org.apache.flink.connector.pulsar.sink.writer.router

Class KeyHashTopicRouter<IN>

java.lang.Object

org.apache.flink.connector.pulsar.sink.writer.router.KeyHashTopicRouter<IN>

Type Parameters:

IN - The message type which should write to Pulsar.

All Implemented Interfaces:

Serializable, TopicRouter<IN>

@Internal
public class KeyHashTopicRouter<IN>
extends Object
implements TopicRouter<IN>

If you choose the TopicRoutingMode.MESSAGE_KEY_HASH policy, we would use this implementation. We would pick the topic by the message key's hash code. If no message key was provided, we would randomly pick one.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
KeyHashTopicRouter(SinkConfiguration sinkConfiguration)

Method Summary

Modifier and Type	Method and Description
String	route(IN in, String key, List<String> partitions, PulsarSinkContext context) Choose the topic by given record & available partition list.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.connector.pulsar.sink.writer.router.TopicRouter

open

Constructor Detail

KeyHashTopicRouter

public KeyHashTopicRouter(SinkConfiguration sinkConfiguration)

Method Detail

route

public String route(IN in,
                    String key,
                    List<String> partitions,
                    PulsarSinkContext context)

Description copied from interface: TopicRouter

Choose the topic by given record & available partition list. You can return a new topic name if you need it.

Specified by:

route in interface TopicRouter<IN>

Parameters:

in - The record instance which need to be written to Pulsar.

key - The key of the message from PulsarMessageBuilder.key(String). It could be null, if message doesn't have a key.

partitions - The available partition list. This could be empty if you don't provide any topics in PulsarSinkBuilder.setTopics(String...). You can return a custom topic, but make sure it should contain a partition index in naming. Using TopicNameUtils.topicNameWithPartition(String, int) can easily create a topic name with partition index.

context - The context contains useful information for determining the topic.

Returns:

The topic name to use.