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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/db/exec/shard_filterer.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/pipeline/process_interface/common_process_interface.h"
namespace mongo {
/**
* Class to provide access to mongos-specific implementations of methods required by some
* document sources.
*/
class MongosProcessInterface : public CommonProcessInterface {
public:
using CommonProcessInterface::CommonProcessInterface;
virtual ~MongosProcessInterface() = default;
boost::optional<Document> lookupSingleDocument(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
UUID collectionUUID,
const Document& documentKey,
boost::optional<BSONObj> readConcern) final;
boost::optional<Document> lookupSingleDocumentLocally(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
const Document& documentKey) final;
std::vector<GenericCursor> getIdleCursors(const boost::intrusive_ptr<ExpressionContext>& expCtx,
CurrentOpUserMode userMode) const final;
std::unique_ptr<TransactionHistoryIteratorBase> createTransactionHistoryIterator(
repl::OpTime time) const override {
MONGO_UNREACHABLE;
}
bool isSharded(OperationContext* opCtx, const NamespaceString& nss) final;
Status insert(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
std::vector<BSONObj>&& objs,
const WriteConcernOptions& wc,
boost::optional<OID>) final {
MONGO_UNREACHABLE;
}
StatusWith<UpdateResult> update(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
BatchedObjects&& batch,
const WriteConcernOptions& wc,
UpsertType upsert,
bool multi,
boost::optional<OID>) final {
MONGO_UNREACHABLE;
}
std::vector<Document> getIndexStats(OperationContext* opCtx,
const NamespaceString& ns,
StringData host,
bool addShardName) final {
MONGO_UNREACHABLE;
}
std::list<BSONObj> getIndexSpecs(OperationContext* opCtx,
const NamespaceString& ns,
bool includeBuildUUIDs) final {
MONGO_UNREACHABLE;
}
std::deque<BSONObj> listCatalog(OperationContext* opCtx) const final {
MONGO_UNREACHABLE;
}
boost::optional<BSONObj> getCatalogEntry(OperationContext* opCtx,
const NamespaceString& ns) const final {
MONGO_UNREACHABLE;
}
void appendLatencyStats(OperationContext* opCtx,
const NamespaceString& nss,
bool includeHistograms,
BSONObjBuilder* builder) const final {
MONGO_UNREACHABLE;
}
Status appendStorageStats(OperationContext* opCtx,
const NamespaceString& nss,
const StorageStatsSpec& spec,
BSONObjBuilder* builder) const final {
MONGO_UNREACHABLE;
}
Status appendRecordCount(OperationContext* opCtx,
const NamespaceString& nss,
BSONObjBuilder* builder) const final {
MONGO_UNREACHABLE;
}
Status appendQueryExecStats(OperationContext* opCtx,
const NamespaceString& nss,
BSONObjBuilder* builder) const final {
MONGO_UNREACHABLE;
}
BSONObj getCollectionOptions(OperationContext* opCtx, const NamespaceString& nss) final {
MONGO_UNREACHABLE;
}
void renameIfOptionsAndIndexesHaveNotChanged(OperationContext* opCtx,
const BSONObj& renameCommandObj,
const NamespaceString& targetNs,
const BSONObj& originalCollectionOptions,
const std::list<BSONObj>& originalIndexes) final {
MONGO_UNREACHABLE;
}
void createCollection(OperationContext* opCtx,
const std::string& dbName,
const BSONObj& cmdObj) final {
MONGO_UNREACHABLE;
}
void createIndexesOnEmptyCollection(OperationContext* opCtx,
const NamespaceString& ns,
const std::vector<BSONObj>& indexSpecs) final {
MONGO_UNREACHABLE;
}
void dropCollection(OperationContext* opCtx, const NamespaceString& collection) final {
MONGO_UNREACHABLE;
}
BSONObj preparePipelineAndExplain(Pipeline* ownedPipeline,
ExplainOptions::Verbosity verbosity) final;
std::unique_ptr<Pipeline, PipelineDeleter> attachCursorSourceToPipelineForLocalRead(
Pipeline* pipeline) final {
// It is not meaningful to perform a "local read" on mongos.
MONGO_UNREACHABLE;
}
std::unique_ptr<ShardFilterer> getShardFilterer(
const boost::intrusive_ptr<ExpressionContext>& expCtx) const override {
return nullptr;
}
std::string getShardName(OperationContext* opCtx) const final {
MONGO_UNREACHABLE;
}
bool inShardedEnvironment(OperationContext* opCtx) const final {
return true;
}
/**
* The following methods only make sense for data-bearing nodes and should never be called on
* a mongos.
*/
BackupCursorState openBackupCursor(OperationContext* opCtx,
const StorageEngine::BackupOptions& options) final {
MONGO_UNREACHABLE;
}
void closeBackupCursor(OperationContext* opCtx, const UUID& backupId) final {
MONGO_UNREACHABLE;
}
BackupCursorExtendState extendBackupCursor(OperationContext* opCtx,
const UUID& backupId,
const Timestamp& extendTo) final {
MONGO_UNREACHABLE;
}
/**
* Mongos does not have a plan cache, so this method should never be called on mongos. Upstream
* checks are responsible for generating an error if a user attempts to introspect the plan
* cache on mongos.
*/
std::vector<BSONObj> getMatchingPlanCacheEntryStats(OperationContext*,
const NamespaceString&,
const MatchExpression*) const final {
MONGO_UNREACHABLE;
}
bool fieldsHaveSupportingUniqueIndex(const boost::intrusive_ptr<ExpressionContext>&,
const NamespaceString&,
const std::set<FieldPath>& fieldPaths) const;
void checkRoutingInfoEpochOrThrow(const boost::intrusive_ptr<ExpressionContext>&,
const NamespaceString&,
ChunkVersion) const final {
MONGO_UNREACHABLE;
}
std::unique_ptr<ScopedExpectUnshardedCollection> expectUnshardedCollectionInScope(
OperationContext* opCtx,
const NamespaceString& nss,
const boost::optional<DatabaseVersion>& dbVersion) override {
MONGO_UNREACHABLE;
}
void checkOnPrimaryShardForDb(OperationContext* opCtx, const NamespaceString& nss) override {
MONGO_UNREACHABLE;
}
std::unique_ptr<ResourceYielder> getResourceYielder(StringData cmdName) const override {
return nullptr;
}
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 override;
/**
* If 'allowTargetingShards' is true, splits the pipeline and dispatch half to the shards,
* leaving the merging half executing in this process after attaching a $mergeCursors. Will
* retry on network errors and also on StaleConfig errors to avoid restarting the entire
* operation.
*/
std::unique_ptr<Pipeline, PipelineDeleter> attachCursorSourceToPipeline(
Pipeline* pipeline,
ShardTargetingPolicy shardTargetingPolicy = ShardTargetingPolicy::kAllowed,
boost::optional<BSONObj> readConcern = boost::none) final;
std::unique_ptr<TemporaryRecordStore> createTemporaryRecordStore(
const boost::intrusive_ptr<ExpressionContext>& expCtx, KeyFormat keyFormat) const final {
MONGO_UNREACHABLE;
}
void writeRecordsToRecordStore(const boost::intrusive_ptr<ExpressionContext>& expCtx,
RecordStore* rs,
std::vector<Record>* records,
const std::vector<Timestamp>& ts) const final {
MONGO_UNREACHABLE;
}
Document readRecordFromRecordStore(const boost::intrusive_ptr<ExpressionContext>& expCtx,
RecordStore* rs,
RecordId rID) const final {
MONGO_UNREACHABLE;
}
void deleteRecordFromRecordStore(const boost::intrusive_ptr<ExpressionContext>& expCtx,
RecordStore* rs,
RecordId rID) const final {
MONGO_UNREACHABLE;
}
void truncateRecordStore(const boost::intrusive_ptr<ExpressionContext>& expCtx,
RecordStore* rs) const final {
MONGO_UNREACHABLE;
}
protected:
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;
void _reportCurrentOpsForPrimaryOnlyServices(OperationContext* opCtx,
CurrentOpConnectionsMode connMode,
CurrentOpSessionsMode sessionMode,
std::vector<BSONObj>* ops) const final;
};
} // namespace mongo
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