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/base/disallow_copying.h"
34 #include "mongo/s/client/rs_local_client.h"
35 #include "mongo/s/client/shard.h"
36 
37 namespace mongo {
38 
39 class ShardLocal : public Shard {
40     MONGO_DISALLOW_COPYING(ShardLocal);
41 
42 public:
43     explicit ShardLocal(const ShardId& id);
44 
45     ~ShardLocal() = default;
46 
47     /**
48      * These functions are implemented for the Shard interface's sake. They should not be called on
49      * ShardLocal because doing so triggers invariants.
50      */
51     const ConnectionString getConnString() const override;
52     const ConnectionString originalConnString() const override;
53     std::shared_ptr<RemoteCommandTargeter> getTargeter() const override;
54     void updateReplSetMonitor(const HostAndPort& remoteHost,
55                               const Status& remoteCommandStatus) override;
56 
57     std::string toString() const override;
58 
59     bool isRetriableError(ErrorCodes::Error code, RetryPolicy options) final;
60 
61     Status createIndexOnConfig(OperationContext* opCtx,
62                                const NamespaceString& ns,
63                                const BSONObj& keys,
64                                bool unique) override;
65 
66 private:
67     StatusWith<Shard::CommandResponse> _runCommand(OperationContext* opCtx,
68                                                    const ReadPreferenceSetting& unused,
69                                                    const std::string& dbName,
70                                                    Milliseconds maxTimeMSOverrideUnused,
71                                                    const BSONObj& cmdObj) final;
72 
73     StatusWith<Shard::QueryResponse> _exhaustiveFindOnConfig(
74         OperationContext* opCtx,
75         const ReadPreferenceSetting& readPref,
76         const repl::ReadConcernLevel& readConcernLevel,
77         const NamespaceString& nss,
78         const BSONObj& query,
79         const BSONObj& sort,
80         boost::optional<long long> limit) final;
81 
82     RSLocalClient _rsLocalClient;
83 };
84 
85 }  // namespace mongo
86