(Quick Reference) # 1.1.2 RxJava Support Version: 3.2.8 ## 1.1.2 RxJava Support In addition to RxGORM, support for RxJava has been added to the Grails framework via an RxJava plugin. #### Reactive controllers with RxJava The RxJava plugin allows you to return `Observable` responses from controllers and integrates seamlessly with RxGORM to make it possible handle requests reactively, in a non-blocking manner. For example:
    def show() {
        String author = params.author
        Book.get(params.id)
                .map { Book book ->
            rx.render view:"book", model:[book:book, author:author]
        }
    }
#### Server Sent Events with RxJava It is now possible to easily issue responses that return Server Sent Events with Grails and RxJava:
    def index() {
        rx.stream { Subscriber subscriber ->
           for(i in (0..5)) {
               if(i % 2 == 0) {
                   subscriber.onNext(
                       rx.render("Tick")
                   )
               }
               else {
                   subscriber.onNext(
                       rx.render("Tock")
                   )

               }
               sleep 1000
           }
           subscriber.onCompleted()
       }
    }
| See the sample application for a demonstration of Server Sent Events in action
| Quick Reference (hide)