kamon.instrumentation.lagom.CircuitBreakerMetricsProviderImpl.scala Maven / Gradle / Ivy
package kamon.instrumentation.lagom
import java.util.concurrent.CopyOnWriteArrayList
import com.lightbend.lagom.internal.spi.{CircuitBreakerMetrics, CircuitBreakerMetricsProvider}
import javax.inject.{Inject, Singleton}
import kamon.instrumentation.lagom.LagomMetrics.{CircuitBreakerInstruments, defaultTags}
import play.api.Logger
@Singleton
class CircuitBreakerMetricsProviderImpl @Inject() () extends CircuitBreakerMetricsProvider {
private val metrics = new CopyOnWriteArrayList[CircuitBreakerMetricsImpl]
override def start(breakerId: String): CircuitBreakerMetrics = {
val m = new CircuitBreakerMetricsImpl(breakerId, this)
metrics.add(m)
m
}
private[kamon] def remove(m: CircuitBreakerMetricsImpl): Unit =
metrics.remove(m)
}
object CircuitBreakerMetricsImpl {
final val Open = 1
final val HalfOpen = 2
final val Closed = 3
}
class CircuitBreakerMetricsImpl(val breakerId: String, provider: CircuitBreakerMetricsProviderImpl)
extends CircuitBreakerMetrics {
import CircuitBreakerMetricsImpl._
private val log = Logger(getClass)
private val cbInstruments = new CircuitBreakerInstruments(breakerId, defaultTags)
override def onOpen(): Unit = {
cbInstruments.state.update(Open)
log.warn(s"Circuit breaker [$breakerId] open")
}
override def onClose(): Unit = {
cbInstruments.state.update(Closed)
log.info(s"Circuit breaker [$breakerId] closed")
}
override def onHalfOpen(): Unit = {
cbInstruments.state.update(HalfOpen)
log.info(s"Circuit breaker [$breakerId] half-open")
}
override def onCallSuccess(elapsedNanos: Long): Unit = {
cbInstruments.okTimer.record(elapsedNanos)
}
override def onCallFailure(elapsedNanos: Long): Unit = {
cbInstruments.errorTimer.record(elapsedNanos)
}
override def onCallTimeoutFailure(elapsedNanos: Long): Unit = {
cbInstruments.errorTimer.record(elapsedNanos)
cbInstruments.timeoutTimer.record(elapsedNanos)
}
override def onCallBreakerOpenFailure(): Unit = {
cbInstruments.errorTimer.record(1L)
cbInstruments.openTimer.record(1L)
}
override def stop(): Unit = {
cbInstruments.remove()
provider.remove(this)
}
}