Package org.elasticsearch.gateway

Class PriorityComparator

  • All Implemented Interfaces:
    java.util.Comparator<ShardRouting>
    public abstract class PriorityComparator
extends java.lang.Object
implements java.util.Comparator<ShardRouting>
    A comparator that compares ShardRouting based on it's indexes priority (index.priority), it's creation date (index.creation_date), or eventually by it's index name in reverse order. We try to recover first shards from an index with the highest priority, if that's the same we try to compare the timestamp the index is created and pick the newer first (time-based indices, here the newer indices matter more). If even that is the same, we compare the index name which is useful if the date is baked into the index name. ie logstash-2015.05.03.

    • 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 Settings getIndexSettings​(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 Detail

      • PriorityComparator

        public PriorityComparator()

    • Method Detail

      • getIndexSettings

        protected abstract Settings getIndexSettings​(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.