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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 "mongo/base/status.h"
#include "mongo/db/commands.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/operation_context.h"
#include "mongo/rpc/message.h"
#include "mongo/util/fail_point.h"
#include "mongo/util/future.h"
#include "mongo/util/polymorphic_scoped.h"
namespace mongo {
extern FailPoint rsStopGetMore;
extern FailPoint respondWithNotPrimaryInCommandDispatch;
// When active, we won't check if we are master in command dispatch. Activate this if you want to
// test failing during command execution.
extern FailPoint skipCheckingForNotMasterInCommandDispatch;
/**
* Helpers for writing ServiceEntryPointImpl implementations from a reusable core.
* Implementations are ServiceEntryPointMongod and ServiceEntryPointEmbedded, which share
* most of their code, but vary in small details captured by the Hooks customization
* interface.
*/
struct ServiceEntryPointCommon {
/**
* Interface for customizing ServiceEntryPointImpl behavior.
*/
class Hooks {
public:
virtual ~Hooks();
virtual bool lockedForWriting() const = 0;
virtual void setPrepareConflictBehaviorForReadConcern(
OperationContext* opCtx, const CommandInvocation* invocation) const = 0;
virtual void waitForReadConcern(OperationContext* opCtx,
const CommandInvocation* invocation,
const OpMsgRequest& request) const = 0;
/**
* Waits to satisfy a speculative majority read, if necessary.
*
* Speculative reads block after a query has executed to ensure that any data read satisfies
* the appropriate durability properties e.g. "majority" read concern. If the operation is
* not a speculative read, then this method does nothing.
*/
virtual void waitForSpeculativeMajorityReadConcern(OperationContext* opCtx) const = 0;
virtual void waitForWriteConcern(OperationContext* opCtx,
const CommandInvocation* invocation,
const repl::OpTime& lastOpBeforeRun,
BSONObjBuilder& commandResponseBuilder) const = 0;
virtual void waitForLinearizableReadConcern(OperationContext* opCtx) const = 0;
virtual void uassertCommandDoesNotSpecifyWriteConcern(const BSONObj& cmdObj) const = 0;
virtual void attachCurOpErrInfo(OperationContext* opCtx, const BSONObj& replyObj) const = 0;
virtual void handleException(const DBException& e, OperationContext* opCtx) const = 0;
virtual void advanceConfigOpTimeFromRequestMetadata(OperationContext* opCtx) const = 0;
MONGO_WARN_UNUSED_RESULT_FUNCTION virtual std::unique_ptr<PolymorphicScoped>
scopedOperationCompletionShardingActions(OperationContext* opCtx) const = 0;
virtual void appendReplyMetadataOnError(OperationContext* opCtx,
BSONObjBuilder* metadataBob) const = 0;
virtual void appendReplyMetadata(OperationContext* opCtx,
const OpMsgRequest& request,
BSONObjBuilder* metadataBob) const = 0;
};
static Future<DbResponse> handleRequest(OperationContext* opCtx,
const Message& m,
std::unique_ptr<const Hooks> hooks) noexcept;
/**
* Produce a new object based on cmdObj, but with redactions applied as specified by
* `command->redactForLogging`.
*/
static BSONObj getRedactedCopyForLogging(const Command* command, const BSONObj& cmdObj);
};
} // namespace mongo
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