Package org.elasticsearch.gateway

Class PriorityComparator

java.lang.Object

org.elasticsearch.gateway.PriorityComparator

All Implemented Interfaces:

Comparator<ShardRouting>

public abstract class PriorityComparator
extends Object
implements Comparator<ShardRouting>

A comparator that compares ShardRouting instances based on various properties. Instances are ordered as follows.

1. First, system indices are ordered before non-system indices
2. Then indices are ordered by their priority, in descending order (index.priority)
3. Then newer indices are ordered before older indices, based on their creation date. This benefits time-series indices, where newer indices are considered more urgent (index.creation_date)
4. Lastly the index names are compared, which is useful when a date is baked into the index name, e.g. logstash-2015.05.03

Constructor Summary

Constructors

Constructor	Description
PriorityComparator()

Method Summary

Modifier and Type	Method	Description
int	compare(ShardRouting o1, ShardRouting o2)
static PriorityComparator	getAllocationComparator(RoutingAllocation allocation)	Returns a PriorityComparator that uses the RoutingAllocation index metadata to access the index setting per index.
protected abstract IndexMetadata	getMetadata(Index index)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

PriorityComparator

public PriorityComparator()

Method Details

compare

public final int compare(ShardRouting o1,
 ShardRouting o2)

Specified by:

compare in interface Comparator<ShardRouting>

getMetadata

protected abstract IndexMetadata getMetadata(Index index)

getAllocationComparator

public static PriorityComparator getAllocationComparator(RoutingAllocation allocation)

Returns a PriorityComparator that uses the RoutingAllocation index metadata to access the index setting per index.