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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 "mongo/db/process_health/fault_facet.h"
#include "mongo/db/service_context.h"
#include "mongo/util/clock_source.h"
#include "mongo/util/duration.h"
#include "mongo/util/timer.h"
namespace mongo {
namespace process_health {
/**
* Internal implementation of the Fault class.
* @see Fault
*/
class Fault : public std::enable_shared_from_this<Fault> {
Fault(const Fault&) = delete;
Fault& operator=(const Fault&) = delete;
public:
explicit Fault(ClockSource* clockSource);
~Fault() = default;
// Fault interface.
UUID getId() const;
/**
* @return The lifetime of this fault from the moment it was created.
* Invariant: getDuration() >= getActiveFaultDuration()
*/
Milliseconds getDuration() const;
/**
* Describes the current fault.
*/
void appendDescription(BSONObjBuilder* builder) const;
BSONObj toBSON() const {
BSONObjBuilder builder;
appendDescription(&builder);
return builder.obj();
}
std::vector<FaultFacetPtr> getFacets() const;
/**
* Checks that a Facet of a given type already exists and returns it.
*
* @returns existing facet or null.
*/
FaultFacetPtr getFaultFacet(FaultFacetType type);
/**
* Update the fault with supplied facet.
*
* @param facet new value to insert/replace or nullptr to delete.
*/
void upsertFacet(FaultFacetPtr facet);
/**
* Delete a facet from this fault by its type.
*
* @param type type of facet to remove.
*/
void removeFacet(FaultFacetType type);
/**
* Performs necessary actions to delete all resolved facets.
*/
void garbageCollectResolvedFacets();
bool hasCriticalFacet(const FaultManagerConfig& config) const;
private:
const UUID _id = UUID::gen();
ClockSource* const _clockSource;
const Date_t _startTime;
mutable Mutex _mutex = MONGO_MAKE_LATCH(HierarchicalAcquisitionLevel(0), "Fault::_mutex");
// We don't need a map by type because we expect to have only few facets.
// Linear search is much faster, we want to avoid any lock contention here.
std::deque<FaultFacetPtr> _facets;
};
using FaultPtr = std::shared_ptr<Fault>;
using FaultConstPtr = std::shared_ptr<const Fault>;
} // namespace process_health
} // namespace mongo
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