blob: 452164d8e57850c1bc0b157407667de75f45ba7f (
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
47
48
49
|
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
/**
* A TEST MergeOperator for rocksdb that implements string append.
* It is built using the MergeOperator interface rather than the simpler
* AssociativeMergeOperator interface. This is useful for testing/benchmarking.
* While the two operators are semantically the same, all production code
* should use the StringAppendOperator defined in stringappend.{h,cc}. The
* operator defined in the present file is primarily for testing.
*
* @author Deon Nicholas (dnicholas@fb.com)
* Copyright 2013 Facebook
*/
#pragma once
#include <deque>
#include <string>
#include "rocksdb/merge_operator.h"
#include "rocksdb/slice.h"
namespace ROCKSDB_NAMESPACE {
class StringAppendTESTOperator : public MergeOperator {
public:
// Constructor with delimiter
explicit StringAppendTESTOperator(char delim_char);
virtual bool FullMergeV2(const MergeOperationInput& merge_in,
MergeOperationOutput* merge_out) const override;
virtual bool PartialMergeMulti(const Slice& key,
const std::deque<Slice>& operand_list,
std::string* new_value, Logger* logger) const
override;
virtual const char* Name() const override;
private:
// A version of PartialMerge that actually performs "partial merging".
// Use this to simulate the exact behaviour of the StringAppendOperator.
bool _AssocPartialMergeMulti(const Slice& key,
const std::deque<Slice>& operand_list,
std::string* new_value, Logger* logger) const;
char delim_; // The delimiter is inserted between elements
};
} // namespace ROCKSDB_NAMESPACE
|
