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0196580 43d2fa5 | 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 | % SPDX-License-Identifier: LicenseRef-Sovereign-Leviathan-SL-AGPL3-001
% Licensing: see LICENSE in the repository root.
%%%-------------------------------------------------------------------
%%% @doc HK-BROWSER plane supervisor: the session registry and the
%%% session pool are two independent children (not one
%%% `simple_one_for_one' supervisor mixing a singleton with dynamic
%%% children, which OTP does not allow) so that neither can take the
%%% other down. `one_for_one': the registry restarting (it holds no
%%% durable state other than in-memory pid mappings, which are
%%% rebuilt as sessions re-register) does not restart live sessions,
%%% and a session-pool restart storm does not restart the registry.
%%% @end
%%%-------------------------------------------------------------------
-module(hk_browser_sup).
-behaviour(supervisor).
-export([start_link/0, init/1]).
start_link() ->
hk_sup_util:start_link_retry(
fun() -> supervisor:start_link({local, ?MODULE}, ?MODULE, []) end).
init([]) ->
SupFlags = #{strategy => one_for_one, intensity => 10, period => 10},
Children = [
#{id => hk_browser_registry,
start => {hk_browser_registry, start_link, []},
restart => permanent,
shutdown => 5000,
type => worker,
modules => [hk_browser_registry]},
#{id => hk_browser_session_sup,
start => {hk_browser_session_sup, start_link, []},
restart => permanent,
shutdown => infinity,
type => supervisor,
modules => [hk_browser_session_sup]}
],
{ok, {SupFlags, Children}}.
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