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/**
* Copyright (C) 2015 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/client/connection_string.h"
#include "mongo/db/repl/optime.h"
#include "mongo/s/catalog/catalog_manager_common.h"
#include "mongo/stdx/mutex.h"
namespace mongo {
class NamespaceString;
struct ReadPreferenceSetting;
class VersionType;
/**
* Implements the catalog manager for talking to replica set config servers.
*/
class CatalogManagerReplicaSet final : public CatalogManagerCommon {
public:
explicit CatalogManagerReplicaSet(std::unique_ptr<DistLockManager> distLockManager);
virtual ~CatalogManagerReplicaSet();
ConfigServerMode getMode() override {
return ConfigServerMode::CSRS;
}
/**
* Safe to call multiple times as long as they
*/
Status startup(OperationContext* txn, bool allowNetworking) override;
void shutDown(OperationContext* txn, bool allowNetworking) override;
Status shardCollection(OperationContext* txn,
const std::string& ns,
const ShardKeyPattern& fieldsAndOrder,
bool unique,
const std::vector<BSONObj>& initPoints,
const std::set<ShardId>& initShardsIds) override;
StatusWith<ShardDrainingStatus> removeShard(OperationContext* txn,
const std::string& name) override;
StatusWith<OpTimePair<DatabaseType>> getDatabase(OperationContext* txn,
const std::string& dbName) override;
StatusWith<OpTimePair<CollectionType>> getCollection(OperationContext* txn,
const std::string& collNs) override;
Status getCollections(OperationContext* txn,
const std::string* dbName,
std::vector<CollectionType>* collections,
repl::OpTime* optime) override;
Status dropCollection(OperationContext* txn, const NamespaceString& ns) override;
Status getDatabasesForShard(OperationContext* txn,
const std::string& shardName,
std::vector<std::string>* dbs) override;
Status getChunks(OperationContext* txn,
const BSONObj& query,
const BSONObj& sort,
boost::optional<int> limit,
std::vector<ChunkType>* chunks,
repl::OpTime* opTime) override;
Status getTagsForCollection(OperationContext* txn,
const std::string& collectionNs,
std::vector<TagsType>* tags) override;
StatusWith<std::string> getTagForChunk(OperationContext* txn,
const std::string& collectionNs,
const ChunkType& chunk) override;
StatusWith<OpTimePair<std::vector<ShardType>>> getAllShards(OperationContext* txn) override;
bool runUserManagementWriteCommand(OperationContext* txn,
const std::string& commandName,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder* result) override;
bool runUserManagementReadCommand(OperationContext* txn,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder* result) override;
Status applyChunkOpsDeprecated(OperationContext* txn,
const BSONArray& updateOps,
const BSONArray& preCondition) override;
StatusWith<SettingsType> getGlobalSettings(OperationContext* txn,
const std::string& key) override;
void writeConfigServerDirect(OperationContext* txn,
const BatchedCommandRequest& request,
BatchedCommandResponse* response) override;
Status insertConfigDocument(OperationContext* txn,
const std::string& ns,
const BSONObj& doc) override;
StatusWith<bool> updateConfigDocument(OperationContext* txn,
const std::string& ns,
const BSONObj& query,
const BSONObj& update,
bool upsert) override;
Status removeConfigDocuments(OperationContext* txn,
const std::string& ns,
const BSONObj& query) override;
DistLockManager* getDistLockManager() override;
Status initConfigVersion(OperationContext* txn) override;
Status appendInfoForConfigServerDatabases(OperationContext* txn,
BSONArrayBuilder* builder) override;
/**
* Runs a read command against the config server with majority read concern.
*/
bool runReadCommandForTest(OperationContext* txn,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder* result);
private:
Status _checkDbDoesNotExist(OperationContext* txn,
const std::string& dbName,
DatabaseType* db) override;
StatusWith<std::string> _generateNewShardName(OperationContext* txn) override;
Status _createCappedConfigCollection(OperationContext* txn,
StringData collName,
int cappedSize) override;
/**
* Helper method for running a read command against the config server. Automatically retries on
* NotMaster and network errors, so these will never be returned.
*/
StatusWith<BSONObj> _runReadCommand(OperationContext* txn,
const std::string& dbname,
const BSONObj& cmdObj,
const ReadPreferenceSetting& settings);
/**
* Helper method for running a count command against the config server with appropriate
* error handling.
*/
StatusWith<long long> _runCountCommandOnConfig(OperationContext* txn,
const NamespaceString& ns,
BSONObj query);
StatusWith<OpTimePair<std::vector<BSONObj>>> _exhaustiveFindOnConfig(
OperationContext* txn,
const ReadPreferenceSetting& readPref,
const NamespaceString& nss,
const BSONObj& query,
const BSONObj& sort,
boost::optional<long long> limit);
/**
* Appends a read committed read concern to the request object.
*/
void _appendReadConcern(BSONObjBuilder* builder);
/**
* Returns the current cluster schema/protocol version.
*/
StatusWith<VersionType> _getConfigVersion(OperationContext* txn);
/**
* Queries the config servers for the database metadata for the given database, using the
* given read preference. Returns NamespaceNotFound if no database metadata is found.
*/
StatusWith<OpTimePair<DatabaseType>> _fetchDatabaseMetadata(
OperationContext* txn, const std::string& dbName, const ReadPreferenceSetting& readPref);
//
// All member variables are labeled with one of the following codes indicating the
// synchronization rules for accessing them.
//
// (M) Must hold _mutex for access.
// (R) Read only, can only be written during initialization.
//
stdx::mutex _mutex;
// Distribted lock manager singleton.
std::unique_ptr<DistLockManager> _distLockManager; // (R)
// True if shutDown() has been called. False, otherwise.
bool _inShutdown = false; // (M)
// Last known highest opTime from the config server.
repl::OpTime _configOpTime; // (M)
};
} // namespace mongo
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