@Component

public class MyCustomObservation {

​

   private final ObservationRegistry observationRegistry;

​

   public MyCustomObservation(ObservationRegistry observationRegistry) {

      this.observationRegistry = observationRegistry;

   }

​

   public void doSomething() {

      Observation.createNotStarted("doSomething", this.observationRegistry)

                 .lowCardinalityKeyValue("locale", "en-US")

                 .highCardinalityKeyValue("userId", "42")

                 .observe(() -> {

                       // Execute business logic here

                 });

   }

}