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package zio.telemetry.opentelemetry.metrics
import io.opentelemetry.api
import zio._
import zio.telemetry.opentelemetry.context.ContextStorage
/**
* Provides instruments used to record measurements which are aggregated to metrics.
*
* @see
* Instrument
* Selection Guidelines
*/
trait Meter {
/**
* Constructs a Counter instrument.
*
* @param name
* the name of the Counter. Instrument names must consist of 255 or fewer characters including alphanumeric, _, .,
* -, and start with a letter
* @param unit
* instrument units must be 63 or fewer ASCII characters
* @param description
* description is an optional free-form text provided by the author of the instrument. The API MUST treat it as an
* opaque string
*/
def counter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(implicit trace: Trace): UIO[Counter[Long]]
/**
* Constructs a UpDownCounter instrument.
*
* @param name
* the name of the Counter. Instrument names must consist of 255 or fewer characters including alphanumeric, _, .,
* -, and start with a letter
* @param unit
* instrument units must be 63 or fewer ASCII characters
* @param description
* description is an optional free-form text provided by the author of the instrument. The API MUST treat it as an
* opaque string
*/
def upDownCounter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(implicit trace: Trace): UIO[UpDownCounter[Long]]
/**
* Constructs a Historgram instrument.
*
* @param name
* the name of the Counter. Instrument names must consist of 255 or fewer characters including alphanumeric, _, .,
* -, and start with a letter
* @param unit
* instrument units must be 63 or fewer ASCII characters
* @param description
* description is an optional free-form text provided by the author of the instrument. The API MUST treat it as an
* opaque string
*/
def histogram(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(implicit trace: Trace): UIO[Histogram[Double]]
/**
* Builds an Asynchronous Counter instrument with the given callback.
*
* @param name
* the name of the Counter. Instrument names must consist of 255 or fewer characters including alphanumeric, _, .,
* -, and start with a letter
* @param unit
* instrument units must be 63 or fewer ASCII characters
* @param description
* description is an optional free-form text provided by the author of the instrument. The API MUST treat it as an
* opaque string
* @param callback
* callback which observes measurements when invoked
*/
def observableCounter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(callback: ObservableMeasurement[Long] => Task[Unit])(implicit trace: Trace): RIO[Scope, Unit]
/**
* Builds an Asynchronous UpDownCounter instrument with the given callback.
*
* @param name
* the name of the Counter. Instrument names must consist of 255 or fewer characters including alphanumeric, _, .,
* -, and start with a letter
* @param unit
* instrument units must be 63 or fewer ASCII characters
* @param description
* description is an optional free-form text provided by the author of the instrument. The API MUST treat it as an
* opaque string
* @param callback
* callback which observes measurements when invoked
*/
def observableUpDownCounter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(callback: ObservableMeasurement[Long] => Task[Unit])(implicit trace: Trace): RIO[Scope, Unit]
/**
* Builds an Asynchronous Gauge instrument with the given callback.
*
* @param name
* the name of the Counter. Instrument names must consist of 255 or fewer characters including alphanumeric, _, .,
* -, and start with a letter
* @param unit
* instrument units must be 63 or fewer ASCII characters
* @param description
* description is an optional free-form text provided by the author of the instrument. The API MUST treat it as an
* opaque string
* @param callback
* callback which observes measurements when invoked
*/
def observableGauge(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(callback: ObservableMeasurement[Double] => Task[Unit])(implicit trace: Trace): RIO[Scope, Unit]
}
object Meter {
def live: URLayer[api.metrics.Meter with ContextStorage, Meter] =
ZLayer(
for {
meter <- ZIO.service[api.metrics.Meter]
ctxStorage <- ZIO.service[ContextStorage]
} yield new Meter {
private val unsafeRuntime =
Runtime.default.unsafe
override def counter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(implicit trace: Trace): UIO[Counter[Long]] =
ZIO.succeed {
val builder = meter.counterBuilder(name)
unit.foreach(builder.setUnit)
description.foreach(builder.setDescription)
Counter.long(builder.build(), ctxStorage)
}
override def upDownCounter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(implicit trace: Trace): UIO[UpDownCounter[Long]] =
ZIO.succeed {
val builder = meter.upDownCounterBuilder(name)
unit.foreach(builder.setUnit)
description.foreach(builder.setDescription)
UpDownCounter.long(builder.build(), ctxStorage)
}
override def histogram(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(implicit trace: Trace): UIO[Histogram[Double]] =
ZIO.succeed {
val builder = meter.histogramBuilder(name)
unit.foreach(builder.setUnit)
description.foreach(builder.setDescription)
Histogram.double(builder.build(), ctxStorage)
}
override def observableCounter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(callback: ObservableMeasurement[Long] => Task[Unit])(implicit trace: Trace): RIO[Scope, Unit] =
ZIO
.fromAutoCloseable(
ZIO.attempt {
val builder = meter.counterBuilder(name)
unit.foreach(builder.setUnit)
description.foreach(builder.setDescription)
builder.buildWithCallback { om =>
Unsafe.unsafe { implicit unsafe =>
unsafeRuntime.run(callback(ObservableMeasurement.long(om))).getOrThrowFiberFailure()
}
}
}
)
.unit
override def observableUpDownCounter(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(callback: ObservableMeasurement[Long] => Task[Unit])(implicit trace: Trace): RIO[Scope, Unit] =
ZIO
.fromAutoCloseable(
ZIO.attempt {
val builder = meter.upDownCounterBuilder(name)
unit.foreach(builder.setUnit)
description.foreach(builder.setDescription)
builder.buildWithCallback { om =>
Unsafe.unsafe { implicit unsafe =>
unsafeRuntime.run(callback(ObservableMeasurement.long(om))).getOrThrowFiberFailure()
}
}
}
)
.unit
override def observableGauge(
name: String,
unit: Option[String] = None,
description: Option[String] = None
)(callback: ObservableMeasurement[Double] => Task[Unit])(implicit trace: Trace): RIO[Scope, Unit] =
ZIO
.fromAutoCloseable(
ZIO.attempt {
val builder = meter.gaugeBuilder(name)
unit.foreach(builder.setUnit)
description.foreach(builder.setDescription)
builder.buildWithCallback { om =>
Unsafe.unsafe { implicit unsafe =>
unsafeRuntime.run(callback(ObservableMeasurement.double(om))).getOrThrowFiberFailure()
}
}
}
)
.unit
}
)
}
