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b6640c3117
Summary: The primary purpose of the FactoryFunc was to support LITE mode where the ObjectRegistry was not available. With the removal of LITE mode, the function was no longer required. Note that the MergeOperator had some private classes defined in header files. To gain access to their constructors (and name methods), the class definitions were moved into header files. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11203 Reviewed By: cbi42 Differential Revision: D43160255 Pulled By: pdillinger fbshipit-source-id: f3a465fd5d1a7049b73ecf31e4b8c3762f6dae6c
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// A 'model' merge operator with uint64 addition semantics
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// Implemented as an AssociativeMergeOperator for simplicity and example.
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#pragma once
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#include "rocksdb/merge_operator.h"
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#include "utilities/merge_operators.h"
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namespace ROCKSDB_NAMESPACE {
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class Logger;
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class Slice;
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class UInt64AddOperator : public AssociativeMergeOperator {
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public:
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static const char* kClassName() { return "UInt64AddOperator"; }
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static const char* kNickName() { return "uint64add"; }
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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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bool Merge(const Slice& /*key*/, const Slice* existing_value,
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const Slice& value, std::string* new_value,
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Logger* logger) const override;
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private:
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// Takes the string and decodes it into a uint64_t
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// On error, prints a message and returns 0
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uint64_t DecodeInteger(const Slice& value, Logger* logger) const;
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};
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} // namespace ROCKSDB_NAMESPACE
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