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package kamon
import java.util.UUID
import akka.actor.ActorPath
case class TraceContext(id: UUID, entries: List[TraceEntry]) {
def fork = this.copy(entries = Nil)
def withEntry(entry: TraceEntry) = this.copy(entries = entry :: entries)
}
object TraceContext {
val current = new ThreadLocal[TraceContext]
}
trait TraceEntry
case class MessageExecutionTime(actorPath: ActorPath, initiated: Long, ended: Long)
case class CodeBlockExecutionTime(blockName: String, begin: Long, end: Long) extends TraceEntry
trait TraceSupport {
import TraceContext.current
def trace[T](blockName: String)(f: => T): T = {
val before = System.currentTimeMillis
val result = f
val after = System.currentTimeMillis
swapContext(current.get().withEntry(CodeBlockExecutionTime(blockName, before, after)))
result
}
def swapContext(newContext: TraceContext) {
current.set(newContext)
}
}
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