第一版时间轮任务调度实现 #1
@ -15,14 +15,12 @@ import "context"
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//
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// Date : 14:22 2022/6/23
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type ITask interface {
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// Name 任务名称标识, 全局唯一
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Name() string
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// GetFlag 任务名称标识, 全局唯一
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GetFlag() string
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// Description 任务描述
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Description() string
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// GetRunID 获取任务ID
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GetRunID() string
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// Callback 任务执行成功的回调
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Callback(result *Result) error
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// Execute 执行任务
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Execute(ctx context.Context, cfg *Config) *Result
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Execute(ctx context.Context, cfg *Config) (map[string]interface{}, error)
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}
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275
core.go
Normal file
275
core.go
Normal file
@ -0,0 +1,275 @@
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// Package task ...
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//
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// Description : task ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2023-08-04 11:13
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package task
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import (
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"container/list"
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"fmt"
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"git.zhangdeman.cn/zhangdeman/easymap"
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"git.zhangdeman.cn/zhangdeman/wrapper"
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"time"
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)
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// NewTimeWheel 实例化时间轮
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:50 2023/8/11
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func NewTimeWheel(slotCount int, interval time.Duration) *TimeWheel {
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if slotCount <= 0 {
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// 默认100个槽位
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slotCount = 100
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}
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if interval.Seconds() == 0 {
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// 默认60s扫描一次
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interval = time.Second * 60
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}
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tw := &TimeWheel{
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interval: interval,
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slots: make([]*list.List, slotCount),
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ticker: time.NewTicker(interval),
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slotCount: slotCount,
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addTaskChannel: make(chan *Task, 1000),
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removeTaskChannel: make(chan *Task, 1000),
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stopChannel: make(chan bool, 1000),
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taskRecords: easymap.NewNormal(true),
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job: nil,
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isRunning: false,
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}
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tw.initSlots()
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return tw
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}
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// TimeWheel 核心时间轮的数据结构
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 11:14 2023/8/4
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type TimeWheel struct {
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interval time.Duration // 时间轮精度
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slots []*list.List // 时间轮盘每个位置存储的任务列表
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ticker *time.Ticker // 定时器
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currentPosition int // 时间轮盘当前位置
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slotCount int // 时间轮盘的齿数,Interval*SlotCount就是时间轮盘转一圈走过的时间
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addTaskChannel chan *Task
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removeTaskChannel chan *Task
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stopChannel chan bool
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taskRecords easymap.EasyMap // Map结构来存储Task对象,key是Task.key,value是Task在双向链表中的存储对象
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// 需要执行的任务,如果时间轮盘上的Task执行同一个Job,可以直接实例化到TimeWheel结构体中。
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// 此处的优先级低于Task中的Job参数
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job ITask
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isRunning bool // 是否运行中
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}
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// initSlots 初始化时间轮盘,每个轮盘上的卡槽用一个双向队列表示,便于插入和删除
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:37 2023/8/4
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func (tw *TimeWheel) initSlots() {
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for i := 0; i < tw.slotCount; i++ {
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tw.slots[i] = list.New()
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}
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}
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// Start 启动时间轮盘的内部函数
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:38 2023/8/4
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func (tw *TimeWheel) Start() {
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tw.isRunning = true
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for {
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select {
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case <-tw.ticker.C:
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// 指定时间间隔之后, 调度一次任务
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tw.checkAndRunTask()
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case task := <-tw.addTaskChannel:
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// 此处利用Task.createTime来定位任务在时间轮盘的位置和执行圈数
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// 如果直接用任务的周期来定位位置,那么在服务重启的时候,任务周器相同的点会被定位到相同的卡槽,
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// 会造成任务过度集中
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tw.AddTask(task, false)
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case task := <-tw.removeTaskChannel:
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tw.RemoveTask(task)
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case <-tw.stopChannel:
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tw.ticker.Stop()
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tw.isRunning = false
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// TODO : 重新初始化时间轮实例
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return
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}
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}
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}
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// checkAndRunTask 检查该轮盘点位上的Task,看哪个需要执行
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:39 2023/8/4
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func (tw *TimeWheel) checkAndRunTask() {
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// 获取该轮盘位置的双向链表
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currentList := tw.slots[tw.currentPosition]
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if currentList != nil {
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for item := currentList.Front(); item != nil; {
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task := item.Value.(*Task)
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// 如果圈数>0,表示还没到执行时间,更新圈数
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if task.Circle > 0 {
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task.Circle--
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item = item.Next()
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continue
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}
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// 执行任务时,Task.job是第一优先级,然后是TimeWheel.job
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if task.Job != nil {
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go func() {
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defer func() {
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if r := recover(); nil != r {
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}
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}()
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_, _ = task.Job.Execute(nil, nil)
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}()
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} else if tw.job != nil {
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go func() {
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defer func() {
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if r := recover(); nil != r {
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}
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}()
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_, _ = tw.job.Execute(nil, nil)
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}()
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} else {
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fmt.Println(fmt.Sprintf("The task %v don't have job to run", task.Key))
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}
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// 执行完成以后,将该任务从时间轮盘删除
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next := item.Next()
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tw.taskRecords.Del(task.Key)
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currentList.Remove(item)
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item = next
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// 重新添加任务到时间轮盘,用Task.interval来获取下一次执行的轮盘位置
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// 如果times==0,说明已经完成执行周期,不需要再添加任务回时间轮盘
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if task.Times != 0 {
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if task.Times < 0 {
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tw.AddTask(task, true)
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} else {
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task.Times--
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tw.AddTask(task, true)
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}
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}
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}
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}
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// 轮盘前进一步
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if tw.currentPosition == tw.slotCount-1 {
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tw.currentPosition = 0
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} else {
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tw.currentPosition++
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}
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}
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// AddTask 添加任务的内部函数, 生成Task在时间轮盘位置和圈数的方式,true表示利用Task.interval来生成,false表示利用Task.createTime生成
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:43 2023/8/4
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func (tw *TimeWheel) AddTask(task *Task, byInterval bool) {
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// 生成 run_id
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task.RunID = wrapper.StringFromRandom(128, "").Md5().Value
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if nil != task && nil != task.Job {
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task.Key = task.Job.GetFlag() + "_" + task.RunID
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}
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var pos, circle int
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if byInterval {
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pos, circle = tw.getPosAndCircleByInterval(task.Interval)
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} else {
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pos, circle = tw.getPosAndCircleByCreatedTime(task.CreatedTime, task.Interval, task.Key)
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}
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task.Circle = circle
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task.Position = pos
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element := tw.slots[pos].PushBack(task)
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tw.taskRecords.Set(task.Key, element)
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}
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// RemoveTask 删除任务的内部函数
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:44 2023/8/4
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func (tw *TimeWheel) RemoveTask(task *Task) {
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// 从map结构中删除
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taskInfo, _ := tw.taskRecords.Get(task.Key)
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tw.taskRecords.Del(task.Key)
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// 通过TimeWheel.slots获取任务的
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currentList := tw.slots[task.Position]
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currentList.Remove(taskInfo.(*list.Element))
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}
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// getPosAndCircleByInterval 该函数通过任务的周期来计算下次执行的位置和圈数
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:46 2023/8/4
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func (tw *TimeWheel) getPosAndCircleByInterval(d time.Duration) (int, int) {
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delaySeconds := int(d.Seconds())
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intervalSeconds := int(tw.interval.Seconds())
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circle := delaySeconds / intervalSeconds / tw.slotCount
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pos := (tw.currentPosition + delaySeconds/intervalSeconds) % tw.slotCount
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// 特殊case,当计算的位置和当前位置重叠时,因为当前位置已经走过了,所以circle需要减一
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if pos == tw.currentPosition && circle != 0 {
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circle--
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}
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return pos, circle
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}
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// getPosAndCircleByCreatedTime 该函数用任务的创建时间来计算下次执行的位置和圈数
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 13:47 2023/8/4
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func (tw *TimeWheel) getPosAndCircleByCreatedTime(createdTime time.Time, d time.Duration, key interface{}) (int, int) {
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passedTime := time.Since(createdTime)
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passedSeconds := int(passedTime.Seconds())
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delaySeconds := int(d.Seconds())
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intervalSeconds := int(tw.interval.Seconds())
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circle := delaySeconds / intervalSeconds / tw.slotCount
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pos := (tw.currentPosition + (delaySeconds-(passedSeconds%delaySeconds))/intervalSeconds) % tw.slotCount
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// 特殊case,当计算的位置和当前位置重叠时,因为当前位置已经走过了,所以circle需要减一
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if pos == tw.currentPosition && circle != 0 {
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circle--
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}
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return pos, circle
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}
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// Task 任务数据结构
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 11:44 2023/8/4
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type Task struct {
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RunID string // 每一次运行的run id
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Key string // 用来标识task对象,是唯一的
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Interval time.Duration // 任务周期
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CreatedTime time.Time // 任务的创建时间
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Position int // 任务在轮盘的位置
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Circle int // 任务需要在轮盘走多少圈才能执行
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Job ITask // 任务需要执行的Job,优先级高于TimeWheel中的Job
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Times int // 任务需要执行的次数,如果需要一直执行,设置成-1
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MaxExecuteTime int64 // 最大执行时长, 超时自动取消. 如不限制时长, 设置成0
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}
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67
core_test.go
Normal file
67
core_test.go
Normal file
@ -0,0 +1,67 @@
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// Package task ...
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//
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// Description : task ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2023-08-11 17:00
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package task
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import (
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"context"
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"fmt"
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"git.zhangdeman.cn/zhangdeman/wrapper"
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"testing"
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"time"
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)
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var tw *TimeWheel
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// TestNewTimeWheel ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 17:00 2023/8/11
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func TestNewTimeWheel(t *testing.T) {
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tw = NewTimeWheel(10, 10*time.Second)
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tw.AddTask(&Task{
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Key: wrapper.StringFromRandom(32, "").Value(),
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Interval: 5 * time.Second,
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CreatedTime: time.Now(),
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Position: 0,
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Circle: 100,
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Job: &testTask{},
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Times: 10,
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MaxExecuteTime: 0,
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}, false)
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go tw.Start()
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time.Sleep(3 * time.Second)
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for tw.IsRunning {
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}
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}
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type testTask struct {
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}
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func (t testTask) GetFlag() string {
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return "unit_test"
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}
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func (t testTask) Description() string {
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return "单元测试任务"
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}
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func (t testTask) GetRunID() string {
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return wrapper.StringFromRandom(32, "").Value()
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}
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func (t testTask) Callback(result *Result) error {
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fmt.Println(result)
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return nil
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}
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func (t testTask) Execute(ctx context.Context, cfg *Config) (map[string]interface{}, error) {
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fmt.Println(wrapper.OwnTimeFromNow().ToString())
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return nil, nil
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}
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@ -19,6 +19,8 @@ type Config struct {
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ForbiddenCallback bool
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// Param 任务执行参数
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Param map[string]interface{}
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// TaskFlag 任务标识
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TaskFlag string
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// TaskName 任务名称
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TaskName string
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// Async 是否异步
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|
17
error.go
Normal file
17
error.go
Normal file
@ -0,0 +1,17 @@
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// Package task ...
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//
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// Description : 内置的错误信息
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//
|
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// Author : go_developer@163.com<白茶清欢>
|
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//
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// Date : 2023-08-04 11:50
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package task
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import "errors"
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var (
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// ErrDuplicateTaskKey 任务key重复
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ErrDuplicateTaskKey = errors.New("duplicate task key")
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// ErrTaskKeyNotFound 任务key不存在
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ErrTaskKeyNotFound = errors.New("task key doesn't existed in task list, please check your input")
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)
|
17
go.mod
17
go.mod
@ -1,3 +1,20 @@
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module git.zhangdeman.cn/zhangdeman/task
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go 1.20
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require git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20230811085725-1a7414bb7590
|
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|
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require (
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git.zhangdeman.cn/zhangdeman/consts v0.0.0-20230811030300-6f850372c88c // indirect
|
||||
git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20230811032817-e6ad534a9a10 // indirect
|
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git.zhangdeman.cn/zhangdeman/util v0.0.0-20230811070456-d6a489d5860b // indirect
|
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git.zhangdeman.cn/zhangdeman/wrapper v0.0.0-20230811071513-cfc46e8d82e1 // indirect
|
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github.com/BurntSushi/toml v1.3.2 // indirect
|
||||
github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394 // indirect
|
||||
github.com/go-ini/ini v1.67.0 // indirect
|
||||
github.com/mitchellh/go-homedir v1.1.0 // indirect
|
||||
github.com/mozillazg/go-pinyin v0.20.0 // indirect
|
||||
github.com/pkg/errors v0.9.1 // indirect
|
||||
github.com/spaolacci/murmur3 v1.1.0 // indirect
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||||
gopkg.in/yaml.v3 v3.0.1 // indirect
|
||||
)
|
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|
29
go.sum
Normal file
29
go.sum
Normal file
@ -0,0 +1,29 @@
|
||||
git.zhangdeman.cn/zhangdeman/consts v0.0.0-20230811030300-6f850372c88c h1:Dan3iSVU6XTKt8r3/qixfPHPpfLZjkYlPmaJios7wtE=
|
||||
git.zhangdeman.cn/zhangdeman/consts v0.0.0-20230811030300-6f850372c88c/go.mod h1:IXXaZkb7vGzGnGM5RRWrASAuwrVSNxuoe0DmeXx5g6k=
|
||||
git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20230307094841-e437ba87af10 h1:+Lg4vXFEiWVKjhUJdXuoP0AgjGT49oqJ3301STnZErk=
|
||||
git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20230307094841-e437ba87af10/go.mod h1:+Lc0zYF8sylRi75A7NGmObrLxugwAZa8WVpWh2eh5X0=
|
||||
git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20230811085725-1a7414bb7590 h1:zN5JKHvzCH5q+X6W6fZw1hZ18FTlmZdv+k5T2j+6/GQ=
|
||||
git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20230811085725-1a7414bb7590/go.mod h1:l9S40lsDnTd/VAZjh1kmfYvz0B9z+7oT86pMQ/KurWo=
|
||||
git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20230811032817-e6ad534a9a10 h1:orhcMAKrcOajsBJCgssnb9O8YcLsPJvWuXF511gs5dc=
|
||||
git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20230811032817-e6ad534a9a10/go.mod h1:CzX5/WwGDTnKmewarnjkK5XcSRbgszTQTdTL3OUc/s4=
|
||||
git.zhangdeman.cn/zhangdeman/util v0.0.0-20230811070456-d6a489d5860b h1:vnmxYrNdX6f5sEVjjkM1fIR+i32kHJ4g9DJqug9KKek=
|
||||
git.zhangdeman.cn/zhangdeman/util v0.0.0-20230811070456-d6a489d5860b/go.mod h1:Yum5+tgP+Wf1GWUAyQz1Qh8Ab9m5+90GYkYdzqVs0lA=
|
||||
git.zhangdeman.cn/zhangdeman/wrapper v0.0.0-20230811071513-cfc46e8d82e1 h1:k2iu9KgRxeroytB+N+/XapAxt1di7o2pNTISjFlYDJ8=
|
||||
git.zhangdeman.cn/zhangdeman/wrapper v0.0.0-20230811071513-cfc46e8d82e1/go.mod h1:kvjAbtGTo14gKCS0X4rxnb2sPkskHOUy2NXcx34t6Mw=
|
||||
github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
|
||||
github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
|
||||
github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394 h1:OYA+5W64v3OgClL+IrOD63t4i/RW7RqrAVl9LTZ9UqQ=
|
||||
github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394/go.mod h1:Q8n74mJTIgjX4RBBcHnJ05h//6/k6foqmgE45jTQtxg=
|
||||
github.com/go-ini/ini v1.67.0 h1:z6ZrTEZqSWOTyH2FlglNbNgARyHG8oLW9gMELqKr06A=
|
||||
github.com/go-ini/ini v1.67.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
|
||||
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
|
||||
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
|
||||
github.com/mozillazg/go-pinyin v0.20.0 h1:BtR3DsxpApHfKReaPO1fCqF4pThRwH9uwvXzm+GnMFQ=
|
||||
github.com/mozillazg/go-pinyin v0.20.0/go.mod h1:iR4EnMMRXkfpFVV5FMi4FNB6wGq9NV6uDWbUuPhP4Yc=
|
||||
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
|
||||
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
|
||||
github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
|
||||
github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
|
||||
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
Loading…
Reference in New Issue
Block a user