org.apache.pulsar.client.impl

Class RoundRobinPartitionMessageRouterImpl

java.lang.Object

org.apache.pulsar.client.impl.MessageRouterBase

org.apache.pulsar.client.impl.RoundRobinPartitionMessageRouterImpl

All Implemented Interfaces:

Serializable, MessageRouter

public class RoundRobinPartitionMessageRouterImpl
extends MessageRouterBase

The routing strategy here:

• If a key is present, choose a partition based on a hash of the key.
• If no key is present, choose a partition in a "round-robin" fashion. Batching-Awareness is built-in to improve batching locality.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.pulsar.client.impl.MessageRouterBase

hash

Constructor Summary

Constructors

Constructor and Description
RoundRobinPartitionMessageRouterImpl(HashingScheme hashingScheme, int startPtnIdx, boolean isBatchingEnabled, long maxBatchingDelayMs)
RoundRobinPartitionMessageRouterImpl(HashingScheme hashingScheme, int startPtnIdx, boolean isBatchingEnabled, long maxBatchingDelayMs, Clock clock)

Method Summary

Modifier and Type	Method and Description
int	choosePartition(Message<?> msg, TopicMetadata topicMetadata) Choose a partition based on msg and the topic metadata.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.pulsar.client.api.MessageRouter

choosePartition

Constructor Detail

RoundRobinPartitionMessageRouterImpl

public RoundRobinPartitionMessageRouterImpl(HashingScheme hashingScheme,
                                            int startPtnIdx,
                                            boolean isBatchingEnabled,
                                            long maxBatchingDelayMs)

RoundRobinPartitionMessageRouterImpl

public RoundRobinPartitionMessageRouterImpl(HashingScheme hashingScheme,
                                            int startPtnIdx,
                                            boolean isBatchingEnabled,
                                            long maxBatchingDelayMs,
                                            Clock clock)

Method Detail

choosePartition

public int choosePartition(Message<?> msg,
                           TopicMetadata topicMetadata)

Description copied from interface: MessageRouter

Choose a partition based on msg and the topic metadata.

Parameters:

msg - message to route

topicMetadata - topic metadata

Returns:

the partition to route the message.