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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/executor/network_connection_hook.h"
namespace mongo {
/**
* An implementation of NetworkConnectionHook for handling sharding-specific operations such
* as sending sharding initialization information to shards and maintaining this process' notion of
* the config server optime.
*/
class ShardingNetworkConnectionHook final : public executor::NetworkConnectionHook {
public:
ShardingNetworkConnectionHook() = default;
virtual ~ShardingNetworkConnectionHook() = default;
/**
* Checks that the given host is valid to be used in this sharded cluster, based on its
* isMaster response.
*/
Status validateHost(const HostAndPort& remoteHost,
const BSONObj& request,
const executor::RemoteCommandResponse& isMasterReply) override;
/**
* Implementation of validateHost can be called without a ShardingNetworkConnectionHook
* instance.
*/
static Status validateHostImpl(const HostAndPort& remoteHost,
const executor::RemoteCommandResponse& isMasterReply);
/**
* Makes a SetShardVersion request for initializing sharding information on the new connection.
*/
StatusWith<boost::optional<executor::RemoteCommandRequest>> makeRequest(
const HostAndPort& remoteHost) override;
/**
* Confirms that the SetShardVersion request made in makeRequest ran successfully.
*/
Status handleReply(const HostAndPort& remoteHost,
executor::RemoteCommandResponse&& response) override;
};
} // namespace mongo
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