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/* =========================================================================================
* Copyright © 2013-2017 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
* =========================================================================================
*/
package kamon
import java.time.Duration
import java.util.concurrent.{Executors, ScheduledExecutorService, ScheduledThreadPoolExecutor}
import com.typesafe.config.{Config, ConfigFactory}
import kamon.context.Codecs
import kamon.metric._
import kamon.trace._
import kamon.util.{Clock, Filters, Matcher, Registration}
import org.slf4j.LoggerFactory
import scala.concurrent.Future
import scala.util.Try
object Kamon extends MetricLookup with ClassLoading with Configuration with ReporterRegistry with Tracer with ContextPropagation with ContextStorage {
private val logger = LoggerFactory.getLogger("kamon.Kamon")
@volatile private var _config = ConfigFactory.load()
@volatile private var _environment = Environment.fromConfig(_config)
@volatile private var _filters = Filters.fromConfig(_config)
private val _clock = new Clock.Default()
private val _scheduler = Executors.newScheduledThreadPool(schedulerPoolSize(_config), numberedThreadFactory("kamon-scheduler", daemon = true))
private val _metrics = new MetricRegistry(_config, _scheduler)
private val _reporterRegistry = new ReporterRegistry.Default(_metrics, _config, _clock)
private val _tracer = Tracer.Default(Kamon, _reporterRegistry, _config, _clock)
private val _contextCodec = new Codecs(_config)
//private var _onReconfigureHooks = Seq.empty[OnReconfigureHook]
sys.addShutdownHook(() => _scheduler.shutdown())
def environment: Environment =
_environment
onReconfigure(newConfig => {
_config = config
_environment = Environment.fromConfig(config)
_filters = Filters.fromConfig(config)
_metrics.reconfigure(config)
_reporterRegistry.reconfigure(config)
_tracer.reconfigure(config)
_contextCodec.reconfigure(config)
_scheduler match {
case stpe: ScheduledThreadPoolExecutor => stpe.setCorePoolSize(schedulerPoolSize(config))
case other => logger.error("Unexpected scheduler [{}] found when reconfiguring Kamon.", other)
}
})
override def histogram(name: String, unit: MeasurementUnit, dynamicRange: Option[DynamicRange]): HistogramMetric =
_metrics.histogram(name, unit, dynamicRange)
override def counter(name: String, unit: MeasurementUnit): CounterMetric =
_metrics.counter(name, unit)
override def gauge(name: String, unit: MeasurementUnit): GaugeMetric =
_metrics.gauge(name, unit)
override def rangeSampler(name: String, unit: MeasurementUnit, sampleInterval: Option[Duration],
dynamicRange: Option[DynamicRange]): RangeSamplerMetric =
_metrics.rangeSampler(name, unit, dynamicRange, sampleInterval)
override def timer(name: String, dynamicRange: Option[DynamicRange]): TimerMetric =
_metrics.timer(name, dynamicRange)
def tracer: Tracer =
_tracer
override def buildSpan(operationName: String): Tracer.SpanBuilder =
_tracer.buildSpan(operationName)
override def identityProvider: IdentityProvider =
_tracer.identityProvider
def contextCodec(): Codecs =
_contextCodec
override def loadReportersFromConfig(): Unit =
_reporterRegistry.loadReportersFromConfig()
override def addReporter(reporter: MetricReporter): Registration =
_reporterRegistry.addReporter(reporter)
override def addReporter(reporter: MetricReporter, name: String): Registration =
_reporterRegistry.addReporter(reporter, name)
override def addReporter(reporter: MetricReporter, name: String, filter: String): Registration =
_reporterRegistry.addReporter(reporter, name, filter)
override def addReporter(reporter: SpanReporter): Registration =
_reporterRegistry.addReporter(reporter)
override def addReporter(reporter: SpanReporter, name: String): Registration =
_reporterRegistry.addReporter(reporter, name)
override def stopAllReporters(): Future[Unit] =
_reporterRegistry.stopAllReporters()
def filter(filterName: String, pattern: String): Boolean =
_filters.accept(filterName, pattern)
def filter(filterName: String): Matcher =
_filters.get(filterName)
def clock(): Clock =
_clock
def scheduler(): ScheduledExecutorService =
_scheduler
private def schedulerPoolSize(config: Config): Int =
config.getInt("kamon.scheduler-pool-size")
}
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