restapi_snippet.java

@RestController
@EnableBinding(Processor.class)
public class RestApiEndPoint {
    public String message="hello";
    
	@ServiceActivator(inputChannel = Processor.INPUT, outputChannel = Processor.OUTPUT)
	public String log(String message) {
		this.message=message;
        System.out.println(message);
        return message;
    }
	
	@RequestMapping("/")
    public String index() {
        System.out.println(this.message);
        return this.message;
    }
}