fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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.
100 lines
2.8 KiB
100 lines
2.8 KiB
// 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.
|
|
|
|
#ifndef LEVELDB_UTILITIES_TTL_DB_TTL_H_
|
|
#define LEVELDB_UTILITIES_TTL_DB_TTL_H_
|
|
|
|
#include "include/leveldb/db.h"
|
|
#include "db/db_impl.h"
|
|
|
|
namespace leveldb {
|
|
|
|
class DBWithTTL : public DB {
|
|
public:
|
|
DBWithTTL(const int32_t ttl,
|
|
const Options& options,
|
|
const std::string& dbname,
|
|
Status& st);
|
|
|
|
virtual ~DBWithTTL();
|
|
|
|
virtual Status Put(const WriteOptions& o,
|
|
const Slice& key,
|
|
const Slice& val);
|
|
|
|
virtual Status Get(const ReadOptions& options,
|
|
const Slice& key,
|
|
std::string* value);
|
|
|
|
virtual Status Delete(const WriteOptions& wopts, const Slice& key);
|
|
|
|
virtual Status Merge(const WriteOptions& options,
|
|
const Slice& key,
|
|
const Slice& value);
|
|
|
|
|
|
virtual Status Write(const WriteOptions& opts, WriteBatch* updates);
|
|
|
|
virtual Iterator* NewIterator(const ReadOptions& opts);
|
|
|
|
virtual const Snapshot* GetSnapshot();
|
|
|
|
virtual void ReleaseSnapshot(const Snapshot* snapshot);
|
|
|
|
virtual bool GetProperty(const Slice& property, std::string* value);
|
|
|
|
virtual void GetApproximateSizes(const Range* r, int n, uint64_t* sizes);
|
|
|
|
virtual void CompactRange(const Slice* begin, const Slice* end);
|
|
|
|
virtual int NumberLevels();
|
|
|
|
virtual int MaxMemCompactionLevel();
|
|
|
|
virtual int Level0StopWriteTrigger();
|
|
|
|
virtual Status Flush(const FlushOptions& fopts);
|
|
|
|
virtual Status DisableFileDeletions();
|
|
|
|
virtual Status EnableFileDeletions();
|
|
|
|
virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs);
|
|
|
|
virtual SequenceNumber GetLatestSequenceNumber();
|
|
|
|
virtual Status GetUpdatesSince(SequenceNumber seq_number,
|
|
unique_ptr<TransactionLogIterator>* iter);
|
|
|
|
// Simulate a db crash, no elegant closing of database.
|
|
void TEST_Destroy_DBWithTtl();
|
|
|
|
static bool DeleteByTS(void* args,
|
|
int level,
|
|
const Slice& key,
|
|
const Slice& old_val,
|
|
std::string* new_val,
|
|
bool* value_changed);
|
|
|
|
static bool IsStale(const Slice& value, int32_t ttl);
|
|
|
|
static Status AppendTS(const Slice& val, std::string& val_with_ts);
|
|
|
|
static Status SanityCheckTimestamp(const std::string& str);
|
|
|
|
static Status StripTS(std::string* str);
|
|
|
|
static Status GetCurrentTime(int32_t& curtime);
|
|
|
|
static const int32_t kTSLength = sizeof(int32_t); // size of timestamp
|
|
|
|
static const int32_t kMinTimestamp = 1368146402; // 05/09/2013:5:40PM
|
|
|
|
private:
|
|
DB* db_;
|
|
int32_t ttl_;
|
|
};
|
|
|
|
}
|
|
#endif // LEVELDB_UTILITIES_TTL_DB_TTL_H_
|
|
|