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+%% This Source Code Form is subject to the terms of the Mozilla Public
+%% License, v. 2.0. If a copy of the MPL was not distributed with this
+%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
+%%
+%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
+%%
+
+-module(rabbit_connection_sup).
+
+%% Supervisor for a (network) AMQP 0-9-1 client connection.
+%%
+%% Supervises
+%%
+%% * rabbit_reader
+%% * Auxiliary process supervisor
+%%
+%% See also rabbit_reader, rabbit_connection_helper_sup.
+
+-behaviour(supervisor2).
+-behaviour(ranch_protocol).
+
+-export([start_link/4, reader/1]).
+
+-export([init/1]).
+
+-include("rabbit.hrl").
+
+%%----------------------------------------------------------------------------
+
+-spec start_link(any(), rabbit_net:socket(), module(), any()) ->
+ {'ok', pid(), pid()}.
+
+start_link(Ref, _Sock, _Transport, _Opts) ->
+ {ok, SupPid} = supervisor2:start_link(?MODULE, []),
+ %% We need to get channels in the hierarchy here so they get shut
+ %% down after the reader, so the reader gets a chance to terminate
+ %% them cleanly. But for 1.0 readers we can't start the real
+ %% ch_sup_sup (because we don't know if we will be 0-9-1 or 1.0) -
+ %% so we add another supervisor into the hierarchy.
+ %%
+ %% This supervisor also acts as an intermediary for heartbeaters and
+ %% the queue collector process, since these must not be siblings of the
+ %% reader due to the potential for deadlock if they are added/restarted
+ %% whilst the supervision tree is shutting down.
+ {ok, HelperSup} =
+ supervisor2:start_child(
+ SupPid,
+ {helper_sup, {rabbit_connection_helper_sup, start_link, []},
+ intrinsic, infinity, supervisor, [rabbit_connection_helper_sup]}),
+ {ok, ReaderPid} =
+ supervisor2:start_child(
+ SupPid,
+ {reader, {rabbit_reader, start_link, [HelperSup, Ref]},
+ intrinsic, ?WORKER_WAIT, worker, [rabbit_reader]}),
+ {ok, SupPid, ReaderPid}.
+
+-spec reader(pid()) -> pid().
+
+reader(Pid) ->
+ hd(supervisor2:find_child(Pid, reader)).
+
+%%--------------------------------------------------------------------------
+
+init([]) ->
+ ?LG_PROCESS_TYPE(connection_sup),
+ {ok, {{one_for_all, 0, 1}, []}}.