/
scan_context.cc
63 lines (54 loc) · 2.07 KB
/
scan_context.cc
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
/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2019-Present Couchbase, Inc.
*
* Use of this software is governed by the Business Source License included
* in the file licenses/BSL-Couchbase.txt. As of the Change Date specified
* in that file, in accordance with the Business Source License, use of this
* software will be governed by the Apache License, Version 2.0, included in
* the file licenses/APL2.txt.
*/
#include "collections/scan_context.h"
#include "collections/kvstore.h"
#include "systemevent_factory.h"
namespace Collections::VB {
ScanContext::ScanContext(
const std::vector<Collections::KVStore::DroppedCollection>&
droppedCollections) {
for (const auto& droppedCollection : droppedCollections) {
dropped.insert(droppedCollection.collectionId);
// Find the full extent of dropped collections, we will only map lookup
// for keys inside the range.
startSeqno =
std::min<uint64_t>(startSeqno, droppedCollection.startSeqno);
endSeqno = std::max<uint64_t>(endSeqno, droppedCollection.endSeqno);
}
}
bool ScanContext::isLogicallyDeleted(const DocKey& key, uint64_t seqno) const {
if (dropped.empty()) {
return false;
}
CollectionID cid;
if (key.isInSystemCollection()) {
auto modify = SystemEventFactory::isModifyCollection(key);
if (!modify) {
return false;
}
cid = modify.value();
} else {
cid = key.getCollectionID();
}
// Is the key in a range which contains dropped collections and in the set?
return (seqno >= startSeqno && seqno <= endSeqno) && dropped.count(cid) > 0;
}
std::ostream& operator<<(std::ostream& os, const ScanContext& scanContext) {
os << "ScanContext: startSeqno:" << scanContext.startSeqno
<< ", endSeqno:" << scanContext.endSeqno;
os << " dropped:[";
for (CollectionID cid : scanContext.dropped) {
os << cid.to_string() << ", ";
}
os << "]";
return os;
}
} // namespace Collections::VB