// Instantiate tracer
Tracer tracer = ...

// Optionally register tracer with GlobalTracer
GlobalTracer.register(tracer);

// Instantiate KafkaProducer
KafkaProducer<Integer, String> producer = new KafkaProducer<>(senderProps);

//Decorate KafkaProducer with TracingKafkaProducer
TracingKafkaProducer<Integer, String> tracingProducer = new TracingKafkaProducer<>(producer, 
        tracer);

// Send
tracingProducer.send(...);

// Instantiate KafkaConsumer
KafkaConsumer<Integer, String> consumer = new KafkaConsumer<>(consumerProps);

// Decorate KafkaConsumer with TracingKafkaConsumer
TracingKafkaConsumer<Integer, String> tracingConsumer = new TracingKafkaConsumer<>(consumer, 
        tracer);

//Subscribe
tracingConsumer.subscribe(Collections.singletonList("messages"));

// Get records
ConsumerRecords<Integer, String> records = tracingConsumer.poll(1000);

// To retrieve SpanContext from polled record (Consumer side)
ConsumerRecord<Integer, String> record = ...
SpanContext spanContext = TracingKafkaUtils.extractSpanContext(record.headers(), tracer);

// Create BiFunction for the KafkaProducer that operates on
// (String operationName, ProducerRecord consumerRecord) and
// returns a String to be used as the name
BiFunction<String, ProducerRecord, String> producerSpanNameProvider =
    (operationName, producerRecord) -> "CUSTOM_PRODUCER_NAME";

// Instantiate KafkaProducer
KafkaProducer<Integer, String> producer = new KafkaProducer<>(senderProps);

//Decorate KafkaProducer with TracingKafkaProducer
TracingKafkaProducer<Integer, String> tracingProducer = new TracingKafkaProducer<>(producer, 
        tracer,
        producerSpanNameProvider);
// Spans created by the tracingProducer will now have "CUSTOM_PRODUCER_NAME" as the span name.


// Create BiFunction for the KafkaConsumer that operates on
// (String operationName, ConsumerRecord consumerRecord) and
// returns a String to be used as the name
BiFunction<String, ConsumerRecord, String> consumerSpanNameProvider =
    (operationName, consumerRecord) -> operationName.toUpperCase();
// Instantiate KafkaConsumer
KafkaConsumer<Integer, String> consumer = new KafkaConsumer<>(consumerProps);
// Decorate KafkaConsumer with TracingKafkaConsumer, passing in the consumerSpanNameProvider BiFunction
TracingKafkaConsumer<Integer, String> tracingConsumer = new TracingKafkaConsumer<>(consumer, 
        tracer,
        consumerSpanNameProvider);
// Spans created by the tracingConsumer will now have the capitalized operation name as the span name.
// "receive" -> "RECEIVE"

// Register tracer with GlobalTracer:
GlobalTracer.register(tracer);

// Add TracingProducerInterceptor to sender properties:
senderProps.put(ProducerConfig.INTERCEPTOR_CLASSES_CONFIG, 
          TracingProducerInterceptor.class.getName());

// Instantiate KafkaProducer
KafkaProducer<Integer, String> producer = new KafkaProducer<>(senderProps);

// Send
producer.send(...);

// Add TracingConsumerInterceptor to consumer properties:
consumerProps.put(ConsumerConfig.INTERCEPTOR_CLASSES_CONFIG,
          TracingConsumerInterceptor.class.getName());

// Instantiate KafkaConsumer
KafkaConsumer<Integer, String> consumer = new KafkaConsumer<>(consumerProps);

//Subscribe
consumer.subscribe(Collections.singletonList("messages"));

// Get records
ConsumerRecords<Integer, String> records = consumer.poll(1000);

// To retrieve SpanContext from polled record (Consumer side)
ConsumerRecord<Integer, String> record = ...
SpanContext spanContext = TracingKafkaUtils.extractSpanContext(record.headers(), tracer);

// Instantiate TracingKafkaClientSupplier
KafkaClientSupplier supplier = new TracingKafkaClientSupplier(tracer);

// Provide supplier to KafkaStreams
KafkaStreams streams = new KafkaStreams(builder.build(), new StreamsConfig(config), supplier);
streams.start();

// Declare Tracer bean
@Bean
public Tracer tracer() {
  return ...
}


// Decorate ConsumerFactory with TracingConsumerFactory
@Bean
public ConsumerFactory<Integer, String> consumerFactory() {
  return new TracingConsumerFactory<>(new DefaultKafkaConsumerFactory<>(consumerProps()), tracer());
}

// Decorate ProducerFactory with TracingProducerFactory
@Bean
public ProducerFactory<Integer, String> producerFactory() {
  return new TracingProducerFactory<>(new DefaultKafkaProducerFactory<>(producerProps()), tracer());
}

// Use decorated ProducerFactory in KafkaTemplate 
@Bean
public KafkaTemplate<Integer, String> kafkaTemplate() {
  return new KafkaTemplate<>(producerFactory());
}

// Use an aspect to decorate @KafkaListeners
@Bean
public TracingKafkaAspect tracingKafkaAspect() {
  return new TracingKafkaAspect(tracer());
}

// Create BiFunction for the KafkaProducerFactory that operates on
// (String operationName, ProducerRecord consumerRecord) and
// returns a String to be used as the name
BiFunction<String, ProducerRecord, String> producerSpanNameProvider =
    (operationName, producerRecord) -> "CUSTOM_PRODUCER_NAME";

// Decorate ProducerFactory with TracingProducerFactory
@Bean
public ProducerFactory<Integer, String> producerFactory() {
  return new TracingProducerFactory<>(new DefaultKafkaProducerFactory<>(producerProps()), tracer());
}
// Spans created by the tracingProducer will now have "CUSTOM_PRODUCER_NAME" as the span name.


// Create BiFunction for the KafkaConsumerFactory that operates on
// (String operationName, ConsumerRecord consumerRecord) and
// returns a String to be used as the name
BiFunction<String, ConsumerRecord, String> consumerSpanNameProvider =
    (operationName, consumerRecord) -> operationName.toUpperCase();

// Decorate ConsumerFactory with TracingConsumerFactory
@Bean
public ConsumerFactory<Integer, String> consumerFactory() {
  return new TracingConsumerFactory<>(new DefaultKafkaConsumerFactory<>(consumerProps()), tracer());
}
// Consumers produced by the traced consumerFactory