How best do I keep a long running Go program, running?

Question

I\'ve a long running server written in Go. Main fires off several goroutines where the logic of the program executes. After that main does nothing useful. Once main exits

Answer 1

Go's runtime package has a function called runtime.Goexit that will do exactly what you want.

Calling Goexit from the main goroutine terminates that goroutine without func main returning. Since func main has not returned, the program continues execution of other goroutines. If all other goroutines exit, the program crashes.

Example in the playground

package main

import (
    "fmt"
    "runtime"
    "time"
)

func main() {
    go func() {
        time.Sleep(time.Second)
        fmt.Println("Go 1")
    }()
    go func() {
        time.Sleep(time.Second * 2)
        fmt.Println("Go 2")
    }()

    runtime.Goexit()

    fmt.Println("Exit")
}