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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/repl/insert_group.h"
namespace mongo {
class CollatorInterface;
class OpCounters;
namespace repl {
/**
* Caches per-collection properties which are relevant for oplog application, so that they don't
* have to be retrieved repeatedly for each op.
*/
class CachedCollectionProperties {
public:
struct CollectionProperties {
bool isCapped = false;
bool isClustered = false;
const CollatorInterface* collator = nullptr;
};
CollectionProperties getCollectionProperties(OperationContext* opCtx,
const StringMapHashedKey& ns);
private:
CollectionProperties getCollectionPropertiesImpl(OperationContext* opCtx,
const NamespaceString& nss);
StringMap<CollectionProperties> _cache;
};
/**
* This class contains some static methods common to ordinary oplog application and oplog
* application as part of tenant migration.
*/
class OplogApplierUtils {
public:
/**
* Specially sort collections that are $cmd first, before everything else. This will
* move commands with the special $cmd collection name to the beginning, rather than sorting
* them potentially in the middle of the sorted vector of insert/update/delete ops.
* This special sort behavior is required because DDL operations need to run before
* create/update/delete operations in a multi-doc transaction.
*/
static void stableSortByNamespace(std::vector<const OplogEntry*>* oplogEntryPointers);
/**
* Updates a CRUD op's hash and isForCappedCollection field if necessary.
*/
static void processCrudOp(OperationContext* opCtx,
OplogEntry* op,
uint32_t* hash,
StringMapHashedKey* hashedNs,
CachedCollectionProperties* collPropertiesCache);
/**
* Adds a single oplog entry to the appropriate writer vector. Returns the index of the
* writer vector the entry was written to.
*/
static uint32_t addToWriterVector(OperationContext* opCtx,
OplogEntry* op,
std::vector<std::vector<const OplogEntry*>>* writerVectors,
CachedCollectionProperties* collPropertiesCache,
boost::optional<uint32_t> forceWriterId = boost::none);
/**
* Adds a set of derivedOps to writerVectors.
* If `serial` is true, assign all derived operations to the writer vector corresponding to the
* hash of the first operation in `derivedOps`.
*/
static void addDerivedOps(OperationContext* opCtx,
std::vector<OplogEntry>* derivedOps,
std::vector<std::vector<const OplogEntry*>>* writerVectors,
CachedCollectionProperties* collPropertiesCache,
bool serial);
/**
* Returns the namespace string for this oplogEntry; if it has a UUID it looks up the
* corresponding namespace and returns it, otherwise it returns the oplog entry 'nss'. If there
* is a UUID and no namespace with that ID is found, throws NamespaceNotFound.
*/
static NamespaceString parseUUIDOrNs(OperationContext* opCtx, const OplogEntry& oplogEntry);
/**
* If the oplog entry has a UUID, returns the UUID with the database from 'nss'. Otherwise
* returns 'nss'
*/
static NamespaceStringOrUUID getNsOrUUID(const NamespaceString& nss, const OplogEntry& op);
/**
* The logic for oplog entry application which is shared between standard and tenant oplog
* application.
*/
static Status applyOplogEntryOrGroupedInsertsCommon(
OperationContext* opCtx,
const OplogEntryOrGroupedInserts& entryOrGroupedInserts,
OplogApplication::Mode oplogApplicationMode,
bool isDataConsistent,
IncrementOpsAppliedStatsFn incrementOpsAppliedStats,
OpCounters* opCounters);
/**
* The logic for oplog batch application which is shared between standard and tenant oplog
* application.
*/
static Status applyOplogBatchCommon(
OperationContext* opCtx,
std::vector<const OplogEntry*>* ops,
OplogApplication::Mode oplogApplicationMode,
bool allowNamespaceNotFoundErrorsOnCrudOps,
bool isDataConsistent,
InsertGroup::ApplyFunc applyOplogEntryOrGroupedInserts) noexcept;
};
} // namespace repl
} // namespace mongo
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