@ServiceActivator
	public void process(Message<?> message) {
		if (message != null) {
			long value = convertToLong(message.getPayload());
			this.gaugeRepository.recordValue(computeMetricName(message), value);
		}
	}
@author David Turanski
@author Luke Taylor
spring-xd-analytics/src/main/java/org/springframework/xd/analytics/metrics/integration/GaugeHandler.java