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 and Description
RotationShardShuffler(int seed)

Method Summary

Methods

Modifier and Type	Method and Description
int	nextSeed() Return a new seed.
List<ShardRouting>	shuffle(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 Detail

RotationShardShuffler

public RotationShardShuffler(int seed)

Method Detail

nextSeed

public int nextSeed()

Description copied from class: ShardShuffler

Return a new seed.

Specified by:

nextSeed in class ShardShuffler

shuffle

public List<ShardRouting> shuffle(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