1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2009. All Rights Reserved.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
-module(group_leader).
-behaviour(gen_server).
%% External exports
-export([start_link/0, code_change/3]).
%% Internal exports
-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2]).
start_link() -> gen_server:start_link({local,aa}, ?MODULE, [], []).
%%-----------------------------------------------------------------
%% Callback functions from gen_server
%%-----------------------------------------------------------------
init([]) ->
Self = self(),
Pid = spawn(fun() -> stupid_child(Self) end) ,
receive {Pid, registration_done} -> ok end,
process_flag(trap_exit, true),
{ok,state}.
handle_call(transient, _From, State) ->
X = application:get_all_env(transient),
{reply,X,State}.
handle_cast(transient, State) ->
{noreply, State}.
handle_info(_, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
stupid_child(Parent) ->
register(nisse, self()),
Parent ! {self(), registration_done},
receive
_Msg -> ok
end.
|
