golang-net-http-count-goroutine.go

package main

import (
	"fmt"
	"net/http"
	"runtime"
	"time"
)

func main() {
	http.HandleFunc("/", HelloServer)
	go http.ListenAndServe(":8080", nil)

	for {
		fmt.Printf("Total Goroutine yang lagi di pake : %v\n", runtime.NumGoroutine())
		time.Sleep(200 * time.Millisecond)
	}
}

// route dipanggil 1
// route diproses 1
func HelloServer(w http.ResponseWriter, r *http.Request) {
	fmt.Println("route dipanggil")
	go func() {
		// proses yang jalan selama 5 detik
		fmt.Println("goroutine didalem route dibuat")
		time.Sleep(7 * time.Second)
	}()
	fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
	// sync process yang jalan selama 3 detik
	time.Sleep(3 * time.Second)
	fmt.Println("route done")
}