BeerNamesController.java

@RestController
@Slf4j
class BeerNamesController {
	@Output(Source.OUTPUT)
	@Autowired
	private MessageChannel messageChannel;

	
	@Autowired
	RestTemplate restTemplate;
	
	@PostMapping("/beer-me-up")
	public void write(@RequestBody BeerDTO beer){
		log.info("Beer is {}", beer);
		this.messageChannel.send(MessageBuilder.withPayload(beer.getName()).build());
	}