An example of concurrency best practices from http://talks.golang.org/2013/bestpractices.slide#28

server.go

package main

import (
        "fmt"
        "time"
)

type Server struct {
        quit chan bool
}

func NewServer() *Server {
        s := &Server{make(chan bool)}
        go s.run()
        return s
}

func (s *Server) run() {
        for {
                select {
                case <-s.quit:
                        fmt.Println("finishing task")
                        time.Sleep(time.Second)
                        fmt.Println("task done")
                        s.quit <- true
                        return
                case <-time.After(time.Second):
                        fmt.Println("running task")
                }
        }
}

func (s *Server) Stop() {
        fmt.Println("server stopping")
        s.quit <- true
        <-s.quit
        fmt.Println("server stopped")
}

func main() {
        s := NewServer()
        time.Sleep(2*time.Second)
        s.Stop()
}