Class NewPartitions

Method Details

• increaseTo

  public static NewPartitions increaseTo(int totalCount)

  Increase the partition count for a topic to the given totalCount. The assignment of new replicas to brokers will be decided by the broker.

  Parameters:

  totalCount - The total number of partitions after the operation succeeds.

• increaseTo

  public static NewPartitions increaseTo(int totalCount, List<List<Integer>> newAssignments)

  Increase the partition count for a topic to the given totalCount assigning the new partitions according to the given newAssignments. The length of the given newAssignments should equal totalCount - oldCount, since the assignment of existing partitions are not changed. Each inner list of newAssignments should have a length equal to the topic's replication factor. The first broker id in each inner list is the "preferred replica".

  For example, suppose a topic currently has a replication factor of 2, and has 3 partitions. The number of partitions can be increased to 6 using a NewPartition constructed like this:

  
   NewPartitions.increaseTo(6, asList(asList(1, 2),
                                      asList(2, 3),
                                      asList(3, 1)))
   

  In this example partition 3's preferred leader will be broker 1, partition 4's preferred leader will be broker 2 and partition 5's preferred leader will be broker 3.

  Parameters:

  totalCount - The total number of partitions after the operation succeeds.

  newAssignments - The replica assignments for the new partitions.

• totalCount

  public int totalCount()

  The total number of partitions after the operation succeeds.

• assignments

  public List<List<Integer>> assignments()

  The replica assignments for the new partitions, or null if the assignment will be done by the controller.

• toString

  public String toString()

  Overrides:

  toString in class Object