org.apache.kafka.coordinator.group.api.assignor

Interface SubscribedTopicDescriber

@InterfaceStability.Unstable
public interface SubscribedTopicDescriber

The subscribed topic describer is used by the PartitionAssignor to obtain topic and partition metadata of the subscribed topics. The interface is kept in an internal module until KIP-848 is fully implemented and ready to be released.

Method Summary

Modifier and Type	Method and Description
int	numPartitions(org.apache.kafka.common.Uuid topicId) The number of partitions for the given topic Id.
Set<String>	racksForPartition(org.apache.kafka.common.Uuid topicId, int partition) Returns all the available racks associated with the replicas of the given partition.

Method Detail

numPartitions

int numPartitions(org.apache.kafka.common.Uuid topicId)

The number of partitions for the given topic Id.

Parameters:

topicId - Uuid corresponding to the topic.

Returns:

The number of partitions corresponding to the given topic Id, or -1 if the topic Id does not exist.

racksForPartition

Set<String> racksForPartition(org.apache.kafka.common.Uuid topicId,
                              int partition)

Returns all the available racks associated with the replicas of the given partition.

Parameters:

topicId - Uuid corresponding to the partition's topic.

partition - Partition Id within topic.

Returns:

The set of racks corresponding to the replicas of the topic's partition. If the topic Id does not exist, an empty set is returned.