Confluent schema registry currently support json schema. Does spring kafka provides support for json schema?
Avro with spring kafka works well using this config
spring:
kafka:
producer:
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: io.confluent.kafka.serializers.KafkaAvroSerializer
consumer:
group-id: template-cg
auto-offset-reset: earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: io.confluent.kafka.serializers.KafkaAvroDeserializer
properties:
schema.registry.url: "http://localhost:8081"
But how to configure spring kafka to use json schema + confluent schema registry?
OK, as gary guides, this is not spring problem. Need to configure kafka like this.
spring:
kafka:
producer:
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: io.confluent.kafka.serializers.json.KafkaJsonSchemaSerializer
consumer:
group-id: template-cg
auto-offset-reset: earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: io.confluent.kafka.serializers.json.KafkaJsonSchemaDeserializer
properties:
schema.registry.url: http://localhost:8081
Dependency (gradle)
repositories {
mavenCentral()
maven {
url "https://packages.confluent.io/maven/"
}
maven {
url "https://jitpack.io"
}
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
implementation 'org.springframework.kafka:spring-kafka'
implementation 'io.confluent:kafka-json-schema-serializer:6.1.0'
implementation 'com.github.everit-org.json-schema:org.everit.json.schema:1.12.2'
}
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