diff options
Diffstat (limited to 'kamon-core/src/main/scala/kamon/util/TriemapAtomicGetOrElseUpdate.scala')
-rw-r--r-- | kamon-core/src/main/scala/kamon/util/TriemapAtomicGetOrElseUpdate.scala | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kamon-core/src/main/scala/kamon/util/TriemapAtomicGetOrElseUpdate.scala b/kamon-core/src/main/scala/kamon/util/TriemapAtomicGetOrElseUpdate.scala new file mode 100644 index 00000000..cd457cdc --- /dev/null +++ b/kamon-core/src/main/scala/kamon/util/TriemapAtomicGetOrElseUpdate.scala @@ -0,0 +1,18 @@ +package kamon.util + +import scala.collection.concurrent.TrieMap + +object TriemapAtomicGetOrElseUpdate { + + /** + * 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 Syntax[K, V](val trieMap: TrieMap[K, V]) extends AnyVal { + def atomicGetOrElseUpdate(key: K, op: ⇒ V): V = + trieMap.get(key) match { + case Some(v) ⇒ v + case None ⇒ val d = op; trieMap.putIfAbsent(key, d).getOrElse(d) + } + } +} |