add example for #1601

_examples/http-server/README.md

@@ -11,7 +11,7 @@ we use the `iris.Addr` which is an `iris.Runner` type
 
 ```go
 // Listening on tcp with network address 0.0.0.0:8080
-// app.Listen(":8080") it's a shortcut of:
+// app.Listen(":8080") is just a shortcut of:
 app.Run(iris.Addr(":8080"))
 ```
 

_examples/http-server/graceful-shutdown/custom-notifier/main.go

@@ -17,6 +17,7 @@ func main() {
 		ctx.HTML("<h1>hi, I just exist in order to see if the server is closed</h1>")
 	})
 
+	idleConnsClosed := make(chan struct{})
 	go func() {
 		ch := make(chan os.Signal, 1)
 		signal.Notify(ch,
@@ -37,10 +38,12 @@ func main() {
 			ctx, cancel := stdContext.WithTimeout(stdContext.Background(), timeout)
 			defer cancel()
 			app.Shutdown(ctx)
+			close(idleConnsClosed)
 		}
 	}()
 
 	// Start the server and disable the default interrupt handler in order to
 	// handle it clear and simple by our own, without any issues.
 	app.Listen(":8080", iris.WithoutInterruptHandler)
+	<-idleConnsClosed
 }

_examples/http-server/graceful-shutdown/default-notifier/main.go

@@ -17,12 +17,14 @@ import (
 func main() {
 	app := iris.New()
 
+	idleConnsClosed := make(chan struct{})
 	iris.RegisterOnInterrupt(func() {
 		timeout := 10 * time.Second
 		ctx, cancel := stdContext.WithTimeout(stdContext.Background(), timeout)
 		defer cancel()
 		// close all hosts
 		app.Shutdown(ctx)
+		close(idleConnsClosed)
 	})
 
 	app.Get("/", func(ctx iris.Context) {
@@ -30,5 +32,6 @@ func main() {
 	})
 
 	// http://localhost:8080
-	app.Listen(":8080", iris.WithoutInterruptHandler)
+	app.Listen(":8080", iris.WithoutInterruptHandler, iris.WithoutServerError(iris.ErrServerClosed))
+	<-idleConnsClosed
 }