Miscellaneous.md

Miscellaneous

Write MetricFilter as regular Scala function (Scala 2.11.4 and before)

Since 2.11.5 Scala support SAM (Single Abstract Method) and these implicit conversions are not automatic. In case you are still on an older version:

You can write a com.codahale.metrics.MetricFilter as a regular Scala functions. Start with

import nl.grons.metrics4.scala.Implicits._

Then wherever you need a MetricFilter you can write a function of type (String, Metric) => Boolean. E.g.:

YourApplication.metricRegistry.getCounters((name: String, _: Metric) => name.startsWith("foo"))

or a tad more explicit:

YourApplication.metricRegistry.getCounters(functionToMetricFilter((name, _) => name.startsWith("foo")))

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