How to Build a Producer-Consumer System in Go

Use a buffered channel to decouple a producer goroutine from a consumer goroutine.

package main

import "fmt"

func main() {
    jobs := make(chan int, 5)
    results := make(chan int, 5)

    go func() {
        for j := 1; j <= 3; j++ {
            jobs <- j
        }
        close(jobs)
    }()

    go func() {
        for j := range jobs {
            results <- j * 2
        }
        close(results)
    }()

    for r := range results {
        fmt.Println(r)
    }
}

A producer-consumer system lets one part of your program create data while another part processes it without them blocking each other. Think of it like a conveyor belt in a factory where workers drop items on one end and others pick them up on the other. This pattern keeps your application efficient and prevents bottlenecks when the producer and consumer work at different speeds.