Package org.apache.pekko.cluster.sharding.typed

Class HashCodeNoEnvelopeMessageExtractor<M>

java.lang.Object

org.apache.pekko.cluster.sharding.typed.ShardingMessageExtractor<M,M>

org.apache.pekko.cluster.sharding.typed.HashCodeNoEnvelopeMessageExtractor<M>

Type Parameters:

M - The type of message accepted by the entity actor

public abstract class HashCodeNoEnvelopeMessageExtractor<M>
extends ShardingMessageExtractor<M,M>

Default message extractor type, using a property of the message to identify what entity a message is for and the hashcode of the entityId to decide which shard an entity belongs to.

This is recommended since it does not force details about sharding into the entity protocol

Constructor Summary

Constructors

Constructor	Description
HashCodeNoEnvelopeMessageExtractor(int numberOfShards)

Method Summary

Modifier and Type	Method	Description
int	numberOfShards()
String	shardId(String entityId)	The shard identifier for a given entity id.
String	toString()
final M	unwrapMessage(M message)	Extract the message to send to the entity from an incoming message.

Methods inherited from class org.apache.pekko.cluster.sharding.typed.ShardingMessageExtractor

apply, entityId, noEnvelope

Methods inherited from class java.lang.Object

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

Constructor Details

HashCodeNoEnvelopeMessageExtractor

public HashCodeNoEnvelopeMessageExtractor(int numberOfShards)

Method Details

numberOfShards

public int numberOfShards()

shardId

public String shardId(String entityId)

Description copied from class: ShardingMessageExtractor

The shard identifier for a given entity id. Only messages that passed the ShardingMessageExtractor.entityId(E) function will be used as input to this function.

Specified by:

shardId in class ShardingMessageExtractor<M,M>

toString

public String toString()

Overrides:

toString in class Object

unwrapMessage

public final M unwrapMessage(M message)

Description copied from class: ShardingMessageExtractor

Extract the message to send to the entity from an incoming message. Note that the extracted message does not have to be the same as the incoming message to support wrapping in message envelope that is unwrapped before sending to the entity actor.

Specified by:

unwrapMessage in class ShardingMessageExtractor<M,M>