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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <functional>
#include <memory>
#include "mongo/db/service_context.h"
#include "mongo/transport/service_executor.h"
#include "mongo/transport/session.h"
namespace mongo {
namespace transport {
/*
* The ServiceStateMachine holds the state of a single client connection and represents the
* lifecycle of each user request as a state machine. It is the glue between the stateless
* ServiceEntryPoint and TransportLayer that ties network and database logic together for a
* user.
*/
class ServiceStateMachine {
ServiceStateMachine(ServiceStateMachine&) = delete;
ServiceStateMachine& operator=(ServiceStateMachine&) = delete;
ServiceStateMachine(ServiceStateMachine&&) = delete;
ServiceStateMachine& operator=(ServiceStateMachine&&) = delete;
public:
class Impl;
/*
* Construct a ServiceStateMachine for a given Client.
*/
ServiceStateMachine(ServiceContext::UniqueClient client);
/*
* start() schedules a call to _runOnce() in the future.
*/
void start(ServiceExecutorContext seCtx);
/*
* Terminates the associated transport Session, regardless of tags.
*
* This will not block on the session terminating cleaning itself up, it returns immediately.
*/
void terminate();
/*
* Terminates the associated transport Session if its tags don't match the supplied tags.
* If the session is in a pending state, before any tags have been set, it will not be
* terminated.
*
* This will not block on the session terminating cleaning itself up, it returns immediately.
*/
void terminateIfTagsDontMatch(transport::Session::TagMask tags);
/*
* Sets a function to be called after the session is ended
*/
void setCleanupHook(std::function<void()> hook);
private:
std::shared_ptr<Impl> _impl;
};
} // namespace transport
} // namespace mongo
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