Timeouts

package main

import (
	"fmt"
	"time"
)

func main() {

	c1 := make(chan string, 1)
	go func() {
		time.Sleep(2 * time.Second)
		c1 <- "result 1"
	}()

	// Here's the select implementing a timeout.
	// res := <-c1 awaits the result and <-Time.After awaits a value to be sent after the timeout of 1s.
	// Since select proceeds with the first receive that’s ready,
	// we’ll take the timeout case if the operation takes more than the allowed 1s.
	select {
	case res := <-c1:
		fmt.Println(res)
	case <-time.After(1 * time.Second):
		fmt.Println("timeout 1")
	}

	c2 := make(chan string, 1)
	go func() {
		time.Sleep(2 * time.Second)
		c2 <- "result 2"
	}()
	select {
	case res := <-c2:
		fmt.Println(res)
	// If we allow a longer timeout of 3s, then the receive from c2 will succeed and we’ll print the result.
	case <-time.After(3 * time.Second):
		fmt.Println("timeout 2")
	}
}