adriancole commented on a change in pull request #904: Messaging adapter
URL:
https://github.com/apache/incubator-zipkin-brave/pull/904#discussion_r282297193
##########
File path:
instrumentation/kafka-clients/src/main/java/brave/kafka/clients/KafkaTracing.java
##########
@@ -68,35 +78,56 @@ public KafkaTracing build() {
}
}
- final Tracing tracing;
- final Extractor<Headers> extractor;
- final Injector<Headers> injector;
- final Set<String> propagationKeys;
+ final MessagingTracing msgTracing;
final String remoteServiceName;
+ final List<String> propagationKeys;
+ final Extractor<ConsumerRecord> consumerRecordExtractor;
+ final Injector<ConsumerRecord> consumerRecordInjector;
+ final MessagingConsumerHandler<ConsumerRecord> consumerHandler;
+ final Extractor<ProducerRecord> producerRecordExtractor;
+ final Injector<ProducerRecord> producerRecordInjector;
+ final MessagingProducerHandler<ProducerRecord> producerHandler;
KafkaTracing(Builder builder) { // intentionally hidden constructor
- this.tracing = builder.tracing;
- this.extractor = tracing.propagation().extractor(KafkaPropagation.GETTER);
- List<String> keyList = builder.tracing.propagation().keys();
- // Use a more efficient injector if we are only propagating a single header
+ this.msgTracing = builder.msgTracing;
+ this.remoteServiceName = builder.remoteServiceName;
+ this.propagationKeys = msgTracing.tracing().propagation().keys();
+ final Extractor<Headers> extractor =
msgTracing.tracing().propagation().extractor(KafkaPropagation.HEADERS_GETTER);
+ List<String> keyList = msgTracing.tracing().propagation().keys();
+ boolean singleFormat = false;
if (builder.writeB3SingleFormat ||
keyList.equals(Propagation.B3_SINGLE_STRING.keys())) {
TraceContext testExtraction =
extractor.extract(B3_SINGLE_TEST_HEADERS).context();
if (!TEST_CONTEXT.equals(testExtraction)) {
throw new IllegalArgumentException(
"KafkaTracing.Builder.writeB3SingleFormat set, but
Tracing.Builder.propagationFactory cannot parse this format!");
}
- this.injector = KafkaPropagation.B3_SINGLE_INJECTOR;
- } else {
- this.injector = tracing.propagation().injector(KafkaPropagation.SETTER);
+ singleFormat = true;
}
- this.propagationKeys = new LinkedHashSet<>(keyList);
- this.remoteServiceName = builder.remoteServiceName;
+ this.producerRecordInjector = singleFormat ?
KafkaPropagation.B3_SINGLE_INJECTOR_PRODUCER
+ :
msgTracing.tracing().propagation().injector(KafkaPropagation.PRODUCER_RECORD_SETTER);
+ this.producerRecordExtractor =
+
msgTracing.tracing().propagation().extractor(KafkaPropagation.PRODUCER_RECORD_GETTER);
+ this.producerHandler =
+ MessagingProducerHandler.create(msgTracing,
+ TracingProducer.KafkaProducerAdapter.create(this),
+ producerRecordExtractor, producerRecordInjector);
+ this.consumerRecordInjector = singleFormat ?
KafkaPropagation.B3_SINGLE_INJECTOR_CONSUMER
+ : msgTracing.tracing()
+ .propagation()
+ .injector(KafkaPropagation.CONSUMER_RECORD_SETTER);
+ this.consumerRecordExtractor =
+
msgTracing.tracing().propagation().extractor(KafkaPropagation.CONSUMER_RECORD_GETTER);
+ this.consumerHandler =
+ MessagingConsumerHandler.create(msgTracing,
+ TracingConsumer.KafkaConsumerAdapter.create(this),
+ consumerRecordExtractor, consumerRecordInjector);
+
}
/**
* Extracts or creates a {@link Span.Kind#CONSUMER} span for each message
received. This span is
* injected onto each message so it becomes the parent when a processor
later calls {@link
- * #nextSpan(ConsumerRecord)}.
+ * // #nextSpan(ConsumerRecord)}.
Review comment:
```suggestion
* #nextSpan(ConsumerRecord)}.
```
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