A Non-blocking “Email sending” functionality in Scala

In our last blog “Adding an Email Sending Functionality in Play using Scala” we explained how to include an Email sending functionality in a Play Scala Application. But the way in which we implemented it, made it a Blocking one i.e., application will wait until email has been sent.

In this blog we will explain, how to make the Email Sending functionality a Non-blocking one. By making it non-blocking, the application will not wait until email is sent & will move on to the next step.

To make this functionality a Non-Blocking one, just make following changes in the mailSendingApp we posted earlier:-

1) Import following packages in Application.scala file

import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits._

2) Add following code to Application.scala file

def sendMail: Action[play.api.mvc.AnyContent] = Action { implicit request =>
mailForm.bindFromRequest.fold (
formWithErrors => {
Redirect("/")
},
mailData => {
Future {sendEmail(mailData.email)}
Redirect("/")
})
}

def sendEmail(email: String): Unit = {
val mail = use[MailerPlugin].email
mail.setSubject("Email sent using Scala")
mail.addRecipient(email)
mail.addFrom(email)
mail.send("Hello World")
}

Note – To download the App with changes just click here.