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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 <memory>
#include <vector>
#include "mongo/stdx/condition_variable.h"
#include "mongo/stdx/mutex.h"
#include "mongo/stdx/thread.h"
#include "mongo/util/clock_source.h"
#include "mongo/util/future.h"
#include "mongo/util/periodic_runner.h"
namespace mongo {
class Client;
class ServiceContext;
/**
* An implementation of the PeriodicRunner which uses a thread per job and condvar waits on those
* threads to independently sleep.
*/
class PeriodicRunnerImpl : public PeriodicRunner {
public:
PeriodicRunnerImpl(ServiceContext* svc, ClockSource* clockSource);
JobAnchor makeJob(PeriodicJob job) override;
private:
class PeriodicJobImpl : public ControllableJob {
PeriodicJobImpl(const PeriodicJobImpl&) = delete;
PeriodicJobImpl& operator=(const PeriodicJobImpl&) = delete;
public:
friend class PeriodicRunnerImpl;
PeriodicJobImpl(PeriodicJob job, ClockSource* source, ServiceContext* svc);
void start() override;
void pause() override;
void resume() override;
void stop() override;
Milliseconds getPeriod() override;
void setPeriod(Milliseconds ms) override;
enum class ExecutionStatus { NOT_SCHEDULED, RUNNING, PAUSED, CANCELED };
private:
void _run();
PeriodicJob _job;
ClockSource* _clockSource;
ServiceContext* _serviceContext;
stdx::thread _thread;
SharedPromise<void> _stopPromise;
stdx::mutex _mutex;
stdx::condition_variable _condvar;
/**
* The current execution status of the job.
*/
ExecutionStatus _execStatus{ExecutionStatus::NOT_SCHEDULED};
};
std::shared_ptr<PeriodicRunnerImpl::PeriodicJobImpl> createAndAddJob(PeriodicJob job);
ServiceContext* _svc;
ClockSource* _clockSource;
};
} // namespace mongo
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