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 <vector> 34 35 #include "mongo/base/status_with.h" 36 37 #include "mongo/db/jsobj.h" 38 #include "mongo/db/namespace_string.h" 39 40 namespace mongo { 41 42 /** 43 * Provides support for parsing and serialization of arguments to the config server mergeChunk 44 * command. 45 */ 46 class MergeChunkRequest { 47 public: 48 MergeChunkRequest(NamespaceString nss, 49 std::string shardName, 50 OID epoch, 51 std::vector<BSONObj> chunkBoundaries); 52 53 /** 54 * Parses the provided BSON content as the internal _configsvrCommitChunkMerge command, and if 55 * it contains the correct types, constructs a MergeChunkRequest object from it. 56 * 57 * { 58 * _configsvrCommitChunkMerge: <NamespaceString nss>, 59 * collEpoch: <OID epoch>, 60 * chunkBoundaries: [ 61 * <BSONObj key1>, 62 * <BSONObj key2>, 63 * ... 64 * ], 65 * shard: <string shard> 66 * } 67 */ 68 static StatusWith<MergeChunkRequest> parseFromConfigCommand(const BSONObj& cmdObj); 69 70 /** 71 * Creates a BSONObjBuilder and uses it to create and return a BSONObj from this 72 * MergeChunkRequest instance. Calls appendAsConfigCommand and tacks on the passed-in 73 * writeConcern. 74 */ 75 BSONObj toConfigCommandBSON(const BSONObj& writeConcern); 76 77 /** 78 * Creates a serialized BSONObj of the internal _configsvCommitChunkMerge command from this 79 * MergeChunkRequest instance. 80 */ 81 void appendAsConfigCommand(BSONObjBuilder* cmdBuilder); 82 getNamespace()83 const NamespaceString& getNamespace() const { 84 return _nss; 85 } 86 getEpoch()87 const OID& getEpoch() const { 88 return _epoch; 89 } 90 getChunkBoundaries()91 const std::vector<BSONObj>& getChunkBoundaries() const { 92 return _chunkBoundaries; 93 } 94 getShardName()95 const std::string& getShardName() const { 96 return _shardName; 97 } 98 99 private: 100 NamespaceString _nss; 101 OID _epoch; 102 103 // The boundaries of the chunks to be merged. 104 std::vector<BSONObj> _chunkBoundaries; 105 106 std::string _shardName; 107 }; 108 109 } // namespace mongo 110