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/**
* Copyright (C) 2020-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/client.h"
#include "mongo/db/exec/shard_filterer.h"
#include "mongo/db/ops/write_ops_exec.h"
#include "mongo/db/ops/write_ops_gen.h"
#include "mongo/db/pipeline/javascript_execution.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/pipeline/process_interface/common_process_interface.h"
#include "mongo/s/write_ops/batched_command_request.h"
namespace mongo {
using write_ops::Insert;
using write_ops::Update;
/**
* Provides the implementations of interfaces that are shared across different types of mongod
* nodes.
*/
class CommonMongodProcessInterface : public CommonProcessInterface {
public:
using CommonProcessInterface::CommonProcessInterface;
virtual ~CommonMongodProcessInterface() = default;
std::unique_ptr<TransactionHistoryIteratorBase> createTransactionHistoryIterator(
repl::OpTime time) const final;
std::vector<Document> getIndexStats(OperationContext* opCtx,
const NamespaceString& ns,
StringData host,
bool addShardName) final;
void appendLatencyStats(OperationContext* opCtx,
const NamespaceString& nss,
bool includeHistograms,
BSONObjBuilder* builder) const final;
Status appendStorageStats(OperationContext* opCtx,
const NamespaceString& nss,
const BSONObj& param,
BSONObjBuilder* builder) const final;
Status appendRecordCount(OperationContext* opCtx,
const NamespaceString& nss,
BSONObjBuilder* builder) const final;
Status appendQueryExecStats(OperationContext* opCtx,
const NamespaceString& nss,
BSONObjBuilder* builder) const final override;
BSONObj getCollectionOptions(OperationContext* opCtx, const NamespaceString& nss) final;
std::unique_ptr<Pipeline, PipelineDeleter> attachCursorSourceToPipelineForLocalRead(
const boost::intrusive_ptr<ExpressionContext>& expCtx, Pipeline* pipeline) final;
std::string getShardName(OperationContext* opCtx) const final;
boost::optional<Document> lookupSingleDocument(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
UUID collectionUUID,
const Document& documentKey,
boost::optional<BSONObj> readConcern,
bool allowSpeculativeMajorityRead = false) final;
std::vector<GenericCursor> getIdleCursors(const boost::intrusive_ptr<ExpressionContext>& expCtx,
CurrentOpUserMode userMode) const final;
BackupCursorState openBackupCursor(OperationContext* opCtx,
const StorageEngine::BackupOptions& options) final;
void closeBackupCursor(OperationContext* opCtx, const UUID& backupId) final;
BackupCursorExtendState extendBackupCursor(OperationContext* opCtx,
const UUID& backupId,
const Timestamp& extendTo) final;
std::vector<BSONObj> getMatchingPlanCacheEntryStats(OperationContext*,
const NamespaceString&,
const MatchExpression*) const final;
bool fieldsHaveSupportingUniqueIndex(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
const std::set<FieldPath>& fieldPaths) const;
std::unique_ptr<ResourceYielder> getResourceYielder() const final;
std::pair<std::set<FieldPath>, boost::optional<ChunkVersion>>
ensureFieldsUniqueOrResolveDocumentKey(const boost::intrusive_ptr<ExpressionContext>& expCtx,
boost::optional<std::set<FieldPath>> fieldPaths,
boost::optional<ChunkVersion> targetCollectionVersion,
const NamespaceString& outputNs) const final;
protected:
/**
* 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);
/**
* Builds an ordered insert op on namespace 'nss' and documents to be written 'objs'.
*/
Insert buildInsertOp(const NamespaceString& nss,
std::vector<BSONObj>&& objs,
bool bypassDocValidation);
/**
* Builds an ordered update op on namespace 'nss' with update entries contained in 'batch'.
*/
Update buildUpdateOp(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
BatchedObjects&& batch,
UpsertType upsert,
bool multi);
BSONObj _reportCurrentOpForClient(OperationContext* opCtx,
Client* client,
CurrentOpTruncateMode truncateOps,
CurrentOpBacktraceMode backtraceMode) const final;
void _reportCurrentOpsForIdleSessions(OperationContext* opCtx,
CurrentOpUserMode userMode,
std::vector<BSONObj>* ops) const final;
void _reportCurrentOpsForTransactionCoordinators(OperationContext* opCtx,
bool includeIdle,
std::vector<BSONObj>* ops) const final;
private:
/**
* Looks up the collection default collator for the collection given by 'collectionUUID'. A
* collection's default collation is not allowed to change, so we cache the result to allow
* for quick lookups in the future. Looks up the collection by UUID, and returns 'nullptr'
* if the collection does not exist or if the collection's default collation is the simple
* collation.
*/
std::unique_ptr<CollatorInterface> _getCollectionDefaultCollator(OperationContext* opCtx,
StringData dbName,
UUID collectionUUID);
std::map<UUID, std::unique_ptr<const CollatorInterface>> _collatorCache;
// Object which contains a JavaScript Scope, used for executing JS in pipeline stages and
// expressions. Owned by the process interface so that there is one common scope for the
// lifetime of a pipeline.
std::unique_ptr<JsExecution> _jsExec;
};
} // namespace mongo
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