example of using timeout in go with context package

timeout.go

package main

import (
	"context"
	"fmt"
	"time"
)

var globalResult []int

const noOfWorkers = 4
const noOfJobs = 10

func collector(ctx context.Context, results <-chan int, quitCh chan<- bool) {
	for {
		select {
		case j := <-results:
			fmt.Printf("result: %d\n", j)
			globalResult = append(globalResult, j)
			// check if we are done
			if len(globalResult) == noOfJobs {
				println("full")
				quitCh <- true
			}
		case <-ctx.Done():
			println("ctx done")
			quitCh <- true
			break
		}
	}
}

func worker(id int, job <-chan int, results chan<- int) {
	for j := range job {
		fmt.Printf("worker %d started job %d\n", id, j)
		time.Sleep(time.Second)
		fmt.Printf("worker %d finished job %d\n", id, j)
		results <- j
	}

}

func main() {

	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
	defer cancel()

	jobs := make(chan int, noOfJobs)
	results := make(chan int, noOfJobs)
	quitCh := make(chan bool, 1)

	for w := 1; w <= noOfWorkers; w++ {
		go worker(w, jobs, results)
	}
	go collector(ctx, results, quitCh)

	for a := 1; a <= noOfJobs; a++ {
		jobs <- a
	}

	<-quitCh
	//close(jobs)
	//close(results)

	fmt.Printf("globalResult: %v\n", globalResult)
}