MetricTypes
id	MetricTypeID
1	SITE
2	SITE.FRUITS_READER
3	SITE.FRUITS_READER.EVENT
4	SITE.FRUITS_READER.EVENT.ALARM


Metric class
id	type			code					MetricTypeID								parent_metric_class_id
1	SITE			1						1											null
2	FRUITS_READER	5						2											1
3	EVENT			FRUITS					3											2
4	ALARM			FRUITS_READER alarm		4											3


METRIC_INT
id	metricTypeId	metricTypeId												parent_metric_class_id	value
1	status			SITE.FRUITS_READER.FRUITS.FRUITS_READER.status				4						true