1 files changed, 53 insertions, 0 deletions
diff --git a/deps/rabbit/src/supervised_lifecycle.erl b/deps/rabbit/src/supervised_lifecycle.erl
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+++ b/deps/rabbit/src/supervised_lifecycle.erl
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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.
+%%
+
+%% Invoke callbacks on startup and termination.
+%%
+%% Simply hook this process into a supervision hierarchy, to have the
+%% callbacks invoked at a precise point during the establishment and
+%% teardown of that hierarchy, respectively.
+%%
+%% Or launch the process independently, and link to it, to have the
+%% callbacks invoked on startup and when the linked process
+%% terminates, respectively.
+
+-module(supervised_lifecycle).
+
+-behavior(gen_server).
+
+-export([start_link/3]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2,
+         code_change/3]).
+
+%%----------------------------------------------------------------------------
+
+-spec start_link(atom(), rabbit_types:mfargs(), rabbit_types:mfargs()) ->
+          rabbit_types:ok_pid_or_error().
+
+start_link(Name, StartMFA, StopMFA) ->
+    gen_server:start_link({local, Name}, ?MODULE, [StartMFA, StopMFA], []).
+
+%%----------------------------------------------------------------------------
+
+init([{M, F, A}, StopMFA]) ->
+    process_flag(trap_exit, true),
+    apply(M, F, A),
+    {ok, StopMFA}.
+
+handle_call(_Request, _From, State) -> {noreply, State}.
+
+handle_cast(_Msg, State) -> {noreply, State}.
+
+handle_info(_Info, State) -> {noreply, State}.
+
+terminate(_Reason, {M, F, A}) ->
+    apply(M, F, A),
+    ok.
+
+code_change(_OldVsn, State, _Extra) -> {ok, State}.