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/**
* Copyright (C) 2016 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/write_concern_options.h"
namespace mongo {
class MigrationSecondaryThrottleOptions;
template <typename T>
class StatusWith;
class OperationContext;
/**
* Returns the default write concern for migration cleanup on the donor shard and for cloning
* documents on the destination shard.
*/
class ChunkMoveWriteConcernOptions {
public:
/**
* Based on the type of the server (standalone or replica set) and the requested secondary
* throttle options returns what write concern should be used locally both for writing migrated
* documents and for performing range deletions.
*
* Returns a non-OK status if the requested write concern cannot be satisfied for some reason.
*
* These are the rules for determining the local write concern to be used:
* - secondaryThrottle is not specified (kDefault) or it is on (kOn), but there is no custom
* write concern:
* - if replication is enabled and there are 2 or more nodes - w:2, j:false, timeout:60000
* - if replication is not enabled or less than 2 nodes - w:1, j:false, timeout:0
* - secondaryThrottle is off (kOff): w:1, j:false, timeout:0
* - secondaryThrottle is on (kOn) and there is custom write concern, use the custom write
* concern.
*/
static StatusWith<WriteConcernOptions> getEffectiveWriteConcern(
OperationContext* opCtx, const MigrationSecondaryThrottleOptions& options);
};
} // namespace mongo
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