Provides a wrapper for by-name expressions with the intent that they can become eligible for implicit conversions and implicit resolution.
The mixin trait for creating a class which creates health checks.
A Scala facade class for DropwizardCounter.
Provides timing of future executions.
A Scala facade class for DropwizardGauge.
An alternative metric builder that creates Histograms and Timers with Reservoirs from the HdrHistogram library.
An alternative metric builder that creates Histograms and Timers with Reservoirs from the HdrHistogram library.
See the the manual for more instructions on using hdrhistogram.
Magnet for the checker.
Magnet for the checker. See http://spray.io/blog/2012-12-13-the-magnet-pattern/.
A Scala facade class for DropwizardHistogram.
The mixin trait for creating a class which is instrumented with metrics.
The mixin trait for creating a class which is instrumented with metrics.
Use it as follows:
object Application { // The application wide metrics registry. val metricRegistry = new com.codahale.metrics.MetricRegistry() } trait Instrumented extends InstrumentedBuilder { val metricRegistry = Application.metricRegistry } class Example(db: Database) extends Instrumented { private[this] val loading = metrics.timer("loading") def loadStuff(): Seq[Row] = loading.time { db.fetchRows() } }
It is also possible to override the metric base name. For example:
class Example(db: Database) extends Instrumented { override lazy val metricBaseName = MetricName("Overridden.Base.Name") private[this] val loading = metrics.timer("loading") def loadStuff(): Seq[Row] = loading.time { db.fetchRows() } }
If you want to use hdrhistograms, you can override the metric builder as follows:
trait Instrumented extends InstrumentedBuilder { override lazy protected val metricBuilder = new HdrMetricBuilder(metricBaseName, metricRegistry, false) val metricRegistry = Application.metricRegistry }
See the the manual for more instructions on using hdrhistogram.
A Scala facade class for DropwizardMeter.
A Scala facade class for DropwizardMeter.
Example usage:
class Example(val db: Db) extends Instrumented { private[this] val rowsLoadedMeter = metrics.meter("rowsLoaded") def load(id: Long): Seq[Row] = { val rows = db.load(id) rowsLoaded.mark(rows.size) rows } }
Builds and registering metrics.
The (base)name of a metric.
The (base)name of a metric.
Constructed via the companion object, e.g. MetricName(getClass, "requests")
.
A Scala facade class for DropwizardTimer.
A Scala facade class for DropwizardTimer.
Example usage:
class Example(val db: Db) extends Instrumented { private[this] val loadTimer = metrics.timer("load") def load(id: Long) = loadTimer.time { db.load(id) } }
Provides a wrapper for by-name expressions with the intent that they can become eligible for implicit conversions and implicit resolution.
Result type of the evaluated
expression