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pika_server.h
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pika_server.h
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// Copyright (c) 2015-present, Qihoo, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifndef PIKA_SERVER_H_
#define PIKA_SERVER_H_
#include <vector>
#include <functional>
#include <map>
#include <unordered_set>
#include <sys/statfs.h>
#include <time.h>
#include "include/pika_binlog.h"
#include "include/pika_binlog_receiver_thread.h"
#include "include/pika_binlog_sender_thread.h"
#include "include/pika_heartbeat_thread.h"
#include "include/pika_slaveping_thread.h"
#include "include/pika_trysync_thread.h"
#include "include/pika_monitor_thread.h"
#include "include/pika_define.h"
#include "include/pika_binlog_bgworker.h"
#include "slash/include/slash_status.h"
#include "slash/include/slash_mutex.h"
#include "pink/include/bg_thread.h"
#include "pink/include/pink_pubsub.h"
#include "blackwidow/blackwidow.h"
#include "blackwidow/backupable.h"
using slash::Status;
using slash::Slice;
class PikaDispatchThread;
class PikaServer {
public:
PikaServer();
~PikaServer();
static uint64_t DiskSize(std::string path) {
struct statfs diskInfo;
int ret = statfs(path.c_str(), &diskInfo);
if (ret == -1) {
LOG(WARNING) << "Get DiskSize error: " << strerror(errno);
return 0;
}
return diskInfo.f_bsize * diskInfo.f_blocks;
}
/*
* Get & Set
*/
std::string host() {
return host_;
}
int port() {
return port_;
}
time_t start_time_s() {
return start_time_s_;
}
std::string master_ip() {
return master_ip_;
}
int master_port() {
return master_port_;
}
int64_t sid() {
return sid_;
}
void SetSid(int64_t sid) {
sid_ = sid;
}
const std::shared_ptr<blackwidow::BlackWidow> db() {
return db_;
}
int role() {
slash::RWLock(&state_protector_, false);
return role_;
}
int repl_state() {
slash::RWLock(&state_protector_, false);
return repl_state_;
}
std::string repl_state_str() {
slash::RWLock(&state_protector_, false);
switch (repl_state_) {
case PIKA_REPL_NO_CONNECT:
return "no connect";
case PIKA_REPL_CONNECT:
return "connect";
case PIKA_REPL_CONNECTING:
return "connecting";
case PIKA_REPL_CONNECTED:
return "connected";
case PIKA_REPL_WAIT_DBSYNC:
return "wait dbsync";
case PIKA_REPL_ERROR:
return "error";
default:
return "";
}
}
bool force_full_sync() {
return force_full_sync_;
}
void SetForceFullSync(bool v) {
force_full_sync_ = v;
}
/*
* Master use
*/
int64_t GenSid() {
// slave_mutex has been locked from exterior
int64_t sid = sid_;
sid_++;
if (sid == double_master_sid_) {
return GenSid();
} else {
return sid;
}
}
void DeleteSlave(int fd); // hb_fd
void DeleteSlave(const std::string& ip, int64_t port);
int64_t TryAddSlave(const std::string& ip, int64_t port);
bool SetSlaveSender(const std::string& ip, int64_t port,
PikaBinlogSenderThread* s);
int32_t GetSlaveListString(std::string& slave_list_str);
Status GetSmallestValidLog(uint32_t* max);
void MayUpdateSlavesMap(int64_t sid, int32_t hb_fd);
void BecomeMaster();
slash::Mutex slave_mutex_; // protect slaves_;
std::vector<SlaveItem> slaves_;
/*
* Slave use
*/
bool SetMaster(std::string& master_ip, int master_port);
bool ShouldConnectMaster();
void ConnectMasterDone();
bool ShouldStartPingMaster();
void MinusMasterConnection();
void PlusMasterConnection();
bool ShouldAccessConnAsMaster(const std::string& ip);
void SyncError();
void RemoveMaster();
bool WaitingDBSync();
void NeedWaitDBSync();
void WaitDBSyncFinish();
void KillBinlogSenderConn();
/*
* Double master use
*/
bool DoubleMasterMode() {
return double_master_mode_;
}
int64_t DoubleMasterSid() {
return double_master_sid_;
}
bool IsDoubleMaster(const std::string master_ip, int master_port);
void Start();
void Exit() {
exit_ = true;
}
void SetBinlogIoError(bool error) {
binlog_io_error_ = error;
}
bool BinlogIoError() {
return binlog_io_error_;
}
void DoTimingTask();
PikaSlavepingThread* ping_thread_;
/*
* Server init info
*/
bool ServerInit();
/*
* Blackwidow options init
*/
void RocksdbOptionInit(blackwidow::BlackwidowOptions* bw_option);
/*
* Binlog
*/
Binlog *logger_;
Status AddBinlogSender(const std::string& ip, int64_t port,
int64_t sid,
uint32_t filenum, uint64_t con_offset);
/*
* BGSave used
*/
struct BGSaveInfo {
bool bgsaving;
time_t start_time;
std::string s_start_time;
std::string path;
uint32_t filenum;
uint64_t offset;
BGSaveInfo() : bgsaving(false), filenum(0), offset(0){}
void Clear() {
bgsaving = false;
path.clear();
filenum = 0;
offset = 0;
}
};
BGSaveInfo bgsave_info() {
slash::MutexLock l(&bgsave_protector_);
return bgsave_info_;
}
bool bgsaving() {
slash::MutexLock l(&bgsave_protector_);
return bgsave_info_.bgsaving;
}
void Bgsave();
bool Bgsaveoff();
bool RunBgsaveEngine();
void FinishBgsave() {
slash::MutexLock l(&bgsave_protector_);
bgsave_info_.bgsaving = false;
}
/*
* PurgeLog used
*/
struct PurgeArg {
PikaServer *p;
uint32_t to;
bool manual;
bool force; // Ignore the delete window
};
bool PurgeLogs(uint32_t to, bool manual, bool force);
bool PurgeFiles(uint32_t to, bool manual, bool force);
bool GetPurgeWindow(uint32_t &max);
void ClearPurge() {
purging_ = false;
}
/*
* DBSync used
*/
struct DBSyncArg {
PikaServer *p;
std::string ip;
int port;
DBSyncArg(PikaServer *_p, const std::string& _ip, int &_port)
: p(_p), ip(_ip), port(_port) {}
};
void DBSyncSendFile(const std::string& ip, int port);
bool ChangeDb(const std::string& new_path);
int CountSyncSlaves() {
slash::MutexLock ldb(&db_sync_protector_);
return db_sync_slaves_.size();
}
slash::Mutex & GetSlavesMutex() { return db_sync_protector_; }
//flushall & flushdb
bool FlushAll();
bool FlushDb(const std::string& db_name);
void PurgeDir(std::string& path);
/*
*Keyscan used
*/
struct KeyScanInfo {
time_t start_time;
std::string s_start_time;
std::vector<uint64_t> key_nums_v; //the order is kv, hash, list, zset, set
bool key_scaning_;
KeyScanInfo() : start_time(0), s_start_time("1970-01-01 08:00:00"), key_nums_v({0, 0, 0, 0, 0}), key_scaning_(false) {
}
};
bool key_scaning() {
slash::MutexLock lm(&key_scan_protector_);
return key_scan_info_.key_scaning_;
}
KeyScanInfo key_scan_info() {
slash::MutexLock lm(&key_scan_protector_);
return key_scan_info_;
}
void KeyScan();
void RunKeyScan();
void StopKeyScan();
/*
* client related
*/
void ClientKillAll();
int ClientKill(const std::string &ip_port);
int64_t ClientList(std::vector<ClientInfo> *clients = nullptr);
// rwlock_
void RWLockWriter();
void RWLockReader();
void RWUnlock();
/*
* PubSub used
*/
int Publish(const std::string& channel, const std::string& msg);
void Subscribe(pink::PinkConn* conn,
const std::vector<std::string>& channels,
const bool pattern,
std::vector<std::pair<std::string, int>>* result);
int UnSubscribe(pink::PinkConn* conn,
const std::vector<std::string>& channels,
const bool pattern,
std::vector<std::pair<std::string, int>>* result);
void PubSubChannels(const std::string& pattern,
std::vector<std::string>* result);
void PubSubNumSub(const std::vector<std::string>& channels,
std::vector<std::pair<std::string, int>>* result);
int PubSubNumPat();
/*
* Monitor used
*/
void AddMonitorClient(PikaClientConn* client_ptr);
void AddMonitorMessage(const std::string &monitor_message);
bool HasMonitorClients();
/*
* Binlog Receiver use
*/
void DispatchBinlogBG(const std::string &key, PikaCmdArgsType* argv,
BinlogItem* binlog_item, uint64_t cur_serial, bool readonly);
bool WaitTillBinlogBGSerial(uint64_t my_serial);
void SignalNextBinlogBGSerial();
/*
* Slowlog use
*/
void SlowlogTrim();
void SlowlogReset();
uint32_t SlowlogLen();
void SlowlogObtain(int64_t number, std::vector<SlowlogEntry>* slowlogs);
void SlowlogPushEntry(const PikaCmdArgsType& argv, int32_t time, int64_t duration);
/*
*for statistic
*/
uint64_t ServerQueryNum();
uint64_t ServerCurrentQps();
std::unordered_map<std::string, uint64_t> ServerExecCountTable();
void ResetLastSecQuerynum(); /* Invoked in PikaDispatchThread's CronHandle */
void UpdateQueryNumAndExecCountTable(const std::string& command);
uint64_t accumulative_connections() {
return statistic_data_.accumulative_connections;
}
void incr_accumulative_connections() {
++statistic_data_.accumulative_connections;
}
void ResetStat();
slash::RecordMutex mutex_record_;
void SetDispatchQueueLimit(int queue_limit);
private:
std::atomic<bool> exit_;
std::atomic<bool> binlog_io_error_;
std::string host_;
int port_;
pthread_rwlock_t rwlock_;
std::shared_ptr<blackwidow::BlackWidow> db_;
time_t start_time_s_;
bool have_scheduled_crontask_;
struct timeval last_check_compact_time_;
int worker_num_;
PikaDispatchThread* pika_dispatch_thread_;
PikaBinlogReceiverThread* pika_binlog_receiver_thread_;
PikaHeartbeatThread* pika_heartbeat_thread_;
PikaTrysyncThread* pika_trysync_thread_;
/*
* Master use
*/
int64_t sid_;
/*
* Slave use
*/
pthread_rwlock_t state_protector_; //protect below, use for master-slave mode
std::string master_ip_;
int master_connection_;
int master_port_;
int repl_state_;
int role_;
bool force_full_sync_;
/*
* Double master use
*/
int64_t double_master_sid_;
bool double_master_mode_;
/*
* Bgsave use
*/
slash::Mutex bgsave_protector_;
pink::BGThread bgsave_thread_;
blackwidow::BackupEngine *bgsave_engine_;
BGSaveInfo bgsave_info_;
static void DoBgsave(void* arg);
bool InitBgsaveEnv();
bool InitBgsaveEngine();
void ClearBgsave() {
slash::MutexLock l(&bgsave_protector_);
bgsave_info_.Clear();
}
/*
* Purgelogs use
*/
std::atomic<bool> purging_;
pink::BGThread purge_thread_;
static void DoPurgeLogs(void* arg);
bool GetBinlogFiles(std::map<uint32_t, std::string>& binlogs);
void AutoCompactRange();
void AutoPurge();
void AutoDeleteExpiredDump();
bool CouldPurge(uint32_t index);
/*
* DBSync use
*/
slash::Mutex db_sync_protector_;
std::unordered_set<std::string> db_sync_slaves_;
void TryDBSync(const std::string& ip, int port, int32_t top);
void DBSync(const std::string& ip, int port);
static void DoDBSync(void* arg);
/*
* Flushall use
*/
static void DoPurgeDir(void* arg);
/*
* Keyscan use
*/
slash::Mutex key_scan_protector_;
pink::BGThread key_scan_thread_;
KeyScanInfo key_scan_info_;
/*
* Monitor use
*/
PikaMonitorThread* monitor_thread_;
/*
* Pubsub use
*/
pink::PubSubThread * pika_pubsub_thread_;
/*
* Binlog Receiver use
*/
bool binlogbg_exit_;
slash::Mutex binlogbg_mutex_;
slash::CondVar binlogbg_cond_;
uint64_t binlogbg_serial_;
std::vector<BinlogBGWorker*> binlogbg_workers_;
std::hash<std::string> str_hash;
/*
* Slowlog use
*/
pthread_rwlock_t slowlog_protector_;
uint64_t slowlog_entry_id_;
std::list<SlowlogEntry> slowlog_list_;
/*
* for statistic
*/
struct StatisticData {
StatisticData()
: accumulative_connections(0),
thread_querynum(0),
last_thread_querynum(0),
last_sec_thread_querynum(0),
last_time_us(0) {
}
slash::RWMutex statistic_lock;
std::atomic<uint64_t> accumulative_connections;
std::unordered_map<std::string, uint64_t> exec_count_table;
uint64_t thread_querynum;
uint64_t last_thread_querynum;
uint64_t last_sec_thread_querynum;
uint64_t last_time_us;
};
StatisticData statistic_data_;
static void DoKeyScan(void *arg);
void InitKeyScan();
PikaServer(PikaServer &ps);
void operator =(const PikaServer &ps);
};
#endif