mirror of
https://github.com/facebook/sapling.git
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47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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/*
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* Copyright (c) 2004-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#pragma once
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namespace folly {
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template <typename T>
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class Future;
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}
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namespace facebook {
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namespace eden {
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class TakeoverData;
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/**
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* TakeoverHandler is a pure virtual interface for classes that want to
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* implement graceful takeover functionality.
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*
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* This is primarily implemented by the EdenServer class. However, there are
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* also alternative implementations used for unit testing.
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*/
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class TakeoverHandler {
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public:
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virtual ~TakeoverHandler() {}
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/**
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* startTakeoverShutdown() will be called when a graceful shutdown has been
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* requested, with a remote process attempting to take over the currently
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* running mount points.
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*
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* This should return a Future that will produce the TakeoverData to send to
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* the remote edenfs process once this edenfs process is ready to transfer
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* its mounts.
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*/
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virtual folly::Future<TakeoverData> startTakeoverShutdown() = 0;
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};
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} // namespace eden
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} // namespace facebook
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