<9> go worker線程池

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

Worker Pools

package mainimport "fmt"import "time"// 使用goroutine  開啟大小為3的線程池// 其中1個channel為執行做通訊，1個對結果進行儲存// 建立的workerfunc worker(id int, jobs <-chan int, results chan<- int) {    for j := range jobs {        fmt.Println("worker", id, "processing job", j)        time.Sleep(time.Second)        results <- j * 2    }}func main() {    // 建立channel    jobs := make(chan int, 100)    results := make(chan int, 100)    // 3個worker作為一個pool    for w := 1; w <= 3; w++ {        go worker(w, jobs, results)    }    // 發送9個jobs，然後關閉    for j := 1; j <= 9; j++ {        jobs <- j    }    close(jobs)    // 最後收集結果    for a := 1; a <= 9; a++ {        <-results    }}

輸出：
worker 1 processing job 1
worker 2 processing job 2
worker 3 processing job 3
worker 1 processing job 4
worker 2 processing job 5
worker 3 processing job 6
worker 1 processing job 7
worker 2 processing job 8
worker 3 processing job 9
real 0m3.149s