@InterfaceStability.Evolving
public interface MetricsContext

MetricsContext encapsulates additional contextLabels about metrics exposed via a MetricsReporter

The contextLabels() map provides following information:

in all components

a _namespace field indicating the component exposing metrics e.g. kafka.server, kafka.consumer. The JmxReporter uses this as prefix for MBean names

for clients and streams libraries

any freeform fields passed in via client properties in the form of metrics.context.<key>=<value>

for kafka brokers

kafka.broker.id, kafka.cluster.id

for connect workers

connect.kafka.cluster.id, connect.group.id