mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-28 05:43:50 +00:00
d057e8326d
Summary: - Changed MergeOperator, CompactionFilter, and CompactionFilterFactory into Customizable classes. - Added Options/Configurable/Object Registration for TTL and Cassandra variants - Changed the StringAppend MergeOperators to accept a string delimiter rather than a simple char. Made the delimiter into a configurable option - Added tests for new functionality Pull Request resolved: https://github.com/facebook/rocksdb/pull/8481 Reviewed By: zhichao-cao Differential Revision: D30136050 Pulled By: mrambacher fbshipit-source-id: 271d1772835935b6773abaf018ee71e42f9491af
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright (c) 2017-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
#include "rocksdb/merge_operator.h"
|
|
#include "rocksdb/slice.h"
|
|
#include "utilities/cassandra/cassandra_options.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
namespace cassandra {
|
|
|
|
/**
|
|
* A MergeOperator for rocksdb that implements Cassandra row value merge.
|
|
*/
|
|
class CassandraValueMergeOperator : public MergeOperator {
|
|
public:
|
|
explicit CassandraValueMergeOperator(int32_t gc_grace_period_in_seconds,
|
|
size_t operands_limit = 0);
|
|
|
|
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;
|
|
|
|
const char* Name() const override { return kClassName(); }
|
|
static const char* kClassName() { return "CassandraValueMergeOperator"; }
|
|
|
|
virtual bool AllowSingleOperand() const override { return true; }
|
|
|
|
virtual bool ShouldMerge(const std::vector<Slice>& operands) const override {
|
|
return options_.operands_limit > 0 &&
|
|
operands.size() >= options_.operands_limit;
|
|
}
|
|
|
|
private:
|
|
CassandraOptions options_;
|
|
};
|
|
} // namespace cassandra
|
|
} // namespace ROCKSDB_NAMESPACE
|