组件分享之后端组件——一个高性能的 goroutine 池ants

go get -u github.com/panjf2000/ants/v2

package main

import (
    "fmt"
    "sync"
    "sync/atomic"
    "time"

    "github.com/panjf2000/ants/v2"
)

var sum int32

func myFunc(i interface{}) {
    n := i.(int32)
    atomic.AddInt32(&sum, n)
    fmt.Printf("run with %d\n", n)
}

func demoFunc() {
    time.Sleep(10 * time.Millisecond)
    fmt.Println("Hello World!")
}

func main() {
    defer ants.Release()

    runTimes := 1000

    // Use the common pool.
    var wg sync.WaitGroup
    syncCalculateSum := func() {
        demoFunc()
        wg.Done()
    }
    for i := 0; i < runTimes; i++ {
        wg.Add(1)
        _ = ants.Submit(syncCalculateSum)
    }
    wg.Wait()
    fmt.Printf("running goroutines: %d\n", ants.Running())
    fmt.Printf("finish all tasks.\n")

    // Use the pool with a function,
    // set 10 to the capacity of goroutine pool and 1 second for expired duration.
    p, _ := ants.NewPoolWithFunc(10, func(i interface{}) {
        myFunc(i)
        wg.Done()
    })
    defer p.Release()
    // Submit tasks one by one.
    for i := 0; i < runTimes; i++ {
        wg.Add(1)
        _ = p.Invoke(int32(i))
    }
    wg.Wait()
    fmt.Printf("running goroutines: %d\n", p.Running())
    fmt.Printf("finish all tasks, result is %d\n", sum)
}