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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/concurrency/locker_noop.h"
#include "mongo/db/service_context.h"
namespace mongo {
/**
* ServiceContext hook that ensures OperationContexts are created with a valid
* Locker instance. Intended for use in tests that do not require a storage engine.
*/
class LockerNoopClientObserver : public ServiceContext::ClientObserver {
public:
LockerNoopClientObserver() = default;
~LockerNoopClientObserver() = default;
void onCreateClient(Client* client) final {}
void onDestroyClient(Client* client) final {}
void onCreateOperationContext(OperationContext* opCtx) override {
opCtx->setLockState(std::make_unique<LockerNoop>());
}
void onDestroyOperationContext(OperationContext* opCtx) final {}
};
/**
* Unlike LockerNoopClientObserver, this ClientObserver will not overwrite any existing Lockers on
* the OperationContext.
*
* This class is suitable for test fixtures that may be used in executables with LockerImpl service
* hooks installed.
*/
class LockerNoopClientObserverWithReplacementPolicy : public LockerNoopClientObserver {
public:
LockerNoopClientObserverWithReplacementPolicy() = default;
~LockerNoopClientObserverWithReplacementPolicy() = default;
void onCreateOperationContext(OperationContext* opCtx) final {
if (opCtx->lockState()) {
return;
}
LockerNoopClientObserver::onCreateOperationContext(opCtx);
}
};
} // namespace mongo
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