rocksdb/include/utilities/stackable_db.h
Igor Canadi f868dcbbed Support for adding TTL-ed column family
Summary:
This enables user to add a TTL column family to normal DB.

Next step should be to expand StackableDB and create StackableColumnFamily, such that users can for example add geo-spatial column families to normal DB.

Test Plan: added a test

Reviewers: dhruba, haobo, ljin

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18201
2014-04-28 20:34:20 -07:00

216 lines
6.8 KiB
C++

// 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 "rocksdb/db.h"
namespace rocksdb {
// This class contains APIs to stack rocksdb wrappers.Eg. Stack TTL over base d
class StackableDB : public DB {
public:
// StackableDB is the owner of db now!
explicit StackableDB(DB* db) : db_(db) {}
~StackableDB() {
delete db_;
}
virtual DB* GetBaseDB() {
return db_;
}
virtual Status CreateColumnFamily(const ColumnFamilyOptions& options,
const std::string& column_family_name,
ColumnFamilyHandle** handle) {
return db_->CreateColumnFamily(options, column_family_name, handle);
}
virtual Status DropColumnFamily(ColumnFamilyHandle* column_family) {
return db_->DropColumnFamily(column_family);
}
using DB::Put;
virtual Status Put(const WriteOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
const Slice& val) override {
return db_->Put(options, column_family, key, val);
}
using DB::Get;
virtual Status Get(const ReadOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
std::string* value) override {
return db_->Get(options, column_family, key, value);
}
using DB::MultiGet;
virtual std::vector<Status> MultiGet(
const ReadOptions& options,
const std::vector<ColumnFamilyHandle*>& column_family,
const std::vector<Slice>& keys,
std::vector<std::string>* values) override {
return db_->MultiGet(options, column_family, keys, values);
}
using DB::KeyMayExist;
virtual bool KeyMayExist(const ReadOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
std::string* value,
bool* value_found = nullptr) override {
return db_->KeyMayExist(options, column_family, key, value, value_found);
}
using DB::Delete;
virtual Status Delete(const WriteOptions& wopts,
ColumnFamilyHandle* column_family,
const Slice& key) override {
return db_->Delete(wopts, column_family, key);
}
using DB::Merge;
virtual Status Merge(const WriteOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
const Slice& value) override {
return db_->Merge(options, column_family, key, value);
}
virtual Status Write(const WriteOptions& opts, WriteBatch* updates)
override {
return db_->Write(opts, updates);
}
using DB::NewIterator;
virtual Iterator* NewIterator(const ReadOptions& opts,
ColumnFamilyHandle* column_family) override {
return db_->NewIterator(opts, column_family);
}
virtual Status NewIterators(
const ReadOptions& options,
const std::vector<ColumnFamilyHandle*>& column_families,
std::vector<Iterator*>* iterators) {
return db_->NewIterators(options, column_families, iterators);
}
virtual const Snapshot* GetSnapshot() override {
return db_->GetSnapshot();
}
virtual void ReleaseSnapshot(const Snapshot* snapshot) override {
return db_->ReleaseSnapshot(snapshot);
}
using DB::GetProperty;
virtual bool GetProperty(ColumnFamilyHandle* column_family,
const Slice& property, std::string* value) override {
return db_->GetProperty(column_family, property, value);
}
using DB::GetApproximateSizes;
virtual void GetApproximateSizes(ColumnFamilyHandle* column_family,
const Range* r, int n,
uint64_t* sizes) override {
return db_->GetApproximateSizes(column_family, r, n, sizes);
}
using DB::CompactRange;
virtual Status CompactRange(ColumnFamilyHandle* column_family,
const Slice* begin, const Slice* end,
bool reduce_level = false,
int target_level = -1) override {
return db_->CompactRange(column_family, begin, end, reduce_level,
target_level);
}
using DB::NumberLevels;
virtual int NumberLevels(ColumnFamilyHandle* column_family) override {
return db_->NumberLevels(column_family);
}
using DB::MaxMemCompactionLevel;
virtual int MaxMemCompactionLevel(ColumnFamilyHandle* column_family)
override {
return db_->MaxMemCompactionLevel(column_family);
}
using DB::Level0StopWriteTrigger;
virtual int Level0StopWriteTrigger(ColumnFamilyHandle* column_family)
override {
return db_->Level0StopWriteTrigger(column_family);
}
virtual const std::string& GetName() const override {
return db_->GetName();
}
virtual Env* GetEnv() const override {
return db_->GetEnv();
}
using DB::GetOptions;
virtual const Options& GetOptions(ColumnFamilyHandle* column_family) const
override {
return db_->GetOptions(column_family);
}
using DB::Flush;
virtual Status Flush(const FlushOptions& fopts,
ColumnFamilyHandle* column_family) override {
return db_->Flush(fopts, column_family);
}
virtual Status DisableFileDeletions() override {
return db_->DisableFileDeletions();
}
virtual Status EnableFileDeletions(bool force) override {
return db_->EnableFileDeletions(force);
}
virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
bool flush_memtable = true) override {
return db_->GetLiveFiles(vec, mfs, flush_memtable);
}
virtual SequenceNumber GetLatestSequenceNumber() const override {
return db_->GetLatestSequenceNumber();
}
virtual Status GetSortedWalFiles(VectorLogPtr& files) override {
return db_->GetSortedWalFiles(files);
}
virtual Status DeleteFile(std::string name) override {
return db_->DeleteFile(name);
}
virtual Status GetDbIdentity(std::string& identity) {
return db_->GetDbIdentity(identity);
}
using DB::GetPropertiesOfAllTables;
virtual Status GetPropertiesOfAllTables(ColumnFamilyHandle* column_family,
TablePropertiesCollection* props) {
return db_->GetPropertiesOfAllTables(column_family, props);
}
virtual Status GetUpdatesSince(
SequenceNumber seq_number, unique_ptr<TransactionLogIterator>* iter,
const TransactionLogIterator::ReadOptions& read_options) override {
return db_->GetUpdatesSince(seq_number, iter, read_options);
}
virtual ColumnFamilyHandle* DefaultColumnFamily() const override {
return db_->DefaultColumnFamily();
}
protected:
DB* db_;
};
} // namespace rocksdb