diff options
Diffstat (limited to 'kamon-core/src/legacy-main/scala/kamon/trace/TraceLocal.scala')
-rw-r--r-- | kamon-core/src/legacy-main/scala/kamon/trace/TraceLocal.scala | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/kamon-core/src/legacy-main/scala/kamon/trace/TraceLocal.scala b/kamon-core/src/legacy-main/scala/kamon/trace/TraceLocal.scala new file mode 100644 index 00000000..460e4b22 --- /dev/null +++ b/kamon-core/src/legacy-main/scala/kamon/trace/TraceLocal.scala @@ -0,0 +1,64 @@ +/* + * ========================================================================================= + * Copyright © 2013-2014 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.trace + +import kamon.trace.TraceLocal.TraceLocalKey +import kamon.util.Supplier +import scala.collection.concurrent.TrieMap + +object TraceLocal { + + trait TraceLocalKey[T] + + trait AvailableToMdc extends TraceLocalKey[String] { + def mdcKey: String + } + + object AvailableToMdc { + case class DefaultKeyAvailableToMdc(mdcKey: String) extends AvailableToMdc + + def fromKey(mdcKey: String): AvailableToMdc = DefaultKeyAvailableToMdc(mdcKey) + def apply(mdcKey: String): AvailableToMdc = fromKey(mdcKey) + } + + def store[T](key: TraceLocalKey[T])(value: Any): Unit = Tracer.currentContext match { + case ctx: MetricsOnlyContext ⇒ ctx.traceLocalStorage.store(key)(value) + case EmptyTraceContext ⇒ // Can't store in the empty context. + } + + def retrieve[T](key: TraceLocalKey[T]): Option[T] = Tracer.currentContext match { + case ctx: MetricsOnlyContext ⇒ ctx.traceLocalStorage.retrieve(key) + case EmptyTraceContext ⇒ None // Can't retrieve anything from the empty context. + } + + // Java variant + @throws(classOf[NoSuchElementException]) + def get[T](key: TraceLocalKey[T]): T = retrieve(key).get + + def getOrElse[T](key: TraceLocalKey[T], code: Supplier[T]): T = retrieve(key).getOrElse(code.get) + + def storeForMdc(key: String, value: String): Unit = store(AvailableToMdc.fromKey(key))(value) + + def newTraceLocalKey[T]: TraceLocalKey[T] = new TraceLocalKey[T] {} +} + +class TraceLocalStorage { + val underlyingStorage = TrieMap[TraceLocalKey[_], Any]() + + def store[T](key: TraceLocalKey[T])(value: Any): Unit = underlyingStorage.put(key, value) + def retrieve[T](key: TraceLocalKey[T]): Option[T] = underlyingStorage.get(key).map(_.asInstanceOf[T]) +} |