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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 <vector>
#include "mongo/bson/bsonobj.h"
#include "mongo/db/pipeline/process_interface/mongo_process_interface.h"
#include "mongo/s/write_ops/batched_command_request.h"
namespace mongo {
/**
* CommonProcessInterface provides base implementations of any MongoProcessInterface methods
* whose code is largely identical on mongoD and mongoS.
*/
class CommonProcessInterface : public MongoProcessInterface {
public:
virtual ~CommonProcessInterface() = default;
/**
* Returns true if the field names of 'keyPattern' are exactly those in 'uniqueKeyPaths', and
* each of the elements of 'keyPattern' is numeric, i.e. not "text", "$**", or any other special
* type of index.
*/
static bool keyPatternNamesExactPaths(const BSONObj& keyPattern,
const std::set<FieldPath>& uniqueKeyPaths);
/**
* Attaches the write concern to the given batch request. If 'writeConcern' has been default
* initialized to {w: 0, wtimeout: 0} then we do not bother attaching it.
*/
static void attachWriteConcern(BatchedCommandRequest* request,
const WriteConcernOptions& writeConcern);
std::vector<BSONObj> getCurrentOps(const boost::intrusive_ptr<ExpressionContext>& expCtx,
CurrentOpConnectionsMode connMode,
CurrentOpSessionsMode sessionMode,
CurrentOpUserMode userMode,
CurrentOpTruncateMode truncateMode,
CurrentOpCursorMode cursorMode,
CurrentOpBacktraceMode backtraceMode) const final;
virtual std::vector<FieldPath> collectDocumentKeyFieldsActingAsRouter(
OperationContext*, const NamespaceString&) const override;
boost::optional<ChunkVersion> refreshAndGetCollectionVersion(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss) const override;
std::string getHostAndPort(OperationContext* opCtx) const override;
protected:
/**
* Converts the fields from a ShardKeyPattern to a vector of FieldPaths, including the _id if
* it's not already in 'keyPatternFields'.
*/
std::vector<FieldPath> _shardKeyToDocumentKeyFields(
const std::vector<std::unique_ptr<FieldRef>>& keyPatternFields) const;
/**
* Returns a BSONObj representing a report of the operation which is currently being
* executed by the supplied client. This method is called by the getCurrentOps method of
* CommonProcessInterface to delegate to the mongoS- or mongoD- specific implementation.
*/
virtual BSONObj _reportCurrentOpForClient(OperationContext* opCtx,
Client* client,
CurrentOpTruncateMode truncateOps,
CurrentOpBacktraceMode backtraceMode) const = 0;
/**
* Iterates through all entries in the local SessionCatalog, and adds an entry to the 'ops'
* vector for each idle session that has stashed its transaction locks while sleeping.
*/
virtual void _reportCurrentOpsForIdleSessions(OperationContext* opCtx,
CurrentOpUserMode userMode,
std::vector<BSONObj>* ops) const = 0;
/**
* Report information about transaction coordinators by iterating through all
* TransactionCoordinators in the TransactionCoordinatorCatalog.
*/
virtual void _reportCurrentOpsForTransactionCoordinators(OperationContext* opCtx,
bool includeIdle,
std::vector<BSONObj>* ops) const = 0;
/**
* Converts an array of field names into a set of FieldPath. Throws if 'fields' contains
* duplicate elements.
*/
std::set<FieldPath> _convertToFieldPaths(const std::vector<std::string>& fields) const;
};
} // namespace mongo
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