How Can I Keep a Long-Running Go Program from Terminating Prematurely?

Best Practices for Keeping a Long-Running Go Program Alive

Running a long-running Go program without it prematurely terminating can be crucial for certain applications. When the main function exits, so does the program, leaving any running goroutines stranded. How do you ensure your program stays alive when it's supposed to?

One common tactic to prevent the main goroutine from exiting is using a simple call to fmt.Scanln(). However, this option is problematic if you don't intend any console interaction.

Instead, consider the following recommendations:

1. Block Forever:
   Block the main goroutine using select {} for indefinite waiting. This approach ensures that the program stays alive as long as the select statement is not interrupted.

   package main
   
   import (
       "fmt"
       "time"
   )
   
   func main() {
       go forever()
       select {} // block forever
   }
   
   func forever() {
       for {
           fmt.Printf("%v+\n", time.Now())
           time.Sleep(time.Second)
       }
   }

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