带有kafka lib的反序列化原始AVRO KEY [英] Deserialization PRIMITIVE AVRO KEY with kafka lib

问题描述

我目前无法在KSTREAM APP中反序列化原始PRIMITIVE密钥

以avro模式编码的密钥(已在模式注册表中注册)，

当我使用kafka-avro-console-consumer时，我可以看到密钥已正确反序列化

但是不可能使其在KSTREAM应用程序中工作

密钥的avro模式是原始的:

 {"type":"string"}
 

我已经关注了合流的文档

 final Serde<V> valueSpecificAvroSerde = new SpecificAvroSerde<>();
final Map<String, String> serdeConfig = Collections.singletonMap(SCHEMA_REGISTRY_URL_CONFIG, schemaRegistryUrl);
valueSpecificAvroSerde.configure(serdeConfig, false);

final Serdes.StringSerde keySpecificAvroSerde = new Serdes.StringSerde();
keySpecificAvroSerde.configure(serdeConfig, true);

Consumed<String, totoAvro> inputConf = Consumed.with(keySpecificAvroSerde, valueSpecificAvroSerde);

final KStream<String, totoAvro> mystream = builder.stream("name topic", inputConf);

mystream.peek((key, value) -> logger.info("topic KEY :" + key))

 

对于该值来说效果很好，但是键将是一个字符串，该字符串包含模式注册表中的字节，而不仅仅是"reel"键

https://docs.confluent.io/current/schema-registry/serializer-formatter.html#wire-format

因此字符串键为/§/./11016015201 ，但我希望使用卷轴值: 1016015201

如果我在字符串中打印字节，则为[0x00 0x00 0x00 0x02 0x31 0x14 0x31 0x30 0x31 0x36 0x30 0x31 0x35 0x32 0x30 0x31]

解决方案

更新

它现在正在工作: https://stackoverflow.com/a/51957801/6227500

原始答案

该功能当前在架构注册表项目中不可用.

但是通过实现自定义SERDE，您可以管理案件，

Thiyaga Rajan提出了可行的实施方案

用于AVRO基本类型的Serde类

I'm currently incapable of deserialize an avro PRIMITIVE key in a KSTREAM APP

the key in encoded with an avro schema ( registered in the schema registry ) ,

when i use the kafka-avro-console-consumer, I can see that the key is correctly deserialize

But impossible to make it work in a KSTREAM app

the avro schema of the key is a PRIMITIVE:

{"type":"string"}

I already followed the documentation of confluent

final Serde<V> valueSpecificAvroSerde = new SpecificAvroSerde<>();
final Map<String, String> serdeConfig = Collections.singletonMap(SCHEMA_REGISTRY_URL_CONFIG, schemaRegistryUrl);
valueSpecificAvroSerde.configure(serdeConfig, false);

final Serdes.StringSerde keySpecificAvroSerde = new Serdes.StringSerde();
keySpecificAvroSerde.configure(serdeConfig, true);

Consumed<String, totoAvro> inputConf = Consumed.with(keySpecificAvroSerde, valueSpecificAvroSerde);

final KStream<String, totoAvro> mystream = builder.stream("name topic", inputConf);

mystream.peek((key, value) -> logger.info("topic KEY :" + key))

it's working well for the value, but the key is going to be a string containing the bytes from the schema registry and not only the "reel" key

https://docs.confluent.io/current/schema-registry/serializer-formatter.html#wire-format

So the string key is /§/./11016015201 , but I would like the reel value : 1016015201

if I print the bytes inside the String it's [ 0x00 0x00 0x00 0x02 0x31 0x14 0x31 0x30 0x31 0x36 0x30 0x31 0x35 0x32 0x30 0x31 ]

解决方案

Update

it's now working : https://stackoverflow.com/a/51957801/6227500

Original answer

The feature is not available currently in the schema registry project.

But by implementing a custom SERDE you can manage the case ,

Thiyaga Rajan proposed a working implementation

Serde class for AVRO primitive type

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