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

Class KafkaPartitioner<T>

java.lang.Object

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

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FixedPartitioner

public abstract class KafkaPartitioner<T>
extends Object
implements Serializable

It contains a open() method which is called on each parallel instance. Partitioners must be serializable!

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
KafkaPartitioner()

Method Summary

Methods

Modifier and Type	Method and Description
void	open(int parallelInstanceId, int parallelInstances, int[] partitions) Initializer for the Partitioner.
abstract int	partition(T next, byte[] serializedKey, byte[] serializedValue, int numPartitions)

Methods inherited from class java.lang.Object

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

Constructor Detail

KafkaPartitioner

public KafkaPartitioner()

Method Detail

open

public void open(int parallelInstanceId,
        int parallelInstances,
        int[] partitions)

Initializer for the Partitioner.

Parameters:

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

parallelInstances - the total number of parallel instances

partitions - an array describing the partition IDs of the available Kafka partitions.

partition

public abstract int partition(T next,
            byte[] serializedKey,
            byte[] serializedValue,
            int numPartitions)