Reactive changes for samples

- Relates #750

spring-statemachine-samples/scope/src/main/java/demo/scope/StateMachineController.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@ package demo.scope;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.messaging.support.MessageBuilder;
 import org.springframework.statemachine.StateMachine;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
@@ -25,6 +26,7 @@ import org.springframework.web.bind.annotation.RequestParam;
 
 import demo.scope.StateMachineConfig.Events;
 import demo.scope.StateMachineConfig.States;
+import reactor.core.publisher.Mono;
 
 @Controller
 public class StateMachineController {
@@ -44,7 +46,10 @@ public class StateMachineController {
 	@RequestMapping("/states")
 	public String getStates(@RequestParam(value = "event", required = false) Events event, Model model) {
 		if (event != null) {
-			stateMachine.sendEvent(event);
+			stateMachine
+				.sendEvent(Mono.just(MessageBuilder
+					.withPayload(event).build()))
+				.blockLast();
 		}
 		model.addAttribute("states", stateMachine.getState().getIds());
 		model.addAttribute("stateChartModel", stateChartModel);