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% 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_replicator_notifier).
-behaviour(gen_event).
-vsn(1).
% public API
-export([start_link/1, stop/1, notify/1]).
% gen_event callbacks
-export([init/1, terminate/2, code_change/3]).
-export([handle_event/2, handle_call/2, handle_info/2]).
-include_lib("couch/include/couch_db.hrl").
start_link(FunAcc) ->
couch_event_sup:start_link(couch_replication,
{couch_replicator_notifier, make_ref()}, FunAcc).
notify(Event) ->
gen_event:notify(couch_replication, Event).
stop(Pid) ->
couch_event_sup:stop(Pid).
init(FunAcc) ->
{ok, FunAcc}.
terminate(_Reason, _State) ->
ok.
handle_event(Event, Fun) when is_function(Fun, 1) ->
Fun(Event),
{ok, Fun};
handle_event(Event, {Fun, Acc}) when is_function(Fun, 2) ->
Acc2 = Fun(Event, Acc),
{ok, {Fun, Acc2}}.
handle_call(_Msg, State) ->
{ok, ok, State}.
handle_info(_Msg, State) ->
{ok, State}.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
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