Package org.elasticsearch.cluster.routing

Class RotationShardShuffler

java.lang.Object
org.elasticsearch.cluster.routing.ShardShuffler
org.elasticsearch.cluster.routing.RotationShardShuffler
public class RotationShardShuffler
extends ShardShuffler
Basic ShardShuffler implementation that uses an AtomicInteger to generate seeds and uses a rotation to permute shards.

  • Constructor Summary

    Constructors
    Constructor Description
    RotationShardShuffler​(int seed)  

  • Method Summary

    Modifier and Type Method Description
    int nextSeed()
    Return a new seed.
    java.util.List<ShardRouting> shuffle​(java.util.List<ShardRouting> shards, int seed)
    Return a shuffled view over the list of shards.

    Methods inherited from class org.elasticsearch.cluster.routing.ShardShuffler

    shuffle

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • RotationShardShuffler

      public RotationShardShuffler​(int seed)

  • Method Details

    • nextSeed

      public int nextSeed()
      Description copied from class: ShardShuffler
      Return a new seed.
      Specified by:
      nextSeed in class ShardShuffler

    • shuffle

      public java.util.List<ShardRouting> shuffle​(java.util.List<ShardRouting> shards, int seed)
      Description copied from class: ShardShuffler
      Return a shuffled view over the list of shards. The behavior of this method must be deterministic: if the same list and the same seed are provided twice, then the result needs to be the same.
      Specified by:
      shuffle in class ShardShuffler