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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 <string>
#include "mongo/client/connection_string.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/s/migration_session_id.h"
#include "mongo/db/session/logical_session_id.h"
#include "mongo/db/shard_id.h"
#include "mongo/s/request_types/migration_secondary_throttle_options.h"
namespace mongo {
class BSONObjBuilder;
template <typename T>
class StatusWith;
/**
* Parses the arguments for a start chunk clone operation.
*/
class StartChunkCloneRequest {
public:
static constexpr auto kSupportsCriticalSectionDuringCatchUp =
"supportsCriticalSectionDuringCatchUp"_sd;
/**
* Parses the input command and produces a request corresponding to its arguments.
*/
static StatusWith<StartChunkCloneRequest> createFromCommand(NamespaceString nss,
const BSONObj& obj);
/**
* Constructs a start chunk clone command with the specified parameters and writes it to the
* builder, without closing the builder. The builder must be empty, but callers are free to
* append more fields once the command has been constructed.
*/
static void appendAsCommand(BSONObjBuilder* builder,
const NamespaceString& nss,
const UUID& migrationId,
const LogicalSessionId& lsid,
TxnNumber txnNumber,
const MigrationSessionId& sessionId,
const ConnectionString& fromShardConnectionString,
const ShardId& fromShardId,
const ShardId& toShardId,
const BSONObj& chunkMinKey,
const BSONObj& chunkMaxKey,
const BSONObj& shardKeyPattern,
const MigrationSecondaryThrottleOptions& secondaryThrottle);
const NamespaceString& getNss() const {
return _nss;
}
const MigrationSessionId& getSessionId() const {
return _sessionId;
}
const ConnectionString& getFromShardConnectionString() const {
return _fromShardCS;
}
bool hasMigrationId() const {
return _migrationId.is_initialized();
}
bool parallelFetchingSupported() const {
return _parallelFetchingSupported;
}
const UUID& getMigrationId() const {
invariant(_migrationId);
return *_migrationId;
}
const LogicalSessionId& getLsid() const {
return _lsid;
}
TxnNumber getTxnNumber() const {
return _txnNumber;
}
const ShardId& getFromShardId() const {
return _fromShardId;
}
const ShardId& getToShardId() const {
return _toShardId;
}
const BSONObj& getMinKey() const {
return _minKey;
}
const BSONObj& getMaxKey() const {
return _maxKey;
}
const BSONObj& getShardKeyPattern() const {
return _shardKeyPattern;
}
const MigrationSecondaryThrottleOptions& getSecondaryThrottle() const {
return _secondaryThrottle;
}
private:
StartChunkCloneRequest(NamespaceString nss,
MigrationSessionId sessionId,
MigrationSecondaryThrottleOptions secondaryThrottle);
// The collection for which this request applies
NamespaceString _nss;
boost::optional<UUID> _migrationId;
LogicalSessionId _lsid;
TxnNumber _txnNumber{kUninitializedTxnNumber};
// The session id of this migration
MigrationSessionId _sessionId;
// The source host and port
ConnectionString _fromShardCS;
// The recipient and destination shard IDs.
ShardId _fromShardId;
ShardId _toShardId;
// Exact min and max key of the chunk being moved
BSONObj _minKey;
BSONObj _maxKey;
// Shard key pattern used by the collection
BSONObj _shardKeyPattern;
// The parsed secondary throttle options
MigrationSecondaryThrottleOptions _secondaryThrottle;
bool _parallelFetchingSupported;
};
} // namespace mongo
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