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 <memory> 34 35 #include "mongo/db/logical_session_id.h" 36 #include "mongo/db/sessions_collection.h" 37 #include "mongo/util/time_support.h" 38 39 namespace mongo { 40 41 class OperationContext; 42 43 /** 44 * Accesses the sessions collection for mongos and shard servers. 45 */ 46 class SessionsCollectionSharded : public SessionsCollection { 47 public: 48 /** 49 * Ensures that the sessions collection exists, is sharded, 50 * and has the proper indexes. 51 */ 52 Status setupSessionsCollection(OperationContext* opCtx) override; 53 54 /** 55 * Checks if the sessions collection exists. Does not check if the index exists in the sharded 56 * version of this function. 57 */ 58 virtual Status checkSessionsCollectionExists(OperationContext* opCtx) override; 59 60 /** 61 * Updates the last-use times on the given sessions to be greater than 62 * or equal to the current time. 63 */ 64 Status refreshSessions(OperationContext* opCtx, 65 const LogicalSessionRecordSet& sessions) override; 66 67 /** 68 * Removes the authoritative records for the specified sessions. 69 */ 70 Status removeRecords(OperationContext* opCtx, const LogicalSessionIdSet& sessions) override; 71 72 StatusWith<LogicalSessionIdSet> findRemovedSessions( 73 OperationContext* opCtx, const LogicalSessionIdSet& sessions) override; 74 75 Status removeTransactionRecords(OperationContext* opCtx, 76 const LogicalSessionIdSet& sessions) override; 77 78 protected: 79 Status _checkCacheForSessionsCollection(OperationContext* opCtx); 80 }; 81 82 } // namespace mongo 83