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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 VMware, Inc.
%% Copyright (c) 2007-2012 VMware, Inc. All rights reserved.
%%
-module(test_sup).
-behaviour(supervisor2).
-export([test_supervisor_delayed_restart/0,
init/1, start_child/0]).
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-spec(test_supervisor_delayed_restart/0 :: () -> 'passed').
-endif.
%%----------------------------------------------------------------------------
%% Public API
%%----------------------------------------------------------------------------
test_supervisor_delayed_restart() ->
passed = with_sup(simple_one_for_one_terminate,
fun (SupPid) ->
{ok, _ChildPid} =
supervisor2:start_child(SupPid, []),
test_supervisor_delayed_restart(SupPid)
end),
passed = with_sup(one_for_one, fun test_supervisor_delayed_restart/1).
test_supervisor_delayed_restart(SupPid) ->
ok = ping_child(SupPid),
ok = exit_child(SupPid),
timer:sleep(100),
ok = ping_child(SupPid),
ok = exit_child(SupPid),
timer:sleep(100),
timeout = ping_child(SupPid),
timer:sleep(1010),
ok = ping_child(SupPid),
passed.
with_sup(RestartStrategy, Fun) ->
{ok, SupPid} = supervisor2:start_link(?MODULE, [RestartStrategy]),
Res = Fun(SupPid),
unlink(SupPid),
exit(SupPid, shutdown),
Res.
init([RestartStrategy]) ->
{ok, {{RestartStrategy, 1, 1},
[{test, {test_sup, start_child, []}, {permanent, 1},
16#ffffffff, worker, [test_sup]}]}}.
start_child() ->
{ok, proc_lib:spawn_link(fun run_child/0)}.
ping_child(SupPid) ->
Ref = make_ref(),
with_child_pid(SupPid, fun(ChildPid) -> ChildPid ! {ping, Ref, self()} end),
receive {pong, Ref} -> ok
after 1000 -> timeout
end.
exit_child(SupPid) ->
with_child_pid(SupPid, fun(ChildPid) -> exit(ChildPid, abnormal) end),
ok.
with_child_pid(SupPid, Fun) ->
case supervisor2:which_children(SupPid) of
[{_Id, undefined, worker, [test_sup]}] -> ok;
[{_Id, ChildPid, worker, [test_sup]}] -> Fun(ChildPid);
[] -> ok
end.
run_child() ->
receive {ping, Ref, Pid} -> Pid ! {pong, Ref},
run_child()
end.
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