, State, _Extra) -> |
| {ok, State}. |