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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2017 Red Hat, Inc
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#pragma once
#include "Fwd.h"
class AuthAuthorizer;
namespace crimson::net {
class Dispatcher {
public:
virtual ~Dispatcher() {}
// Dispatchers are put into a chain as described by chain-of-responsibility
// pattern. If any of the dispatchers claims this message, it returns a valid
// future to prevent other dispatchers from processing it, and this is also
// used to throttle the connection if it's too busy.
virtual std::optional<seastar::future<>> ms_dispatch(ConnectionRef, MessageRef) = 0;
// The connection is moving to the new_shard under accept/connect.
// User should not operate conn in this shard thereafter.
virtual void ms_handle_shard_change(
ConnectionRef conn,
seastar::shard_id new_shard,
bool is_accept_or_connect) {}
// The connection is accepted or recoverred(lossless), all the followup
// events and messages will be dispatched to this shard.
//
// is_replace=true means the accepted connection has replaced
// another connecting connection with the same peer_addr, which currently only
// happens under lossy policy when both sides wish to connect to each other.
virtual void ms_handle_accept(ConnectionRef conn, seastar::shard_id prv_shard, bool is_replace) {}
// The connection is (re)connected, all the followup events and messages will
// be dispatched to this shard.
virtual void ms_handle_connect(ConnectionRef conn, seastar::shard_id prv_shard) {}
// a reset event is dispatched when the connection is closed unexpectedly.
//
// is_replace=true means the reset connection is going to be replaced by
// another accepting connection with the same peer_addr, which currently only
// happens under lossy policy when both sides wish to connect to each other.
virtual void ms_handle_reset(ConnectionRef conn, bool is_replace) {}
virtual void ms_handle_remote_reset(ConnectionRef conn) {}
};
} // namespace crimson::net
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