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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_channel_sup).
%% Supervises processes that implement AMQP 0-9-1 channels:
%%
%% * Channel process itself
%% * Network writer (for network connections)
%% * Limiter (handles channel QoS and flow control)
%%
%% Every rabbit_channel_sup is supervised by rabbit_channel_sup_sup.
%%
%% See also rabbit_channel, rabbit_writer, rabbit_limiter.
-behaviour(supervisor2).
-export([start_link/1]).
-export([init/1]).
-include("rabbit.hrl").
%%----------------------------------------------------------------------------
-export_type([start_link_args/0]).
-type start_link_args() ::
{'tcp', rabbit_net:socket(), rabbit_channel:channel_number(),
non_neg_integer(), pid(), string(), rabbit_types:protocol(),
rabbit_types:user(), rabbit_types:vhost(), rabbit_framing:amqp_table(),
pid()} |
{'direct', rabbit_channel:channel_number(), pid(), string(),
rabbit_types:protocol(), rabbit_types:user(), rabbit_types:vhost(),
rabbit_framing:amqp_table(), pid()}.
-define(FAIR_WAIT, 70000).
%%----------------------------------------------------------------------------
-spec start_link(start_link_args()) -> {'ok', pid(), {pid(), any()}}.
start_link({tcp, Sock, Channel, FrameMax, ReaderPid, ConnName, Protocol, User,
VHost, Capabilities, Collector}) ->
{ok, SupPid} = supervisor2:start_link(
?MODULE, {tcp, Sock, Channel, FrameMax,
ReaderPid, Protocol, {ConnName, Channel}}),
[LimiterPid] = supervisor2:find_child(SupPid, limiter),
[WriterPid] = supervisor2:find_child(SupPid, writer),
{ok, ChannelPid} =
supervisor2:start_child(
SupPid,
{channel, {rabbit_channel, start_link,
[Channel, ReaderPid, WriterPid, ReaderPid, ConnName,
Protocol, User, VHost, Capabilities, Collector,
LimiterPid]},
intrinsic, ?FAIR_WAIT, worker, [rabbit_channel]}),
{ok, AState} = rabbit_command_assembler:init(Protocol),
{ok, SupPid, {ChannelPid, AState}};
start_link({direct, Channel, ClientChannelPid, ConnPid, ConnName, Protocol,
User, VHost, Capabilities, Collector, AmqpParams}) ->
{ok, SupPid} = supervisor2:start_link(
?MODULE, {direct, {ConnName, Channel}}),
[LimiterPid] = supervisor2:find_child(SupPid, limiter),
{ok, ChannelPid} =
supervisor2:start_child(
SupPid,
{channel, {rabbit_channel, start_link,
[Channel, ClientChannelPid, ClientChannelPid, ConnPid,
ConnName, Protocol, User, VHost, Capabilities, Collector,
LimiterPid, AmqpParams]},
intrinsic, ?FAIR_WAIT, worker, [rabbit_channel]}),
{ok, SupPid, {ChannelPid, none}}.
%%----------------------------------------------------------------------------
init(Type) ->
?LG_PROCESS_TYPE(channel_sup),
{ok, {{one_for_all, 0, 1}, child_specs(Type)}}.
child_specs({tcp, Sock, Channel, FrameMax, ReaderPid, Protocol, Identity}) ->
[{writer, {rabbit_writer, start_link,
[Sock, Channel, FrameMax, Protocol, ReaderPid, Identity, true]},
intrinsic, ?FAIR_WAIT, worker, [rabbit_writer]}
| child_specs({direct, Identity})];
child_specs({direct, Identity}) ->
[{limiter, {rabbit_limiter, start_link, [Identity]},
transient, ?FAIR_WAIT, worker, [rabbit_limiter]}].
|
