org.apache.kafka.common

Class Cluster

java.lang.Object

org.apache.kafka.common.Cluster

public final class Cluster
extends Object

An immutable representation of a subset of the nodes, topics, and partitions in the Kafka cluster.

Constructor Summary

Constructors

Constructor and Description
Cluster(String clusterId, Collection<Node> nodes, Collection<PartitionInfo> partitions, Set<String> unauthorizedTopics, Set<String> internalTopics) Create a new cluster with the given id, nodes and partitions
Cluster(String clusterId, Collection<Node> nodes, Collection<PartitionInfo> partitions, Set<String> unauthorizedTopics, Set<String> internalTopics, Node controller) Create a new cluster with the given id, nodes and partitions
Cluster(String clusterId, Collection<Node> nodes, Collection<PartitionInfo> partitions, Set<String> unauthorizedTopics, Set<String> invalidTopics, Set<String> internalTopics, Node controller) Create a new cluster with the given id, nodes and partitions
Cluster(String clusterId, Collection<Node> nodes, Collection<PartitionInfo> partitions, Set<String> unauthorizedTopics, Set<String> invalidTopics, Set<String> internalTopics, Node controller, Map<String,Uuid> topicIds) Create a new cluster with the given id, nodes, partitions and topicIds

Method Summary

Modifier and Type	Method and Description
List<PartitionInfo>	availablePartitionsForTopic(String topic) Get the list of available partitions for this topic
static Cluster	bootstrap(List<InetSocketAddress> addresses) Create a "bootstrap" cluster using the given list of host/ports
ClusterResource	clusterResource()
Node	controller()
static Cluster	empty() Create an empty cluster instance with no nodes and no topic-partitions.
boolean	equals(Object o)
int	hashCode()
Set<String>	internalTopics()
Set<String>	invalidTopics()
boolean	isBootstrapConfigured()
Node	leaderFor(TopicPartition topicPartition) Get the current leader for the given topic-partition
List<Integer>	leadersForTopic(String topic) Get the list of leaders for this topic
Node	nodeById(int id) Get the node by the node id (or null if the node is not online or does not exist)
Optional<Node>	nodeIfOnline(TopicPartition partition, int id) Get the node by node id if the replica for the given partition is online
List<Node>	nodes()
PartitionInfo	partition(TopicPartition topicPartition) Get the metadata for the specified partition
Integer	partitionCountForTopic(String topic) Get the number of partitions for the given topic.
List<PartitionInfo>	partitionsForNode(int nodeId) Get the list of partitions whose leader is this node
List<PartitionInfo>	partitionsForTopic(String topic) Get the list of partitions for this topic
Uuid	topicId(String topic)
Collection<Uuid>	topicIds()
String	topicName(Uuid topicId)
Set<String>	topics() Get all topics.
String	toString()
Set<String>	unauthorizedTopics()
Cluster	withPartitions(Map<TopicPartition,PartitionInfo> partitions) Return a copy of this cluster combined with `partitions`.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Cluster

public Cluster(String clusterId,
               Collection<Node> nodes,
               Collection<PartitionInfo> partitions,
               Set<String> unauthorizedTopics,
               Set<String> internalTopics)

Create a new cluster with the given id, nodes and partitions

Parameters:

nodes - The nodes in the cluster

partitions - Information about a subset of the topic-partitions this cluster hosts

Cluster

public Cluster(String clusterId,
               Collection<Node> nodes,
               Collection<PartitionInfo> partitions,
               Set<String> unauthorizedTopics,
               Set<String> internalTopics,
               Node controller)

Create a new cluster with the given id, nodes and partitions

Parameters:

nodes - The nodes in the cluster

partitions - Information about a subset of the topic-partitions this cluster hosts

Cluster

public Cluster(String clusterId,
               Collection<Node> nodes,
               Collection<PartitionInfo> partitions,
               Set<String> unauthorizedTopics,
               Set<String> invalidTopics,
               Set<String> internalTopics,
               Node controller)

Create a new cluster with the given id, nodes and partitions

Parameters:

nodes - The nodes in the cluster

partitions - Information about a subset of the topic-partitions this cluster hosts

Cluster

public Cluster(String clusterId,
               Collection<Node> nodes,
               Collection<PartitionInfo> partitions,
               Set<String> unauthorizedTopics,
               Set<String> invalidTopics,
               Set<String> internalTopics,
               Node controller,
               Map<String,Uuid> topicIds)

Create a new cluster with the given id, nodes, partitions and topicIds

Parameters:

nodes - The nodes in the cluster

partitions - Information about a subset of the topic-partitions this cluster hosts

Method Detail

empty

public static Cluster empty()

Create an empty cluster instance with no nodes and no topic-partitions.

bootstrap

public static Cluster bootstrap(List<InetSocketAddress> addresses)

Create a "bootstrap" cluster using the given list of host/ports

Parameters:

addresses - The addresses

Returns:

A cluster for these hosts/ports

withPartitions

public Cluster withPartitions(Map<TopicPartition,PartitionInfo> partitions)

Return a copy of this cluster combined with `partitions`.

nodes

public List<Node> nodes()

Returns:

The known set of nodes

nodeById

public Node nodeById(int id)

Get the node by the node id (or null if the node is not online or does not exist)

Parameters:

id - The id of the node

Returns:

The node, or null if the node is not online or does not exist

nodeIfOnline

public Optional<Node> nodeIfOnline(TopicPartition partition,
                                   int id)

Get the node by node id if the replica for the given partition is online

Parameters:

partition -

id -

Returns:

the node

leaderFor

public Node leaderFor(TopicPartition topicPartition)

Get the current leader for the given topic-partition

Parameters:

topicPartition - The topic and partition we want to know the leader for

Returns:

The node that is the leader for this topic-partition, or null if there is currently no leader

partition

public PartitionInfo partition(TopicPartition topicPartition)

Get the metadata for the specified partition

Parameters:

topicPartition - The topic and partition to fetch info for

Returns:

The metadata about the given topic and partition, or null if none is found

partitionsForTopic

public List<PartitionInfo> partitionsForTopic(String topic)

Get the list of partitions for this topic

Parameters:

topic - The topic name

Returns:

A list of partitions

leadersForTopic

public List<Integer> leadersForTopic(String topic)

Get the list of leaders for this topic

Parameters:

topic - The topic name

Returns:

A list of leaders

partitionCountForTopic

public Integer partitionCountForTopic(String topic)

Get the number of partitions for the given topic.

Parameters:

topic - The topic to get the number of partitions for

Returns:

The number of partitions or null if there is no corresponding metadata

availablePartitionsForTopic

public List<PartitionInfo> availablePartitionsForTopic(String topic)

Get the list of available partitions for this topic

Parameters:

topic - The topic name

Returns:

A list of partitions

partitionsForNode

public List<PartitionInfo> partitionsForNode(int nodeId)

Get the list of partitions whose leader is this node

Parameters:

nodeId - The node id

Returns:

A list of partitions

topics

public Set<String> topics()

Get all topics.

Returns:

a set of all topics

unauthorizedTopics

public Set<String> unauthorizedTopics()

invalidTopics

public Set<String> invalidTopics()

internalTopics

public Set<String> internalTopics()

isBootstrapConfigured

public boolean isBootstrapConfigured()

clusterResource

public ClusterResource clusterResource()

controller

public Node controller()

topicIds

public Collection<Uuid> topicIds()

topicId

public Uuid topicId(String topic)

topicName

public String topicName(Uuid topicId)

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object