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++
/**
|
|
* A MergeOperator for rocksdb that implements string append.
|
|
* @author Deon Nicholas (dnicholas@fb.com)
|
|
* Copyright 2013 Facebook
|
|
*/
|
|
|
|
#pragma once
|
|
#include "rocksdb/merge_operator.h"
|
|
#include "rocksdb/slice.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
class StringAppendOperator : public AssociativeMergeOperator {
|
|
public:
|
|
// Constructor: specify delimiter
|
|
explicit StringAppendOperator(char delim_char);
|
|
|
|
virtual bool Merge(const Slice& key,
|
|
const Slice* existing_value,
|
|
const Slice& value,
|
|
std::string* new_value,
|
|
Logger* logger) const override;
|
|
|
|
virtual const char* Name() const override;
|
|
|
|
private:
|
|
char delim_; // The delimiter is inserted between elements
|
|
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|