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dau_manager.go
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dau_manager.go
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// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
package stats
import (
"encoding/json"
"github.com/TeaOSLab/EdgeNode/internal/events"
"github.com/TeaOSLab/EdgeNode/internal/goman"
"github.com/TeaOSLab/EdgeNode/internal/remotelogs"
"github.com/TeaOSLab/EdgeNode/internal/trackers"
"github.com/TeaOSLab/EdgeNode/internal/utils/fasttime"
"github.com/TeaOSLab/EdgeNode/internal/utils/idles"
"github.com/TeaOSLab/EdgeNode/internal/utils/kvstore"
"github.com/iwind/TeaGo/Tea"
"github.com/iwind/TeaGo/types"
timeutil "github.com/iwind/TeaGo/utils/time"
"os"
"runtime"
"strings"
"sync"
"testing"
"time"
)
var SharedDAUManager = NewDAUManager()
type IPInfo struct {
IP string
ServerId int64
}
type DAUManager struct {
isReady bool
cacheFile string
ipChan chan IPInfo
ipTable *kvstore.Table[[]byte] // server_DATE_serverId_ip => nil
statMap map[string]int64 // server_DATE_serverId => count
statLocker sync.RWMutex
cleanTicker *time.Ticker
}
// NewDAUManager DAU计算器
func NewDAUManager() *DAUManager {
return &DAUManager{
cacheFile: Tea.Root + "/data/stat_dau.cache",
statMap: map[string]int64{},
cleanTicker: time.NewTicker(24 * time.Hour),
ipChan: make(chan IPInfo, 8192),
}
}
func (this *DAUManager) Init() error {
// recover from cache
_ = this.recover()
// create table
store, storeErr := kvstore.DefaultStore()
if storeErr != nil {
return storeErr
}
db, dbErr := store.NewDB("dau")
if dbErr != nil {
return dbErr
}
{
table, err := kvstore.NewTable[[]byte]("ip", kvstore.NewNilValueEncoder())
if err != nil {
return err
}
db.AddTable(table)
this.ipTable = table
}
{
table, err := kvstore.NewTable[uint64]("stats", kvstore.NewIntValueEncoder[uint64]())
if err != nil {
return err
}
db.AddTable(table)
}
// clean expires items
goman.New(func() {
idles.RunTicker(this.cleanTicker, func() {
err := this.CleanStats()
if err != nil {
remotelogs.Error("DAU_MANAGER", "clean stats failed: "+err.Error())
}
})
})
// dump ip to kvstore
goman.New(func() {
// cache latest IPs to reduce kv queries
var cachedIPs []IPInfo
var maxIPs = runtime.NumCPU() * 8
if maxIPs <= 0 {
maxIPs = 8
} else if maxIPs > 64 {
maxIPs = 64
}
var day = fasttime.Now().Ymd()
Loop:
for ipInfo := range this.ipChan {
// check day
if fasttime.Now().Ymd() != day {
day = fasttime.Now().Ymd()
cachedIPs = []IPInfo{}
}
// lookup cache
for _, cachedIP := range cachedIPs {
if cachedIP.IP == ipInfo.IP && cachedIP.ServerId == ipInfo.ServerId {
continue Loop
}
}
// add to cache
cachedIPs = append(cachedIPs, ipInfo)
if len(cachedIPs) > maxIPs {
cachedIPs = cachedIPs[1:]
}
_ = this.processIP(ipInfo.ServerId, ipInfo.IP)
}
})
// dump to cache when close
events.OnClose(func() {
_ = this.Close()
})
this.isReady = true
return nil
}
func (this *DAUManager) AddIP(serverId int64, ip string) {
select {
case this.ipChan <- IPInfo{
IP: ip,
ServerId: serverId,
}:
default:
}
}
func (this *DAUManager) processIP(serverId int64, ip string) error {
if !this.isReady {
return nil
}
// day
var date = fasttime.Now().Ymd()
{
var key = "server_" + date + "_" + types.String(serverId) + "_" + ip
found, err := this.ipTable.Exist(key)
if err != nil || found {
return err
}
err = this.ipTable.Set(key, nil)
if err != nil {
return err
}
}
{
var key = "server_" + date + "_" + types.String(serverId)
this.statLocker.Lock()
this.statMap[key] = this.statMap[key] + 1
this.statLocker.Unlock()
}
return nil
}
func (this *DAUManager) ReadStatMap() map[string]int64 {
this.statLocker.Lock()
var statMap = this.statMap
this.statMap = map[string]int64{}
this.statLocker.Unlock()
return statMap
}
func (this *DAUManager) Flush() error {
return this.ipTable.DB().Store().Flush()
}
func (this *DAUManager) TestInspect(t *testing.T) {
err := this.ipTable.DB().Inspect(func(key []byte, value []byte) {
t.Log(string(key), "=>", string(value))
})
if err != nil {
t.Fatal(err)
}
}
func (this *DAUManager) Close() error {
this.cleanTicker.Stop()
this.statLocker.Lock()
var statMap = this.statMap
this.statMap = map[string]int64{}
this.statLocker.Unlock()
if len(statMap) == 0 {
return nil
}
statJSON, err := json.Marshal(statMap)
if err != nil {
return err
}
return os.WriteFile(this.cacheFile, statJSON, 0666)
}
func (this *DAUManager) CleanStats() error {
if !this.isReady {
return nil
}
var tr = trackers.Begin("STAT:DAU_CLEAN_STATS")
defer tr.End()
// day
{
var date = timeutil.Format("Ymd", time.Now().AddDate(0, 0, -2))
err := this.ipTable.DeleteRange("server_", "server_"+date)
if err != nil {
return err
}
}
return nil
}
func (this *DAUManager) Truncate() error {
return this.ipTable.Truncate()
}
func (this *DAUManager) recover() error {
data, err := os.ReadFile(this.cacheFile)
if err != nil || len(data) == 0 {
return err
}
_ = os.Remove(this.cacheFile)
var statMap = map[string]int64{}
err = json.Unmarshal(data, &statMap)
if err != nil {
return err
}
var today = timeutil.Format("Ymd")
for key := range statMap {
var pieces = strings.Split(key, "_")
if pieces[1] != today {
delete(statMap, key)
}
}
this.statMap = statMap
return nil
}