Package org.elasticsearch.cluster.routing

Class GroupShardsIterator<ShardIt extends Comparable<ShardIt> & Countable>

java.lang.Object

org.elasticsearch.cluster.routing.GroupShardsIterator<ShardIt>

All Implemented Interfaces:

Iterable<ShardIt>

public final class GroupShardsIterator<ShardIt extends Comparable<ShardIt> & Countable>
extends Object
implements Iterable<ShardIt>

This class implements a compilation of ShardIterators. Each ShardIterator iterated by this Iterable represents a group of shards. ShardsIterators are always returned in ascending order independently of their order at construction time. The incoming iterators are sorted to ensure consistent iteration behavior across Nodes / JVMs.

Constructor Summary

Constructors

Constructor	Description
GroupShardsIterator(List<ShardIt> iterators)	Constructs a new GroupShardsIterator from the given list.

Method Summary

Modifier and Type	Method	Description
ShardIt	get(int index)
Iterator<ShardIt>	iterator()
int	size()	Return the number of groups
static <ShardIt extends Comparable<ShardIt> & Countable> GroupShardsIterator<ShardIt>	sortAndCreate(List<ShardIt> iterators)	Constructs a new sorted GroupShardsIterator from the given list.
int	totalSize()	Returns the total number of shards within all groups
int	totalSizeWith1ForEmpty()	Returns the total number of shards plus the number of empty groups

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

GroupShardsIterator

public GroupShardsIterator(List<ShardIt> iterators)

Constructs a new GroupShardsIterator from the given list.

Method Details

sortAndCreate

public static <ShardIt extends Comparable<ShardIt> & Countable>
GroupShardsIterator<ShardIt> sortAndCreate(List<ShardIt> iterators)

Constructs a new sorted GroupShardsIterator from the given list. Items are sorted based on their natural ordering.

See Also:

• PlainShardIterator.compareTo(ShardIterator)

totalSize

public int totalSize()

Returns the total number of shards within all groups

Returns:

total number of shards

totalSizeWith1ForEmpty

public int totalSizeWith1ForEmpty()

Returns the total number of shards plus the number of empty groups

Returns:

number of shards and empty groups

size

public int size()

Return the number of groups

Returns:

number of groups

iterator

public Iterator<ShardIt> iterator()

Specified by:

iterator in interface Iterable<ShardIt extends Comparable<ShardIt> & Countable>

get

public ShardIt get(int index)