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/**
* Copyright (C) 2021-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 <string>
#include <thread>
#include "mongo/db/service_context.h"
#include "mongo/stdx/thread.h"
namespace mongo {
namespace process_health {
class FaultManager;
/**
* Tracks that the health checks are invoked regularly and have progress.
*/
class ProgressMonitor {
public:
ProgressMonitor(FaultManager* faultManager,
ServiceContext* svcCtx,
std::function<void(std::string cause)> crashCb);
// Signals that the monitoring can stop and blocks until the thread is joined.
// Invoked to signal that the task executor is joined.
void join();
// Checks that the health checks are invoked and are not stuck forever. Invokes the callback
// after timeout configured by options.
void progressMonitorCheck(std::function<void(std::string cause)> crashCb);
private:
// Checks that the periodic health checks actually make progress.
void _progressMonitorLoop();
FaultManager* const _faultManager;
ServiceContext* const _svcCtx;
// Callback used to crash the server.
const std::function<void(std::string cause)> _crashCb;
// This flag is set after the _taskExecutor join() returns, thus
// we know no more health checks are still running.
AtomicWord<bool> _terminate{false};
stdx::thread _progressMonitorThread;
};
} // namespace process_health
} // namespace mongo
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