fork of https://github.com/rust-rocksdb/rust-rocksdb for nextgraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.4 KiB
41 lines
1.4 KiB
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#pragma once
|
|
#include <memory>
|
|
|
|
#include "rocksdb/compaction_filter.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
// Abstract base class for building layered compaction filter on top of
|
|
// user compaction filter.
|
|
// See BlobIndexCompactionFilter or TtlCompactionFilter for a basic usage.
|
|
class LayeredCompactionFilterBase : public CompactionFilter {
|
|
public:
|
|
LayeredCompactionFilterBase(
|
|
const CompactionFilter* _user_comp_filter,
|
|
std::unique_ptr<const CompactionFilter> _user_comp_filter_from_factory)
|
|
: user_comp_filter_(_user_comp_filter),
|
|
user_comp_filter_from_factory_(
|
|
std::move(_user_comp_filter_from_factory)) {
|
|
if (!user_comp_filter_) {
|
|
user_comp_filter_ = user_comp_filter_from_factory_.get();
|
|
}
|
|
}
|
|
|
|
// Return a pointer to user compaction filter
|
|
const CompactionFilter* user_comp_filter() const { return user_comp_filter_; }
|
|
|
|
const Customizable* Inner() const override { return user_comp_filter_; }
|
|
|
|
protected:
|
|
const CompactionFilter* user_comp_filter_;
|
|
|
|
private:
|
|
std::unique_ptr<const CompactionFilter> user_comp_filter_from_factory_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|