Sorted:

The Anatomy of a PromQL Query

Prometheus Counter Metrics

Kafka Docker Compose – Fast Bootup Script

Spring Boot app metrics – with Prometheus and Micrometer

Mockito ArgumentCaptor

Mockito – Using Spies

Spring Boot JPA Testing

MapStruct: a Java Bean mapper

Monitoring Spring Boot with Prometheus and Grafana

Configure Kafka Producer and Consumer in Spring Boot x2