Package org.apache.pulsar.broker.service
Class ConsistentHashingStickyKeyConsumerSelector
java.lang.Object
org.apache.pulsar.broker.service.ConsistentHashingStickyKeyConsumerSelector
- All Implemented Interfaces:
StickyKeyConsumerSelector
public class ConsistentHashingStickyKeyConsumerSelector
extends Object
implements StickyKeyConsumerSelector
This is a consumer selector based fixed hash range.
The implementation uses consistent hashing to evenly split, the
number of keys assigned to each consumer.
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Field Summary
Fields inherited from interface org.apache.pulsar.broker.service.StickyKeyConsumerSelector
DEFAULT_RANGE_SIZE -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidaddConsumer(Consumer consumer) Add a new consumer.Get key hash ranges handled by each consumer.voidremoveConsumer(Consumer consumer) Remove the consumer.select(int hash) Select a consumer by hash.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.apache.pulsar.broker.service.StickyKeyConsumerSelector
select
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Constructor Details
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ConsistentHashingStickyKeyConsumerSelector
public ConsistentHashingStickyKeyConsumerSelector(int numberOfPoints)
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Method Details
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addConsumer
Description copied from interface:StickyKeyConsumerSelectorAdd a new consumer.- Specified by:
addConsumerin interfaceStickyKeyConsumerSelector- Parameters:
consumer- new consumer- Throws:
BrokerServiceException.ConsumerAssignException
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removeConsumer
Description copied from interface:StickyKeyConsumerSelectorRemove the consumer.- Specified by:
removeConsumerin interfaceStickyKeyConsumerSelector- Parameters:
consumer- consumer to be removed
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select
Description copied from interface:StickyKeyConsumerSelectorSelect a consumer by hash.- Specified by:
selectin interfaceStickyKeyConsumerSelector- Parameters:
hash- hash corresponding to sticky key- Returns:
- consumer
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getConsumerKeyHashRanges
Description copied from interface:StickyKeyConsumerSelectorGet key hash ranges handled by each consumer.- Specified by:
getConsumerKeyHashRangesin interfaceStickyKeyConsumerSelector- Returns:
- A map where key is a consumer name and value is list of hash range it receiving message for.
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