我正在尝试将jsonSerde作为主题的输入,并且应该处理记录并且需要使用kafka stream将其作为Avro消息放在不同的主题中。输出看起来是二进制的并且数据不是实际的JSON格式。看起来像它一样使用默认的bytearrayserde作为值和key.I不知道为什么,但我提供序列化器作为SpecificAvroSerde。
private final static JsonSerde<JsonNode> jsonSerde = new JsonSerde<JsonNode>(JsonNode.class);
private static Map<String, Object> props;
//Serde of specific record
private static SpecificAvroSerde<SpecificRecord> productValueSerde;
@Bean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME)
public StreamsConfig kafkaStreamsConfig()
throws UnknownHostException {
props = new HashMap<>();
props.put(StreamsConfig.APPLICATION_ID_CONFIG,
"*****processor-3");
props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:29092,localhost:19092,localhost:39092");
props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, SpecificAvroSerde.class);
props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, SpecificAvroSerde.class);
props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
props.put(AbstractKafkaAvroSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG,
"http://localhost:18081");
props.put(ConsumerConfig.PARTITION_ASSIGNMENT_STRATEGY_CONFIG, "org.apache.kafka.clients"
+ ".consumer.RoundRobinAssignor");
productValueSerde = new SpecificAvroSerde<SpecificRecord>();
productValueSerde.configure((Collections.singletonMap(
AbstractKafkaAvroSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG,
"http://localhost:18081")),false);
return new StreamsConfig(props);
}
@Bean
public KStream<JsonNode,JsonNode> KStream(StreamsBuilder kStreamBuilder){
KStream<JsonNode,JsonNode> stream = kStreamBuilder.stream("localtest",Consumed.with(jsonSerde, jsonSerde));
try {
KStream<JsonNode,SpecificRecord> avroStream = stream.flatMap((K,V)->actNationalPaperHelper.mapToCoreAvro(K, V));
//avroStream.flatMap((K,V)->System.out.println(V); return avroStream));
avroStream.through("serdetest16",Produced.with(jsonSerde, productValueSerde));
}
catch(Exception e) {
System.out.println(e);
}
return stream;
}
T
发布于 2018-10-11 10:40:41
似乎Serde
在代码中明确地覆盖了配置中的默认值:
avroStream.through("serdetest16",Produced.with(jsonSerde, productValueSerde));
使用Producer.with()
子句,写入的数据"serdetest16"
将写为JSON,如代码中所指定。如果要through
使用Serde
配置中的默认值,则应省略第二个参数或传入Avro-Serdes。
https://stackoverflow.com/questions/-100005065
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