golang timer task

// tickExpired 执行7秒后结束
func tickExpired() {
	ticker := time.NewTicker(1 * time.Second)
	expired := time.After(7 * time.Second)
	defer ticker.Stop()
	ticks := 0
	for {
		select {
		case <-ticker.C:
			ticks++
			fmt.Println("tick定时器: ", ticks)
		case <-expired:
			fmt.Println("expired!")
			return
		}
	}
}

// tickTimes 执行6次结束
func tickTimes() {
	ticker := time.NewTicker(1 * time.Second)
	defer ticker.Stop()
	ticks := 0
	for {
		select {
		case <-ticker.C:
			fmt.Println("tick定时器: ", ticks)
			if ticks == 6 {
				return
			}
			ticks++
		}
	}
}

func StartMonthlyTimer(f func()) {
	go func() {
		for {
			f()
			now := time.Now()
			// 计算下个月零点
			year := now.Year()
			month := now.Month()
			if month == time.December {
				year += 1
				month = time.January
			} else {
				month = time.Month(int(month) + 1)
			}
			next := time.Date(year, month, 1, 0, 0, 0, 0, time.Now().Location())
			t := time.NewTimer(next.Sub(now))
			<-t.C
		}
	}()
}

func StartMinuteTimer(intMin uint, f func(interface{}), i interface{}) {
	go func() {
		for {
			f(i)
			now := time.Now()
			next := now.Add(time.Duration(intMin) * time.Minute)
			next = time.Date(next.Year(), next.Month(), next.Day(), next.Hour(), next.Minute(), 0, 0, next.Location())
			t := time.NewTimer(next.Sub(now))
			<-t.C
		}
	}()

package main

import (
    "github.com/robfig/cron"
    "log"
)

func main() {
    i := 0
    c := cron.New()
    spec := "*/5 * * * * ?"
    c.AddFunc(spec, func() {
        i++
        log.Println("cron running:", i)
    })
    c.Start()
    
    select{}
}

package main

import (
    "github.com/robfig/cron"
    "log"
    "fmt"
)

type TestJob struct {
}

func (this TestJob)Run() {
    fmt.Println("testJob1...")
}

type Test2Job struct {
}

func (this Test2Job)Run() {
    fmt.Println("testJob2...")
}

//启动多个任务
func main() {
    i := 0
    c := cron.New()
    
    // AddFunc
    spec := "*/5 * * * * ?"
    c.AddFunc(spec, func() {
        i++
        log.Println("cron running:", i)
    })
    
    // AddJob方法
    c.AddJob(spec, TestJob{})
    c.AddJob(spec, Test2Job{})
    
    // 启动计划任务
    c.Start()
    
    // 关闭着计划任务, 但是不能关闭已经在执行中的任务.
    defer c.Stop()
    
    select{}
}