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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 "mongo/db/operation_context.h"
#include "mongo/db/service_liaison.h"
#include "mongo/db/session/logical_session_id.h"
#include "mongo/util/hierarchical_acquisition.h"
#include "mongo/util/periodic_runner.h"
#include "mongo/util/time_support.h"
namespace mongo {
/**
* This is the service liaison to mongos for the logical session cache.
*
* This class will return active sessions for cursors stored in the
* global cursor manager and cursors in per-collection managers. This
* class will also walk the service context to find all sessions for
* currently-running operations on this server.
*
* Job scheduling on this class will be handled behind the scenes by a
* periodic runner for this mongos. The time will be returned from the
* system clock.
*/
class ServiceLiaisonMongos : public ServiceLiaison {
public:
LogicalSessionIdSet getActiveOpSessions() const override;
LogicalSessionIdSet getOpenCursorSessions(OperationContext* opCtx) const override;
void scheduleJob(PeriodicRunner::PeriodicJob job) override;
void join() override;
Date_t now() const override;
std::pair<Status, int> killCursorsWithMatchingSessions(
OperationContext* opCtx, const SessionKiller::Matcher& matcher) override;
protected:
/**
* Returns the service context.
*/
ServiceContext* _context() override;
Mutex _mutex =
MONGO_MAKE_LATCH(HierarchicalAcquisitionLevel(0), "ServiceLiaisonMongos::_mutex");
std::vector<PeriodicJobAnchor> _jobs;
};
} // namespace mongo
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