org.apache.flink.connector.pulsar.source.enumerator.topic.range

Interface RangeGenerator

All Superinterfaces:

Serializable

All Known Implementing Classes:

FixedRangeGenerator, FullRangeGenerator, UniformRangeGenerator

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@PublicEvolving
 @FunctionalInterface
public interface RangeGenerator
extends Serializable

A generator for generating the TopicRange for given topic. It was used for pulsar's SubscriptionType.Key_Shared mode. TopicRange would be used in KeySharedPolicy for different pulsar source readers.

If you implement this interface, make sure that each TopicRange would be assigned to a specified source reader. Since flink parallelism is provided, make sure the pulsar message key's hashcode is evenly distributed among these topic ranges.

Method Summary

Modifier and Type	Method and Description
default void	open(org.apache.flink.configuration.Configuration configuration, SourceConfiguration sourceConfiguration) Deprecated. Use open(SourceConfiguration) instead.
default void	open(SourceConfiguration sourceConfiguration) Initialize some extra resource when bootstrap the source.
List<TopicRange>	range(TopicMetadata metadata, int parallelism) Generate range for the given topic.

Method Detail

range

List<TopicRange> range(TopicMetadata metadata,
                       int parallelism)

Generate range for the given topic.

Parameters:

metadata - The metadata of the topic.

parallelism - The reader size for this topic.

open

default void open(SourceConfiguration sourceConfiguration)

Initialize some extra resource when bootstrap the source.

open

@Deprecated
default void open(org.apache.flink.configuration.Configuration configuration,
                              SourceConfiguration sourceConfiguration)

Deprecated. Use open(SourceConfiguration) instead.