| % 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_event_os_listener). |
| -behaviour(gen_server). |
| -vsn(1). |
| |
| |
| -export([ |
| start_link/1 |
| ]). |
| |
| -export([ |
| init/1, |
| terminate/2, |
| handle_call/3, |
| handle_cast/2, |
| handle_info/2, |
| code_change/3 |
| ]). |
| |
| |
| start_link(Exe) when is_list(Exe) -> |
| gen_server:start_link(?MODULE, Exe, []). |
| |
| |
| init(Exe) -> |
| process_flag(trap_exit, true), |
| ok = couch_event:register_all(self()), |
| couch_os_process:start_link(Exe, []). |
| |
| |
| terminate(_Reason, Pid) when is_pid(Pid) -> |
| couch_os_process:stop(Pid); |
| terminate(_Reason, _Pid) -> |
| ok. |
| |
| |
| handle_call(Msg, From, Pid) -> |
| couch_log:notice("~s ignoring call ~w from ~w", [?MODULE, Msg, From]), |
| {reply, ignored, Pid, 0}. |
| |
| |
| handle_cast(Msg, Pid) -> |
| couch_log:notice("~s ignoring cast ~w", [?MODULE, Msg]), |
| {noreply, Pid, 0}. |
| |
| |
| handle_info({'$couch_event', DbName, Event}, Pid) -> |
| Obj = {[ |
| {db, DbName}, |
| {type, list_to_binary(atom_to_list(Event))} |
| ]}, |
| ok = couch_os_process:send(Pid, Obj), |
| {noreply, Pid}; |
| |
| handle_info({'EXIT', Pid, Reason}, Pid) -> |
| couch_log:error("Update notificatio process ~w died: ~w", [Pid, Reason]), |
| {stop, normal, nil}; |
| |
| handle_info(Msg, Pid) -> |
| couch_log:notice("~s ignoring info ~w", [?MODULE, Msg]), |
| {noreply, Pid, 0}. |
| |
| |
| code_change(_OldVsn, St, _Extra) -> |
| {ok, St}. |