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/**
* Copyright (C) 2018 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/dbdirectclient.h"
#include "mongo/db/pipeline/mongo_process_common.h"
#include "mongo/db/pipeline/pipeline.h"
namespace mongo {
/**
* Class to provide access to mongod-specific implementations of methods required by some
* document sources.
*/
class MongoDInterface : public MongoProcessCommon {
public:
static std::shared_ptr<MongoProcessInterface> create(OperationContext* opCtx);
MongoDInterface(OperationContext* opCtx);
virtual ~MongoDInterface() = default;
void setOperationContext(OperationContext* opCtx) final;
DBClientBase* directClient() final;
bool isSharded(OperationContext* opCtx, const NamespaceString& nss) final;
virtual void insert(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
std::vector<BSONObj>&& objs);
virtual void update(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
std::vector<BSONObj>&& queries,
std::vector<BSONObj>&& updates,
bool upsert,
bool multi);
CollectionIndexUsageMap getIndexStats(OperationContext* opCtx, const NamespaceString& ns) 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;
BSONObj getCollectionOptions(const NamespaceString& nss) final;
void renameIfOptionsAndIndexesHaveNotChanged(OperationContext* opCtx,
const BSONObj& renameCommandObj,
const NamespaceString& targetNs,
const BSONObj& originalCollectionOptions,
const std::list<BSONObj>& originalIndexes) final;
StatusWith<std::unique_ptr<Pipeline, PipelineDeleter>> makePipeline(
const std::vector<BSONObj>& rawPipeline,
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const MakePipelineOptions opts = MakePipelineOptions{}) final;
Status attachCursorSourceToPipeline(const boost::intrusive_ptr<ExpressionContext>& expCtx,
Pipeline* pipeline) final;
std::string getShardName(OperationContext* opCtx) const final;
std::pair<std::vector<FieldPath>, bool> collectDocumentKeyFields(
OperationContext* opCtx, NamespaceStringOrUUID nssOrUUID) const final;
boost::optional<Document> lookupSingleDocument(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
UUID collectionUUID,
const Document& documentKey,
boost::optional<BSONObj> readConcern) final;
std::vector<GenericCursor> getIdleCursors(const boost::intrusive_ptr<ExpressionContext>& expCtx,
CurrentOpUserMode userMode) const final;
void fsyncLock(OperationContext* opCtx) final;
void fsyncUnlock(OperationContext* opCtx) final;
BackupCursorState openBackupCursor(OperationContext* opCtx) final;
void closeBackupCursor(OperationContext* opCtx, std::uint64_t cursorId) final;
std::vector<BSONObj> getMatchingPlanCacheEntryStats(OperationContext*,
const NamespaceString&,
const MatchExpression*) const final;
bool uniqueKeyIsSupportedByIndex(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
const std::set<FieldPath>& uniqueKeyPaths) const final;
protected:
BSONObj _reportCurrentOpForClient(OperationContext* opCtx,
Client* client,
CurrentOpTruncateMode truncateOps) const final;
void _reportCurrentOpsForIdleSessions(OperationContext* opCtx,
CurrentOpUserMode userMode,
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);
DBDirectClient _client;
std::map<UUID, std::unique_ptr<const CollatorInterface>> _collatorCache;
};
/**
* Specialized version of the MongoDInterface when this node is a shard server.
*/
class MongoDInterfaceShardServer final : public MongoDInterface {
public:
using MongoDInterface::MongoDInterface;
/**
* Inserts the documents 'objs' into the namespace 'ns' using the ClusterWriter for locking,
* routing, stale config handling, etc.
*/
void insert(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
std::vector<BSONObj>&& objs) final;
/**
* Replaces the documents matching 'queries' with 'updates' using the ClusterWriter for locking,
* routing, stale config handling, etc.
*/
void update(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
std::vector<BSONObj>&& queries,
std::vector<BSONObj>&& updates,
bool upsert,
bool multi) final;
};
} // namespace mongo
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