org.apache.calcite.adapter.kafka

接口 KafkaRowConverter<K,V>

类型参数:

K - type for Kafka message key, refer to ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG;

V - type for Kafka message value, refer to ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG;

所有已知实现类:

KafkaRowConverterImpl

public interface KafkaRowConverter<K,V>

Interface to handle formatting between Kafka message and Calcite row.

方法概要

限定符和类型	方法和说明
org.apache.calcite.rel.type.RelDataType	rowDataType(String topicName) Generates the row type for a given Kafka topic.
Object[]	toRow(org.apache.kafka.clients.consumer.ConsumerRecord<K,V> message) Parses and reformats a Kafka message from the consumer, to align with row type defined as rowDataType(String).

方法详细资料

rowDataType

org.apache.calcite.rel.type.RelDataType rowDataType(String topicName)

Generates the row type for a given Kafka topic.

参数:

topicName - Kafka topic name

返回:

row type

toRow

Object[] toRow(org.apache.kafka.clients.consumer.ConsumerRecord<K,V> message)

Parses and reformats a Kafka message from the consumer, to align with row type defined as rowDataType(String).

参数:

message - Raw Kafka message record

返回:

fields in the row