io.lettuce.core.cluster.topology

Class TopologyComparators

java.lang.Object

io.lettuce.core.cluster.topology.TopologyComparators

public class TopologyComparators
extends Object

Comparators for RedisClusterNode and RedisURI.

Author:

Mark Paluch, Alessandro Simi

Constructor Summary

Constructors

Constructor and Description
TopologyComparators()

Method Summary

Modifier and Type	Method and Description
static boolean	isChanged(Partitions o1, Partitions o2) Check if properties changed which are essential for cluster operations.
static List<RedisClusterNode>	predefinedSort(Iterable<RedisClusterNode> clusterNodes, Iterable<RedisURI> fixedOrder) Sort partitions by a fixedOrder and by RedisURI.
static List<RedisClusterNode>	sortByClientCount(Iterable<RedisClusterNode> clusterNodes) Sort partitions by client count.
static List<RedisClusterNode>	sortByLatency(Iterable<RedisClusterNode> clusterNodes) Sort partitions by latency.
static List<RedisClusterNode>	sortByUri(Iterable<RedisClusterNode> clusterNodes) Sort partitions by RedisURI.

Methods inherited from class java.lang.Object

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

Constructor Detail

TopologyComparators

public TopologyComparators()

Method Detail

predefinedSort

public static List<RedisClusterNode> predefinedSort(Iterable<RedisClusterNode> clusterNodes,
                                                    Iterable<RedisURI> fixedOrder)

Sort partitions by a fixedOrder and by RedisURI. Nodes are sorted as provided in fixedOrder. RedisURIss not contained in fixedOrder are ordered after the fixed sorting and sorted wihin the block by comparing RedisURI.

Parameters:

clusterNodes - the sorting input

fixedOrder - the fixed order part

Returns:

List containing RedisClusterNodes ordered by fixedOrder and RedisURI

See Also:

sortByUri(Iterable)

sortByUri

public static List<RedisClusterNode> sortByUri(Iterable<RedisClusterNode> clusterNodes)

Sort partitions by RedisURI.

Parameters:

clusterNodes -

Returns:

List containing RedisClusterNodes ordered by RedisURI

sortByClientCount

public static List<RedisClusterNode> sortByClientCount(Iterable<RedisClusterNode> clusterNodes)

Sort partitions by client count.

Parameters:

clusterNodes -

Returns:

List containing RedisClusterNodes ordered by client count

sortByLatency

public static List<RedisClusterNode> sortByLatency(Iterable<RedisClusterNode> clusterNodes)

Sort partitions by latency.

Parameters:

clusterNodes -

Returns:

List containing RedisClusterNodes ordered by latency

isChanged

public static boolean isChanged(Partitions o1,
                                Partitions o2)

Check if properties changed which are essential for cluster operations.

Parameters:

o1 - the first object to be compared.

o2 - the second object to be compared.

Returns:

true if UPSTREAM or REPLICA flags changed or the responsible slots changed.