gistfile1.go

package main

import (
	"fmt"
	"math/rand"
	"time"
)

func main() {

	/* initialization and assignment of channels */
	c := make(chan []string)
	p := make(chan []string)
	/* testing multiple channels */
	//p2 := make(chan []string)

	/* Pass created channels to Goroutines */
	go Feeder1(p)
	go Feeder2(p) //switch to P2 to test multiple channels
	go Consumer(c)

	for {
		select {
		case produced := <-p:
			c <- produced
		//case of P2 to test multiple channels
		/*case produced2 := <-p2:
		c <- produced2*/
		//time out case to stop the loop when communication is too slow
		/*case <-time.After(6 * time.Second):
		  return*/
		default:
			fmt.Printf("\n --- We timed out! --- \n")
			time.Sleep(1 * time.Second)
		}
	}
}

func Feeder2(w chan []string) {

	headlines := []string{
		"BBC: Speedboat victim 'doted on family'\n",
		"BBC: Syria rebel sarin claim downplayed\n",
		"BBC: German 'ex-Auschwitz guard' arrested\n",
		"BBC: Armless artist 'denied entry' to UK\n",
		"BBC: Bangladesh protest clashes kill 27\n",
		"BBC: Ex-Italian PM Giulio Andreotti dies\n"}

	for i := 0; ; i++ {
		selection := []string{}
		for s := 0; s <= 2; s++ {
			selection = append(selection, headlines[randInt(0, len(headlines))])
		}
		w <- selection
		time.Sleep(2 * time.Second)
	}
}

func Feeder1(w chan []string) {

	headlines := []string{
		"SKY: Deadly Virus Can 'Spread Between People'\n",
		"SKY: Ariel Castro's Brothers Brand Him 'A Monster'\n",
		"SKY: Astronaut Ends Space Mission With Bowie Song\n",
		"SKY: Chinese Artist Films Violent Street Brawl\n",
		"SKY: May Washout: Fortnight's Rainfall In One Day\n",
		"SKY: Mother's Day Shooting: CCTV Shows Suspect\n"}

	for i := 0; ; i++ {
		selection := []string{}
		for q := 0; q <= 2; q++ {
			selection = append(selection, headlines[randInt(0, len(headlines))])
		}
		w <- selection
		//randomTimeValue := randInt(5, 6)
		time.Sleep(2 * time.Second)
	}
}

func Consumer(n chan []string) {

	for {
		v := <-n
		for _, x := range v {
			fmt.Printf("Headline:\t%s", x)
		}
	}
}

func randInt(min int, max int) int {
	return min + rand.Intn(max-min)
}