mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-03 14:52:53 +00:00
76c834e441
Summary:
... to follow modern C++ style / idioms.
Used this hack:
```
for FILE in `cat my_list_of_files`; do perl -pi -e 'BEGIN{undef $/;} s/ virtual( [^;{]* override)/$1/smg' $FILE; done
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12319
Test Plan: existing tests, CI
Reviewed By: jaykorean
Differential Revision: D53275303
Pulled By: pdillinger
fbshipit-source-id: bc0881af270aa8ef4d0ae4f44c5a6614b6407377
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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/**
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* A TEST MergeOperator for rocksdb that implements string append.
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* It is built using the MergeOperator interface rather than the simpler
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* AssociativeMergeOperator interface. This is useful for testing/benchmarking.
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* While the two operators are semantically the same, all production code
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* should use the StringAppendOperator defined in stringappend.{h,cc}. The
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* operator defined in the present file is primarily for testing.
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*
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* @author Deon Nicholas (dnicholas@fb.com)
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* Copyright 2013 Facebook
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*/
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#pragma once
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#include <deque>
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#include <string>
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/slice.h"
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namespace ROCKSDB_NAMESPACE {
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class StringAppendTESTOperator : public MergeOperator {
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public:
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// Constructor with delimiter
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explicit StringAppendTESTOperator(char delim_char);
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explicit StringAppendTESTOperator(const std::string& delim);
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bool FullMergeV2(const MergeOperationInput& merge_in,
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MergeOperationOutput* merge_out) const override;
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bool PartialMergeMulti(const Slice& key,
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const std::deque<Slice>& operand_list,
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std::string* new_value, Logger* logger) const override;
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static const char* kClassName() { return "StringAppendTESTOperator"; }
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static const char* kNickName() { return "stringappendtest"; }
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const char* Name() const override { return kClassName(); }
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const char* NickName() const override { return kNickName(); }
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private:
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// A version of PartialMerge that actually performs "partial merging".
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// Use this to simulate the exact behaviour of the StringAppendOperator.
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bool _AssocPartialMergeMulti(const Slice& key,
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const std::deque<Slice>& operand_list,
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std::string* new_value, Logger* logger) const;
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std::string delim_; // The delimiter is inserted between elements
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};
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} // namespace ROCKSDB_NAMESPACE
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