org.apache.flink.streaming.connectors.kafka.partitioner

类 FlinkKafkaPartitioner<T>

java.lang.Object

org.apache.flink.streaming.connectors.kafka.partitioner.FlinkKafkaPartitioner<T>

所有已实现的接口:

Serializable

直接已知子类:

FlinkFixedPartitioner

@PublicEvolving
public abstract class FlinkKafkaPartitioner<T>
extends Object
implements Serializable

A FlinkKafkaPartitioner wraps logic on how to partition records across partitions of multiple Kafka topics.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
FlinkKafkaPartitioner()

方法概要

限定符和类型	方法和说明
void	open(int parallelInstanceId, int parallelInstances) Initializer for the partitioner.
abstract int	partition(T record, byte[] key, byte[] value, String targetTopic, int[] partitions) Determine the id of the partition that the record should be written to.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

FlinkKafkaPartitioner

public FlinkKafkaPartitioner()

方法详细资料

open

public void open(int parallelInstanceId,
                 int parallelInstances)

Initializer for the partitioner. This is called once on each parallel sink instance of the Flink Kafka producer. This method should be overridden if necessary.

参数:

parallelInstanceId - 0-indexed id of the parallel sink instance in Flink

parallelInstances - the total number of parallel instances

partition

public abstract int partition(T record,
                              byte[] key,
                              byte[] value,
                              String targetTopic,
                              int[] partitions)

Determine the id of the partition that the record should be written to.

参数:

record - the record value

key - serialized key of the record

value - serialized value of the record

targetTopic - target topic for the record

partitions - found partitions for the target topic

返回:

the id of the target partition