91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/************************************************************************
|
|
*
|
|
* Copyright (c) 2016 Alibaba.com, Inc. All Rights Reserved
|
|
* $Id: rd_paxos_log.h,v 1.0 08/15/2016 02:46:50 PM hangfeng.fj(hangfeng.fj@alibaba-inc.com) $
|
|
*
|
|
************************************************************************/
|
|
|
|
/**
|
|
* @file rd_paxos_log.h
|
|
* @author hangfeng.fj(hangfeng.fj@alibaba-inc.com)
|
|
* @date 08/15/2016 02:15:50 PM
|
|
* @version 1.0
|
|
* @brief
|
|
*
|
|
**/
|
|
|
|
#ifndef cluster_rd_paxos_log_INC
|
|
#define cluster_rd_paxos_log_INC
|
|
|
|
#include <mutex>
|
|
#include <atomic>
|
|
#include <map>
|
|
#include <string>
|
|
#include "paxos_log.h"
|
|
#include "paxos.h"
|
|
|
|
namespace rocksdb
|
|
{
|
|
class DB;
|
|
}
|
|
|
|
namespace alisql
|
|
{
|
|
|
|
/**
|
|
* @class RDPaxosLog
|
|
*
|
|
* @brief class for RocksDB Paxos Log
|
|
*
|
|
**/
|
|
class RDPaxosLog : public PaxosLog {
|
|
public:
|
|
RDPaxosLog(const std::string &dataDir, bool compress, size_t writeBufferSize, bool sync=true);
|
|
virtual ~RDPaxosLog();
|
|
|
|
virtual int getEntry(uint64_t logIndex, LogEntry &entry, bool fastfail= false);
|
|
virtual int getEmptyEntry(LogEntry &entry);
|
|
virtual uint64_t getLastLogIndex();
|
|
virtual uint64_t append(const LogEntry &entry);
|
|
virtual void truncateBackward(uint64_t firstIndex);
|
|
virtual void truncateForward(uint64_t lastIndex);
|
|
virtual int getMetaData(const std::string &key, std::string &value);
|
|
virtual int setMetaData(const std::string &key, const std::string &value);
|
|
virtual int getMetaData(const std::string &key, uint64_t *value);
|
|
virtual int setMetaData(const std::string &key, const uint64_t value);
|
|
virtual uint64_t append(const ::google::protobuf::RepeatedPtrField<LogEntry> &entries);
|
|
virtual uint64_t getLastLogTerm();
|
|
|
|
uint64_t getFirstLogIndex();
|
|
void appendEmptyEntry();
|
|
virtual uint64_t getLength();
|
|
bool readEntry(uint64_t index, LogEntry *logEntry);
|
|
uint64_t appendEntry(const LogEntry &logEntry);
|
|
static uint64_t stringToInt(const std::string &s);
|
|
static std::string intToString(uint64_t num);
|
|
static void intToString(uint64_t num, std::string &key);
|
|
void encodeLogEntry(const LogEntry &logEntry, std::string *buf);
|
|
void decodeLogEntry(const std::string &buf, LogEntry *logEntry);
|
|
|
|
void set_debug_async() {async_= true;}
|
|
|
|
void setPurgeLogFilter(std::function<bool(const LogEntry &le)> cb) {purgeLogFilter_ = cb;}
|
|
void debugSetLastLogIndex(uint i) {std::lock_guard<std::mutex> lg(lock_);firstLogIndex_= lastLogIndex_= i;}
|
|
|
|
private:
|
|
void initLastLogTerm();
|
|
rocksdb::DB* db_;
|
|
uint64_t lastLogIndex_;
|
|
uint64_t lastLogTerm_;
|
|
/* log index we purge from */
|
|
std::atomic<uint64_t> firstLogIndex_;
|
|
bool async_;
|
|
bool sync_;
|
|
|
|
std::function<bool(const LogEntry &le)> purgeLogFilter_; /* act as a filter for purging log */
|
|
};/* end of class RDPaxosLog */
|
|
|
|
};/* end of namespace alisql */
|
|
|
|
#endif //#ifndef cluster_rd_paxos_log_INC
|