我试图反序列化来自同一个kafka主题的不同json有效负载。这里问的其他问题,引导我第一次尝试,但我没能让它运行。
正如gary提到的(这里)有一些提示(jsonserializer.add\ type\ info\ headers),但是当我发送和接收这两条消息时,我会得到一个异常。
org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method could not be invoked with the incoming message
Endpoint handler details:
Method [public void com.foo.message.ConsumerImpl.consumeSelf(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.util.Map<java.lang.String, java.lang.Object>,com.foo.message.KafkaMessage,org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.Object>)]
Bean [com.foo.message.ConsumerImpl@6df2a206]; nested exception is org.springframework.messaging.converter.MessageConversionException: Cannot handle message; nested exception is org.springframework.messaging.converter.MessageConversionException: Cannot convert from [com.foo.message.KafkaMessageWithAdditionalField] to [com.foo.message.KafkaMessage] for GenericMessage [payload=com.foo.message.KafkaMessageWithAdditionalField@4e3168f7, headers={kafka_offset=22, kafka_consumer=org.apache.kafka.clients.consumer.KafkaConsumer@c0e2fcf, kafka_timestampType=CREATE_TIME, kafka_receivedMessageKey=null, kafka_receivedPartitionId=0, kafka_receivedTopic=fromBar, kafka_receivedTimestamp=1548310583481}], failedMessage=GenericMessage [payload=com.foo.message.KafkaMessageWithAdditionalField@4e3168f7, headers={kafka_offset=22, kafka_consumer=org.apache.kafka.clients.consumer.KafkaConsumer@c0e2fcf, kafka_timestampType=CREATE_TIME, kafka_receivedMessageKey=null, kafka_receivedPartitionId=0, kafka_receivedTopic=fromBar, kafka_receivedTimestamp=1548310583481}]
at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:292) ~[spring-kafka-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:79) ~[spring-kafka-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:50) ~[spring-kafka-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeOnMessage(KafkaMessageListenerContainer.java:1207) [spring-kafka-2.2.2.RELEASE.jar:2.2.2.RELEASE]
...
loggingerrorhandler在consumerrecord中已经提到了一个(正确的)值。
2019-01-24 07:16:27.630 ERROR 27204 --- [ntainer#2-0-C-1] o.s.kafka.listener.LoggingErrorHandler : Error while processing: ConsumerRecord(topic = fromBar, partition = 0, offset = 22, CreateTime = 1548310583481, serialized key size = -1, serialized value size = 196, headers = RecordHeaders(headers = [], isReadOnly = false), key = null, value = com.foo.bar.message.KafkaMessageWithAdditionalField@4e3168f7)
首先我的配置:
@EnableKafka
@Configuration
public class KafkaConsumerConfig {
@Value("${spring.kafka.bootstrap-servers}")
private String bootstrapServers;
@Bean
public ConsumerFactory<String, KafkaMessage> consumerFactoryMessage()
{
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
return new DefaultKafkaConsumerFactory<>(props, new StringDeserializer(),
new JsonDeserializer<>(KafkaMessage.class));
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, KafkaMessage> kafkaListenerMessageContainerFactory()
{
ConcurrentKafkaListenerContainerFactory<String, KafkaMessage> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactoryMessage());
return factory;
}
@Bean
public ConsumerFactory<String, KafkaMessageWithAdditionalField> consumerFactoryMessageWithAdditionalField()
{
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
return new DefaultKafkaConsumerFactory<>(props, new StringDeserializer(),
new JsonDeserializer<>(KafkaMessageWithAdditionalField.class));
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, KafkaMessageWithAdditionalField> kafkaListenerMessageWithAdditionalFieldContainerFactory()
{
ConcurrentKafkaListenerContainerFactory<String, KafkaMessageWithAdditionalField> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactoryMessageWithAdditionalField());
return factory;
}
}
以下是听众:
@KafkaListener(topicPartitions = @TopicPartition(partitions = "0", topic = "${foo.kafka.topic-springBoot}"), containerFactory = "kafkaListenerMessageContainerFactory")
public void consumeSelf(@Headers Map<String, Object> map, KafkaMessage message, ConsumerRecord<String, Object> cr)
{
log.info("message received %s", message);
}
@KafkaListener(topicPartitions = @TopicPartition(partitions = "0", topic = "${foo.kafka.topic-springBoot}"), containerFactory = "kafkaListenerMessageWithAdditionalFieldContainerFactory")
public void consumeSelfAdd(@Headers Map<String, Object> map, KafkaMessageWithAdditionalField message, ConsumerRecord<String, Object> cr)
{
log.info("messageKafkaMessageWithAdditionalField received %s", message);
}
1条答案
按热度按时间vmdwslir1#
你不能那样做;您有两个不同的侦听器容器,其中的侦听器需要不同的对象。
对于接收不同类型的多个侦听器方法,需要使用
@KafkaListener
在班级层面@KafkaHandler
在方法层面。在课堂上看@kafkalistener。
在类级别使用@kafkalistener时,可以在方法级别指定@kafkahandler。在传递消息时,转换后的消息负载类型用于确定要调用哪个方法。
默认方法是可选的,用于未知的负载类型。
但这只适用于智能反序列化程序(它知道如何转换为不同的有效负载)。
或者,您可以添加
RecordFilterStrategy
到侦听器容器工厂以跳过每个侦听器中的其他记录。