How to use zipkin2.collector

 @Override
 public void handleDelivery(
   String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) {
  metrics.incrementMessages();
  this.collector.acceptSpans(body, NOOP);
 }
}

RuntimeException errorReading(String message, Throwable e) {
 metrics.incrementMessagesDropped();
 return doError(message, e);
}

@Override
public Builder storage(StorageComponent storage) {
 delegate.storage(storage);
 return this;
}

ZipkinDispatcher(StorageComponent storage, CollectorMetrics metrics, MockWebServer server) {
 this.consumer = Collector.newBuilder(getClass()).storage(storage).metrics(metrics).build();
 this.metrics = metrics;
 this.server = server;
}

@Override
public Builder metrics(CollectorMetrics metrics) {
 if (metrics == null) throw new NullPointerException("metrics == null");
 this.metrics = metrics.forTransport("scribe");
 delegate.metrics(this.metrics);
 return this;
}

public void acceptSpans(
  byte[] serializedSpans, BytesDecoder<Span> decoder, Callback<Void> callback) {
 metrics.incrementBytes(serializedSpans.length);
 List<Span> spans;
 try {
  spans = decodeList(decoder, serializedSpans);
 } catch (RuntimeException e) {
  callback.onError(errorReading(e));
  return;
 }
 accept(spans, callback);
}

@Override
public Builder sampler(CollectorSampler sampler) {
 delegate.sampler(sampler);
 return this;
}

@Override
public Builder metrics(CollectorMetrics metrics) {
 delegate.metrics(metrics);
 return this;
}

ScribeSpanConsumer(ScribeCollector.Builder builder) {
 this.collector = builder.delegate.build();
 this.metrics = builder.metrics;
 this.category = builder.category;
}

InMemoryCollectorMetrics(ConcurrentHashMap<String, AtomicInteger> metrics, String transport) {
 this.metrics = metrics;
 this.messages = scope("messages", transport);
 this.messagesDropped = scope("messagesDropped", transport);
 this.bytes = scope("bytes", transport);
 this.spans = scope("spans", transport);
 this.spansDropped = scope("spansDropped", transport);
}

 public Collector build() {
  return new Collector(this);
 }
}

@Override
public void onError(Throwable t) {
 errorStoringSpans(spans, t);
}

@Override
public Builder metrics(CollectorMetrics metrics) {
 if (metrics == null) throw new NullPointerException("metrics == null");
 this.metrics = metrics.forTransport("kafka");
 delegate.metrics(this.metrics);
 return this;
}

@Override
public Builder storage(StorageComponent storage) {
 delegate.storage(storage);
 return this;
}

@Override
public Builder sampler(CollectorSampler sampler) {
 delegate.sampler(sampler);
 return this;
}

@Override
public Builder storage(StorageComponent storage) {
 this.delegate.storage(storage);
 return this;
}

@Override
public Builder sampler(CollectorSampler collectorSampler) {
 delegate.sampler(collectorSampler);
 return this;
}

@Override
public Builder storage(StorageComponent storage) {
 delegate.storage(storage);
 return this;
}

@Override
public Builder sampler(CollectorSampler sampler) {
 delegate.sampler(sampler);
 return this;
}

@Override
public Builder storage(StorageComponent storageComponent) {
 delegate.storage(storageComponent);
 return this;
}