Cannot pass custom tags to TracingKafkaUtils. buildAndInjectSpan

[zrashwani]

Hello all,
I found that we cannot pass some custom tags via TracingKafkaUtils.buildAndInjectSpan method, which we usually need when using this library, so we end up writing our wrapper class with the needed method to add the tags.

Is there another way to pass custom tags to spans created with this class?
and in case you think it is a useful feature that can be added to the library, I intend to contribute by adding another variation of buildAndInjectSpan method with additionalTags parameter.

[malafeev]

@zrashwani new method should have parameter Collection<SpanDecorator> spanDecorators. That's way to set additional tags.

[mysteryer]

@malafeev but I can't add a new spanDecorators in 'TracingKafkaProducer', because constructor function TracingKafkaProducer(producer,tracer, spanDecorators,producerSpanNameProvider) is default.

[mysteryer]

@malafeev how can I change the private member Collection<SpanDecorator> spanDecorators.

[DieBauer]

The c'tor is private. But the Builder has access with the withDecorators.

https://github.com/opentracing-contrib/java-kafka-client/blob/31ce5260279c2cadf3d69c0acbd50f024afe4660/opentracing-kafka-client/src/main/java/io/opentracing/contrib/kafka/TracingKafkaProducerBuilder.java