sealed traitSparkMetric extends Metric with Serializable
SparkMetric instances implement APIs that look like their Codahale counterparts, but do not store any state. Instead,
they just send the data points to the driver, where they are aggregated and published.
SparkMetric instances implement APIs that look like their Codahale counterparts, but do not store any state. Instead, they just send the data points to the driver, where they are aggregated and published.