org.apache.flink.streaming.connectors.kafka

接口 KafkaSerializationSchema<T>

类型参数:

T - the type of values being serialized

所有超级接口:

Serializable

所有已知实现类:

KafkaSerializationSchemaWrapper

@PublicEvolving
public interface KafkaSerializationSchema<T>
extends Serializable

A KafkaSerializationSchema defines how to serialize values of type T into ProducerRecords.

Please also implement KafkaContextAware if your serialization schema needs information about the available partitions and the number of parallel subtasks along with the subtask ID on which the Kafka Producer is running.

方法概要

限定符和类型	方法和说明
default void	open(org.apache.flink.api.common.serialization.SerializationSchema.InitializationContext context) Initialization method for the schema.
org.apache.kafka.clients.producer.ProducerRecord<byte[],byte[]>	serialize(T element, Long timestamp) Serializes given element and returns it as a ProducerRecord.

方法详细资料

open

default void open(org.apache.flink.api.common.serialization.SerializationSchema.InitializationContext context)
           throws Exception

Initialization method for the schema. It is called before the actual working methods serialize(Object, Long) and thus suitable for one time setup work.

The provided SerializationSchema.InitializationContext can be used to access additional features such as e.g. registering user metrics.

参数:

context - Contextual information that can be used during initialization.

抛出:

Exception

serialize

org.apache.kafka.clients.producer.ProducerRecord<byte[],byte[]> serialize(T element,
                                                                          @Nullable
                                                                          Long timestamp)

Serializes given element and returns it as a ProducerRecord.

参数:

element - element to be serialized

timestamp - timestamp (can be null)

返回:

Kafka ProducerRecord