@Slf4j

@Component

public class ValueProcessor {

​

    @Bean

    public Function<String, String> convertToUppercase() {

        return (value) -> {

            log.info("Received {}", value);

            String upperCaseValue = value.toUpperCase();

            log.info("Sending {}", upperCaseValue);

            return upperCaseValue;

        };

    }

}