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package kamon.context
trait Storage {
def current(): Context
def store(context: Context): Storage.Scope
}
object Storage {
trait Scope {
def context: Context
def close(): Unit
}
class ThreadLocal extends Storage {
private val tls = new java.lang.ThreadLocal[Context]() {
override def initialValue(): Context = Context.Empty
}
override def current(): Context =
tls.get()
override def store(context: Context): Scope = {
val newContext = context
val previousContext = tls.get()
tls.set(newContext)
new Scope {
override def context: Context = newContext
override def close(): Unit = tls.set(previousContext)
}
}
}
object ThreadLocal {
def apply(): ThreadLocal = new ThreadLocal()
}
}
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