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rabbit_shovel_dyn_worker_sup_sup.erl
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rabbit_shovel_dyn_worker_sup_sup.erl
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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 Developer of the Original Code is GoPivotal, Inc.
%% Copyright (c) 2007-2013 GoPivotal, Inc. All rights reserved.
%%
-module(rabbit_shovel_dyn_worker_sup_sup).
-behaviour(mirrored_supervisor).
-export([start_link/0, init/1, adjust_or_start_child/2, stop_child/1]).
-import(rabbit_misc, [pget/2]).
-include_lib("rabbit_common/include/rabbit.hrl").
-define(SUPERVISOR, ?MODULE).
start_link() ->
{ok, Pid} = mirrored_supervisor:start_link({local, ?SUPERVISOR},
?SUPERVISOR, ?MODULE, []),
Shovels = rabbit_runtime_parameters:list_component(<<"shovel">>),
[adjust_or_start_child({pget(vhost, Shovel), pget(name, Shovel)},
pget(value, Shovel)) || Shovel <- Shovels],
{ok, Pid}.
adjust_or_start_child(Name, Def) ->
case child_exists(Name) of
true -> stop_child(Name);
false -> ok
end,
{ok, _Pid} =
mirrored_supervisor:start_child(
?SUPERVISOR,
{Name, {rabbit_shovel_dyn_worker_sup, start_link, [Name, Def]},
transient, ?MAX_WAIT, worker, [rabbit_shovel_dyn_worker_sup]}),
ok.
child_exists(Name) ->
lists:any(fun ({N, _, _, _}) -> N =:= Name end,
mirrored_supervisor:which_children(?SUPERVISOR)).
stop_child(Name) ->
ok = mirrored_supervisor:terminate_child(?SUPERVISOR, Name),
ok = mirrored_supervisor:delete_child(?SUPERVISOR, Name),
rabbit_shovel_status:remove(Name).
%%----------------------------------------------------------------------------
init([]) ->
{ok, {{one_for_one, 3, 10}, []}}.