blob: d35a2211397709bf84208378f795b36bd0fef77b (
plain) (
blame)
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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <memory>
namespace proton {
class DocumentSubDBReconfig;
/**
* Class representing the result of the prepare step of a DocumentDB reconfig.
*
* The reconfig is performed in three steps:
* Prepare:
* Based on the config that is changed, new components are instantiated in each subdb.
* This can be costly and is handled by helper threads from the shared executor pool.
*
* Complete prepare:
* Docid limit and serial number are used to complete prepared reconfig.
*
* Apply:
* The new components are swapped with the old ones in the DocumentDB master write thread.
*/
class DocumentDBReconfig {
private:
std::unique_ptr<DocumentSubDBReconfig> _ready_reconfig;
std::unique_ptr<DocumentSubDBReconfig> _not_ready_reconfig;
public:
DocumentDBReconfig(std::unique_ptr<DocumentSubDBReconfig> ready_reconfig_in,
std::unique_ptr<DocumentSubDBReconfig> not_ready_reconfig_in);
~DocumentDBReconfig();
const DocumentSubDBReconfig& ready_reconfig() const noexcept { return *_ready_reconfig; }
DocumentSubDBReconfig& ready_reconfig() noexcept { return *_ready_reconfig; }
const DocumentSubDBReconfig& not_ready_reconfig() const noexcept { return *_not_ready_reconfig; }
DocumentSubDBReconfig& not_ready_reconfig() noexcept { return *_not_ready_reconfig; }
};
}
|