blob: cdb42e59fd01eec92af32003bd1d116491b885cd (
plain)
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
|
/**
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "mongo/db/diskloc.h"
namespace mongo {
struct CollectionScanParams {
enum Direction {
FORWARD,
BACKWARD,
};
CollectionScanParams() : start(DiskLoc()),
direction(FORWARD),
tailable(false) { }
// What collection?
string ns;
// isNull by default. If you specify any value for this, you're responsible for the DiskLoc
// not being invalidated before the first call to work(...).
DiskLoc start;
Direction direction;
// Do we want the scan to be 'tailable'? Only meaningful if the collection is capped.
bool tailable;
};
} // namespace mongo
|
