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%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (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.mozilla.org/MPL/
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
%% License for the specific language governing rights and limitations
%% under the License.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developers of the Original Code are LShift Ltd,
%% Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
%%
%% Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
%% Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
%% are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
%% Technologies LLC, and Rabbit Technologies Ltd.
%%
%% Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
%% Ltd. Portions created by Cohesive Financial Technologies LLC are
%% Copyright (C) 2007-2010 Cohesive Financial Technologies
%% LLC. Portions created by Rabbit Technologies Ltd are Copyright
%% (C) 2007-2010 Rabbit Technologies Ltd.
%%
%% All Rights Reserved.
%%
%% Contributor(s): ______________________________________.
%%
-module(rabbit_reader_queue_collector).
-behaviour(gen_server).
-export([start_link/0, register_exclusive_queue/2, delete_all/1, shutdown/1]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {exclusive_queues}).
-include("rabbit.hrl").
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-spec(start_link/0 :: () -> {'ok', pid()}).
-spec(register_exclusive_queue/2 :: (pid(), amqqueue()) -> 'ok').
-spec(delete_all/1 :: (pid()) -> 'ok').
-endif.
%%----------------------------------------------------------------------------
start_link() ->
gen_server:start_link(?MODULE, [], []).
register_exclusive_queue(CollectorPid, Q) ->
gen_server:call(CollectorPid, {register_exclusive_queue, Q}, infinity).
delete_all(CollectorPid) ->
gen_server:call(CollectorPid, delete_all, infinity).
shutdown(CollectorPid) ->
gen_server:call(CollectorPid, shutdown, infinity).
%%----------------------------------------------------------------------------
init([]) ->
{ok, #state{exclusive_queues = dict:new()}}.
%%--------------------------------------------------------------------------
handle_call({register_exclusive_queue, Q}, _From,
State = #state{exclusive_queues = Queues}) ->
MonitorRef = erlang:monitor(process, Q#amqqueue.pid),
{reply, ok,
State#state{exclusive_queues = dict:store(MonitorRef, Q, Queues)}};
handle_call(delete_all, _From,
State = #state{exclusive_queues = ExclusiveQueues}) ->
[rabbit_misc:with_exit_handler(
fun () -> ok end,
fun () ->
erlang:demonitor(MonitorRef),
rabbit_amqqueue:delete(Q, false, false)
end)
|| {MonitorRef, Q} <- dict:to_list(ExclusiveQueues)],
{reply, ok, State};
handle_call(shutdown, _From, State) ->
{stop, normal, ok, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info({'DOWN', MonitorRef, process, _DownPid, _Reason},
State = #state{exclusive_queues = ExclusiveQueues}) ->
{noreply, State#state{exclusive_queues =
dict:erase(MonitorRef, ExclusiveQueues)}}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
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