For the latest stable version, please use Spring Framework 6.2.0!

Sending Messages

What if you want to send messages to connected clients from any part of the application? Any application component can send messages to the brokerChannel. The easiest way to do so is to inject a SimpMessagingTemplate and use it to send messages. Typically, you would inject it by type, as the following example shows:

@Controller
public class GreetingController {

	private SimpMessagingTemplate template;

	@Autowired
	public GreetingController(SimpMessagingTemplate template) {
		this.template = template;
	}

	@RequestMapping(path="/greetings", method=POST)
	public void greet(String greeting) {
		String text = "[" + getTimestamp() + "]:" + greeting;
		this.template.convertAndSend("/topic/greetings", text);
	}

}

However, you can also qualify it by its name (brokerMessagingTemplate), if another bean of the same type exists.