fix: removing event latency measurement for internal events (#116)

Author: AlexZangerle

src/main/kotlin/at/ac/uibk/dps/cirrina/execution/object/StateMachine.kt

@@ -136,7 +136,7 @@ internal constructor(
   private fun processEvent(event: Event) {
     if (isTerminated()) return
 
-    eventTimer.update((System.nanoTime() - event.emittedTime) / 1_000, TimeUnit.MICROSECONDS)
+    recordLatency(event)
 
     handleEvent(event)?.let { transition -> step(transition) }
 
@@ -258,6 +258,14 @@ internal constructor(
 
   private fun stopTimeout(name: String) = timeoutActionManager.stop(name)
 
+  private fun recordLatency(event: Event) {
+    if (event.source == name) return
+    if (event.target != name) return
+    if (event.emittedTime == 0L) return
+
+    eventTimer.update((System.nanoTime() - event.emittedTime) / 1_000, TimeUnit.MICROSECONDS)
+  }
+
   override fun toString() = "StateMachine(name='$name')"
 
   inner class StateMachineEventHandler(val eventHandler: EventHandler) {