%% Copyright (c) 2019, Jan Uhlig <[email protected]>
%%
%% Permission to use, copy, modify, and/or distribute this software for any
%% purpose with or without fee is hereby granted, provided that the above
%% copyright notice and this permission notice appear in all copies.
%%
%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-module(ranch_conns_sup_sup).
-behaviour(supervisor).
-export([start_link/4]).
-export([init/1]).
-spec start_link(ranch:ref(), module(), module(), module()) -> {ok, pid()}.
start_link(Ref, Transport, Protocol, Logger) ->
ok = ranch_server:cleanup_connections_sups(Ref),
supervisor:start_link(?MODULE, {
Ref, Transport, Protocol, Logger
}).
-spec init({ranch:ref(), module(), module(), module()})
-> {ok, {supervisor:sup_flags(), [supervisor:child_spec()]}}.
init({Ref, Transport, Protocol, Logger}) ->
TransOpts = ranch_server:get_transport_options(Ref),
NumAcceptors = maps:get(num_acceptors, TransOpts, 10),
NumConnsSups = maps:get(num_conns_sups, TransOpts, NumAcceptors),
ChildSpecs = [#{
id => {ranch_conns_sup, N},
start => {ranch_conns_sup, start_link, [Ref, N, Transport, TransOpts, Protocol, Logger]},
type => supervisor
} || N <- lists:seq(1, NumConnsSups)],
{ok, {#{intensity => 1 + ceil(math:log2(NumConnsSups))}, ChildSpecs}}.
