1 2 /** 3 * Copyright (C) 2018-present MongoDB, Inc. 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the Server Side Public License, version 1, 7 * as published by MongoDB, Inc. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * Server Side Public License for more details. 13 * 14 * You should have received a copy of the Server Side Public License 15 * along with this program. If not, see 16 * <http://www.mongodb.com/licensing/server-side-public-license>. 17 * 18 * As a special exception, the copyright holders give permission to link the 19 * code of portions of this program with the OpenSSL library under certain 20 * conditions as described in each individual source file and distribute 21 * linked combinations including the program with the OpenSSL library. You 22 * must comply with the Server Side Public License in all respects for 23 * all of the code used other than as permitted herein. If you modify file(s) 24 * with this exception, you may extend this exception to your version of the 25 * file(s), but you are not obligated to do so. If you do not wish to do so, 26 * delete this exception statement from your version. If you delete this 27 * exception statement from all source files in the program, then also delete 28 * it in the license file. 29 */ 30 31 #pragma once 32 33 #include "mongo/executor/network_connection_hook.h" 34 35 namespace mongo { 36 37 /** 38 * An implementation of NetworkConnectionHook for handling sharding-specific operations such 39 * as sending sharding initialization information to shards and maintaining this process' notion of 40 * the config server optime. 41 */ 42 class ShardingNetworkConnectionHook final : public executor::NetworkConnectionHook { 43 public: 44 ShardingNetworkConnectionHook() = default; 45 virtual ~ShardingNetworkConnectionHook() = default; 46 47 /** 48 * Checks that the given host is valid to be used in this sharded cluster, based on its 49 * isMaster response. 50 */ 51 Status validateHost(const HostAndPort& remoteHost, 52 const executor::RemoteCommandResponse& isMasterReply) override; 53 54 /** 55 * Implementation of validateHost can be called without a ShardingNetworkConnectionHook 56 * instance. 57 */ 58 static Status validateHostImpl(const HostAndPort& remoteHost, 59 const executor::RemoteCommandResponse& isMasterReply); 60 61 /** 62 * Makes a SetShardVersion request for initializing sharding information on the new connection. 63 */ 64 StatusWith<boost::optional<executor::RemoteCommandRequest>> makeRequest( 65 const HostAndPort& remoteHost) override; 66 67 /** 68 * Confirms that the SetShardVersion request made in makeRequest ran successfully. 69 */ 70 Status handleReply(const HostAndPort& remoteHost, 71 executor::RemoteCommandResponse&& response) override; 72 }; 73 74 } // namespace mongo 75