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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 <vector>
#include "mongo/db/process_health/health_observer.h"
#include "mongo/db/service_context.h"
#include "mongo/platform/mutex.h"
namespace mongo {
namespace process_health {
/**
* Registration mechanism for all health observers.
* This is static class not requiring an instance to work.
*/
class HealthObserverRegistration {
public:
/**
* Registers a factory method, which will be invoked later to instantiate the observer.
* This must be invoked by static initializers, the code is not internally synchronized.
*
* @param factoryCallback creates observer instance when invoked.
*/
static void registerObserverFactory(
std::function<std::unique_ptr<HealthObserver>(ServiceContext* svcCtx)> factoryCallback);
/**
* Invokes all registered factories and returns new instances.
* The ownership of all observers is transferred to the invoker.
*/
static std::vector<std::unique_ptr<HealthObserver>> instantiateAllObservers(
ServiceContext* svcCtx);
/**
* Test-only method to cleanup the list of registered factories.
*/
static void resetObserverFactoriesForTest();
};
} // namespace process_health
} // namespace mongo
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