forked from webmachine/webmachine
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathwebmachine_sup.erl
More file actions
69 lines (57 loc) · 2.25 KB
/
webmachine_sup.erl
File metadata and controls
69 lines (57 loc) · 2.25 KB
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
63
64
65
66
67
68
69
%% @author Justin Sheehy <[email protected]>
%% @author Andy Gross <[email protected]>
%% @copyright 2007-2008 Basho Technologies
%%
%% 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.
%% @doc Supervisor for the webmachine application.
-module(webmachine_sup).
-behaviour(supervisor).
%% External exports
-export([start_link/0, upgrade/0]).
%% supervisor callbacks
-export([init/1]).
-include("webmachine_logger.hrl").
%% @spec start_link() -> ServerRet
%% @doc API for starting the supervisor.
start_link() ->
supervisor:start_link({local, ?MODULE}, ?MODULE, []).
%% @spec upgrade() -> ok
%% @doc Add processes if necessary.
upgrade() ->
{ok, {_, Specs}} = init([]),
Old = sets:from_list(
[Name || {Name, _, _, _} <- supervisor:which_children(?MODULE)]),
New = sets:from_list([Name || {Name, _, _, _, _, _} <- Specs]),
Kill = sets:subtract(Old, New),
sets:fold(fun (Id, ok) ->
supervisor:terminate_child(?MODULE, Id),
supervisor:delete_child(?MODULE, Id),
ok
end, ok, Kill),
[supervisor:start_child(?MODULE, Spec) || Spec <- Specs],
ok.
%% @spec init([]) -> SupervisorTree
%% @doc supervisor callback.
init([]) ->
Router =
{webmachine_router,
{webmachine_router, start_link, []},
permanent, 5000, worker, [webmachine_router]},
LogHandler =
[{webmachine_logger,
{gen_event, start_link, [{local, ?EVENT_LOGGER}]},
permanent, 5000, worker, [dynamic]},
{webmachine_logger_watcher_sup,
{webmachine_logger_watcher_sup, start_link, []},
permanent, 5000, supervisor, [webmachine_logger_watcher_sup]}],
{ok, {{one_for_one, 9, 10}, LogHandler ++ [Router]}}.