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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.
* =========================================================================================
*/
import java.util.concurrent.atomic.AtomicLong
import java.util.concurrent.{Executors, ThreadFactory}
import com.typesafe.config.{Config, ConfigUtil}
import scala.collection.concurrent.TrieMap
package object kamon {
type Tags = Map[String, String]
type JTags = java.util.Map[String, String]
/**
* Creates a thread factory that assigns the specified name to all created Threads.
*/
def threadFactory(name: String, daemon: Boolean = false): ThreadFactory =
new ThreadFactory {
val defaultFactory = Executors.defaultThreadFactory()
override def newThread(r: Runnable): Thread = {
val thread = defaultFactory.newThread(r)
thread.setName(name)
thread.setDaemon(daemon)
thread
}
}
def numberedThreadFactory(name: String, daemon: Boolean = false): ThreadFactory =
new ThreadFactory {
val count = new AtomicLong()
val defaultFactory = Executors.defaultThreadFactory()
override def newThread(r: Runnable): Thread = {
val thread = defaultFactory.newThread(r)
thread.setName(name + "-" + count.incrementAndGet().toString)
thread.setDaemon(daemon)
thread
}
}
implicit class PrettyPrintTags(val tags: Map[String, String]) extends AnyVal {
def prettyPrint(): String =
tags.map { case (k, v) => k + "=" + v } mkString("{", ",", "}")
}
/**
* Workaround to the non thread-safe [scala.collection.concurrent.TrieMap#getOrElseUpdate()] method. More details on
* why this is necessary can be found at [[https://issues.scala-lang.org/browse/SI-7943]].
*/
implicit class AtomicGetOrElseUpdateOnTrieMap[K, V](val trieMap: TrieMap[K, V]) extends AnyVal {
def atomicGetOrElseUpdate(key: K, op: ⇒ V): V =
atomicGetOrElseUpdate(key, op, { v: V ⇒ Unit })
def atomicGetOrElseUpdate(key: K, op: ⇒ V, cleanup: V ⇒ Unit): V =
trieMap.get(key) match {
case Some(v) ⇒ v
case None ⇒
val d = op
trieMap.putIfAbsent(key, d).map { oldValue ⇒
// If there was an old value then `d` was never added
// and thus need to be cleanup.
cleanup(d)
oldValue
} getOrElse (d)
}
}
implicit class UtilsOnConfig(val config: Config) extends AnyVal {
import scala.collection.JavaConverters._
def topLevelKeys: Set[String] =
config.root().entrySet().asScala.map(_.getKey).toSet
def configurations: Map[String, Config] = {
topLevelKeys
.map(entry => (entry, config.getConfig(ConfigUtil.joinPath(entry))))
.toMap
}
def pairs: Map[String, String] = {
topLevelKeys
.map(key => (key, config.getString(key)))
.toMap
}
}
}
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