Hi,
Using Kafka Source in Akka Streams Kafka, I am trying to deserialize an
Avro object using KafkaAvroDeserializer that is created using avro-tools
library.
If I use confluent Kafka Consumer, I can deserialize it like this:
def consumerProperties() = {
val props = new Properties
props.put("bootstrap.servers", kafkaServer)
props.put("group.id", UUID.randomUUID().toString)
props.put("auto.commit.enable", "false")
props.put("auto.offset.reset", "earliest")
props.put("schema.registry.url", schemaUrl)
props.put(KafkaAvroDeserializerConfig.SPECIFIC_AVRO_READER_CONFIG, "true")
props.put("key.deserializer",
"org.apache.kafka.common.serialization.StringDeserializer")
props.put("value.deserializer",
"io.confluent.kafka.serializers.KafkaAvroDeserializer")
props
}
def consume(): Unit ={
val consumer = new KafkaConsumer[String, Person](consumerProperties)
consumer.subscribe(Collections.singletonList(topic))
while(true){
val records : ConsumerRecords[String, Person] =consumer.poll(100)
records.forEach(i => println(i.value().getName))
}
}
But I am unable to deserialize using Kafka source in Akka Streams Kafka.
The consumer settings is of type ConsumerSettings[String, AnyRef], and I think
I need to somehow change it to ConsumerSettings[String, Person]
val consumerSettings = ConsumerSettings(system,new StringDeserializer, new
KafkaAvroDeserializer)
.withBootstrapServers(kafkaServer)
.withGroupId(UUID.randomUUID().toString)
.withProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest")
.withProperty("schema.registry.url", schemaUrl)
.withProperty(KafkaAvroDeserializerConfig.SPECIFIC_AVRO_READER_CONFIG, "true")
.withProperty("key.deserializer",
"org.apache.kafka.common.serialization.StringDeserializer")
.withProperty("value.deserializer",
"io.confluent.kafka.serializers.KafkaAvroDeserializer")
val subscriptions = Subscriptions.topics(topic)
val output = Consumer.plainSource(consumerSettings,subscriptions)
output
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