Java Kafka消费者处理二进制图像数据

Question

I'm new to Kafka and currently have a need to extract binary image data. I'm currently using a KafkaAvroDeserializer. The key and values of the ConsumerRecord<byte[], byte[]> is:

Key {"prim_key": -99999999, "seq": 1} 
value {"beforeImage": null, "afterImage": {"prim_key": -99999999, "seq": 1, "bin_data": {"bytes": ..................}}}

How can I extract the "bytes" raw byte data?

Answer 1

If you're using the Avro Deserializer, then you wouldn't use byte arrays as the record types, you could use ConsumerRecord<GenericRecord, GenericRecord> , then extract out the appropriate field from the data

Otherwise, if you only needed byte arrays, the producer would use the ByteArraySerializer which wouldn't be compatible with the Avro Deserializer