diff options
Diffstat (limited to 'kamon-core/src/legacy-main/scala/kamon/Kamon.scala')
-rw-r--r-- | kamon-core/src/legacy-main/scala/kamon/Kamon.scala | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/kamon-core/src/legacy-main/scala/kamon/Kamon.scala b/kamon-core/src/legacy-main/scala/kamon/Kamon.scala new file mode 100644 index 00000000..c02d0505 --- /dev/null +++ b/kamon-core/src/legacy-main/scala/kamon/Kamon.scala @@ -0,0 +1,115 @@ +/* ========================================================================================= + * Copyright © 2013-2016 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 _root_.akka.actor +import _root_.akka.actor._ +import com.typesafe.config.{Config, ConfigFactory, ConfigParseOptions, ConfigResolveOptions} +import kamon.metric._ +import kamon.trace.TracerModuleImpl +import kamon.util.logger.LazyLogger + +import _root_.scala.util.control.NonFatal +import _root_.scala.util.{Failure, Success, Try} + +object Kamon { + trait Extension extends actor.Extension + + @volatile private var kamonInstance = new Instance() + + def config = kamonInstance.config + def metrics = kamonInstance.metrics + def tracer = kamonInstance.tracer + + def start(): Unit = synchronized { + kamonInstance.start() + } + + def start(conf: Config): Unit = synchronized { + kamonInstance.start(conf) + } + + def shutdown(): Unit = synchronized { + kamonInstance.shutdown() + kamonInstance = new Instance() + } + + private class Instance() { + private val log = LazyLogger(classOf[Instance]) + private var actorSystem: ActorSystem = _ + + var started = false + var config: Config = defaultConfig + val metrics = MetricsModuleImpl(config) + val tracer = TracerModuleImpl(metrics, config) + + private lazy val _start = { + log.info("Initializing Kamon...") + tryLoadAutoweaveModule() + actorSystem = ActorSystem("kamon", config) + metrics.start(actorSystem, config) + tracer.start(actorSystem, config) + actorSystem.registerExtension(ModuleLoader) + started = true + } + + def start(): Unit = { + _start + } + + def start(conf: Config): Unit = { + config = patchConfiguration(conf) + _start + } + + def shutdown(): Unit = { + if (started) { + ActorSystemTools.terminateActorSystem(actorSystem) + } + } + + private def defaultConfig = { + patchConfiguration( + ConfigFactory.load( + Thread.currentThread().getContextClassLoader(), + ConfigParseOptions.defaults(), + ConfigResolveOptions.defaults().setAllowUnresolved(true) + ) + ) + } + + private def patchConfiguration(config: Config): Config = { + val internalConfig = config.getConfig("kamon.internal-config") + config + .withoutPath("akka") + .withoutPath("spray") + .withFallback(internalConfig) + } + + private def tryLoadAutoweaveModule(): Unit = { + Try { + val autoweave = Class.forName("kamon.autoweave.Autoweave") + autoweave.getDeclaredMethod("attach").invoke(autoweave.newInstance()) + } match { + case Success(_) ⇒ + val color = (msg: String) ⇒ s"""\u001B[32m${msg}\u001B[0m""" + log.info(color("Kamon-autoweave has been successfully loaded.")) + log.info(color("The AspectJ load time weaving agent is now attached to the JVM (you don't need to use -javaagent).")) + log.info(color("This offers extra flexibility but obviously any classes loaded before attachment will not be woven.")) + case Failure(NonFatal(reason)) ⇒ log.debug(s"Kamon-autoweave failed to load. Reason: ${reason.getMessage}.") + } + } + } +} |