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fdf882ded2
Summary: When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433 Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag. Differential Revision: D19977691 fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
32 lines
802 B
C++
32 lines
802 B
C++
/**
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* A MergeOperator for rocksdb that implements string append.
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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 "rocksdb/merge_operator.h"
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#include "rocksdb/slice.h"
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namespace ROCKSDB_NAMESPACE {
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class StringAppendOperator : public AssociativeMergeOperator {
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public:
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// Constructor: specify delimiter
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explicit StringAppendOperator(char delim_char);
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virtual bool Merge(const Slice& key,
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const Slice* existing_value,
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const Slice& value,
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std::string* new_value,
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Logger* logger) const override;
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virtual const char* Name() const override;
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private:
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char delim_; // The delimiter is inserted between elements
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};
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} // namespace ROCKSDB_NAMESPACE
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