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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 <cstdint>
#include <memory>
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/logv2/log_severity_suppressor.h"
#include "mongo/stdx/variant.h"
#include "mongo/transport/service_entry_point.h"
#include "mongo/transport/session.h"
#include "mongo/util/duration.h"
#include "mongo/util/net/cidr.h"
namespace mongo {
class ServiceContext;
/**
* A basic entry point from the TransportLayer into a server.
*
* The server logic is implemented inside of handleRequest() by a subclass.
* startSession() spawns and detaches a new thread for each incoming connection
* (transport::Session).
*/
class ServiceEntryPointImpl : public ServiceEntryPoint {
public:
static constexpr Seconds kSlowSessionWorkflowLogSuppresionPeriod{5};
explicit ServiceEntryPointImpl(ServiceContext* svcCtx);
~ServiceEntryPointImpl();
ServiceEntryPointImpl(const ServiceEntryPointImpl&) = delete;
ServiceEntryPointImpl& operator=(const ServiceEntryPointImpl&) = delete;
void startSession(std::shared_ptr<transport::Session> session) override;
void endAllSessions(transport::Session::TagMask tags) final;
void endAllSessionsNoTagMask();
Status start() final;
bool shutdown(Milliseconds timeout) final;
bool shutdownAndWait(Milliseconds timeout);
bool waitForNoSessions(Milliseconds timeout);
void appendStats(BSONObjBuilder* bob) const override;
size_t numOpenSessions() const final;
size_t maxOpenSessions() const final;
logv2::LogSeverity slowSessionWorkflowLogSeverity() final;
void onClientDisconnect(Client* client) final;
/** `onClientDisconnect` calls this before doing anything else. */
virtual void derivedOnClientDisconnect(Client* client) {}
protected:
/** Imbue the new Client with a ServiceExecutorContext. */
virtual void configureServiceExecutorContext(ServiceContext::UniqueClient& client,
bool isPrivilegedSession);
private:
class Sessions;
ServiceContext* const _svcCtx;
const size_t _maxSessions;
size_t _rejectedSessions;
std::unique_ptr<Sessions> _sessions;
logv2::SeveritySuppressor _slowSessionWorkflowLogSuppressor{
kSlowSessionWorkflowLogSuppresionPeriod,
logv2::LogSeverity::Info(),
logv2::LogSeverity::Debug(2)};
};
/*
* Returns true if a session with remote/local addresses should be exempted from maxConns
*/
bool shouldOverrideMaxConns(const std::shared_ptr<transport::Session>& session,
const std::vector<stdx::variant<CIDR, std::string>>& exemptions);
} // namespace mongo
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