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GracefulShutdown.go
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GracefulShutdown.go
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package main
import (
"context"
"fmt"
"os"
"os/signal"
"sync"
"syscall"
"time"
)
func foo(ctx context.Context, wg *sync.WaitGroup) {
count := 0
for {
count++
fmt.Println("Inside foo:", count)
select {
case <-ctx.Done():
fmt.Println("ABORTED......")
wg.Done()
return
}
}
}
func bar(ctx context.Context, wg *sync.WaitGroup) {
time.Sleep(10)
fmt.Println("Inside bar")
// select {
// case <-ctx.Done():
// fmt.Println("bar routine cancelled..")
// case <-wg.Done():
// fmt.Println("bar executed till end")
// return
// }
wg.Done()
return
}
func main() {
var wg sync.WaitGroup
//Gracefully termination of both the goroutines.
Done := make(chan os.Signal, 1)
signal.Notify(Done, syscall.SIGTERM, syscall.SIGINT)
ctx, cancel := context.WithCancel(context.Background())
wg.Add(2)
go foo(ctx, &wg)
go bar(ctx, &wg)
select {
// Shutdown. Cancel application context will kill all attached tasks.
case <-Done:
cancel()
fmt.Println("Client received exit cmd..Shutting down all goroutines.")
}
wg.Wait()
fmt.Println("FInsihed")
}