io.quarkus.micrometer.runtime.binder.kafka

Class KafkaEventObserver

java.lang.Object

io.quarkus.micrometer.runtime.binder.kafka.KafkaEventObserver

@ApplicationScoped
public class KafkaEventObserver
extends Object

Observer to create and register KafkaClientMetrics. This observer uses only classes from "kafka-clients" and none from "kafka-streams". Must be separated from KafkaStreamsEventObserver, because they use different dependencies and if only kafka-client is used, the classes from kafka-streams aren't loaded.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) Map<Object,io.micrometer.core.instrument.binder.kafka.KafkaClientMetrics>	clientMetrics
(package private) io.micrometer.core.instrument.MeterRegistry	registry

Constructor Summary

Constructors

Constructor and Description
KafkaEventObserver()

Method Summary

Modifier and Type	Method and Description
void	consumerCreated(org.apache.kafka.clients.consumer.Consumer<?,?> consumer) Manage bind/close of KafkaClientMetrics for the specified Consumer.
(package private) void	onStop(ShutdownEvent event)
void	producerCreated(org.apache.kafka.clients.producer.Producer<?,?> producer) Manage bind/close of KafkaClientMetrics for the specified Producer.
(package private) void	tryToClose(AutoCloseable c)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

registry

final io.micrometer.core.instrument.MeterRegistry registry

clientMetrics

Map<Object,io.micrometer.core.instrument.binder.kafka.KafkaClientMetrics> clientMetrics

Constructor Detail

KafkaEventObserver

public KafkaEventObserver()

Method Detail

consumerCreated

public void consumerCreated(@Observes
                            org.apache.kafka.clients.consumer.Consumer<?,?> consumer)

Manage bind/close of KafkaClientMetrics for the specified Consumer. If the consumer has not been seen before, it will be bound to the Micrometer registry and instrumented using a Kafka MeterBinder. If the consumer has been seen before, the MeterBinder will be closed.

Parameters:

consumer - Observed Kafka Consumer

producerCreated

public void producerCreated(@Observes
                            org.apache.kafka.clients.producer.Producer<?,?> producer)

Manage bind/close of KafkaClientMetrics for the specified Producer. If the producer has not been seen before, it will be bound to the Micrometer registry and instrumented using a Kafka MeterBinder. If the producer has been seen before, the MeterBinder will be closed.

Parameters:

producer - Observed Kafka Producer

onStop

void onStop(@Observes
            ShutdownEvent event)

tryToClose

void tryToClose(AutoCloseable c)