1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/**
* Copyright (C) 2021-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/db/operation_context.h"
#include "mongo/db/repl/vote_commit_migration_progress_gen.h"
#include "mongo/util/future.h"
#include "mongo/util/uuid.h"
namespace mongo::repl {
/**
* Coordinate the nodes of the recipient shard during a multitenant migration that uses the "shard
* merge" protocol. Receives voteCommitMigrationProgress commands from all recipient nodes.
*/
class TenantMigrationRecipientCoordinator {
public:
static TenantMigrationRecipientCoordinator* get(ServiceContext* serviceContext);
static TenantMigrationRecipientCoordinator* get(OperationContext* operationContext);
TenantMigrationRecipientCoordinator() = default;
~TenantMigrationRecipientCoordinator() = default;
// Begin a tenant migration step. The returned future is resolved when all replica set members
// have completed the step, or there was an error.
SharedSemiFuture<void> beginAwaitingVotesForStep(UUID migrationId,
MigrationProgressStepEnum step);
// TODO (SERVER-63390): use cancelStep, which is currently unused.
void cancelStep(UUID migrationId, MigrationProgressStepEnum step);
void receivedVoteForStep(UUID migrationId,
MigrationProgressStepEnum step,
const HostAndPort& host,
bool success,
const boost::optional<StringData>& reason = boost::none);
void reset();
private:
void _reset(WithLock lk);
Mutex _mutex = MONGO_MAKE_LATCH("TenantMigrationRecipientCoordinator::_mutex");
boost::optional<UUID> _currentMigrationId;
MigrationProgressStepEnum _currentStep = MigrationProgressStepEnum::kNoStep;
stdx::unordered_set<HostAndPort> _readyMembers;
std::unique_ptr<SharedPromise<void>> _promise = std::make_unique<SharedPromise<void>>();
};
} // namespace mongo::repl
|
