org.elasticsearch.common.lucene

Class ShardCoreKeyMap

java.lang.Object

org.elasticsearch.common.lucene.ShardCoreKeyMap

public final class ShardCoreKeyMap
extends Object

A map between segment core cache keys and the shard that these segments belong to. This allows to get the shard that a segment belongs to or to get the entire set of live core cache keys for a given index. In order to work this class needs to be notified about new segments. It modifies the current mappings as segments that were not known before are added and prevents the structure from growing indefinitely by registering close listeners on these segments so that at any time it only tracks live segments. NOTE: This is heavy. Avoid using this class unless absolutely required.

Constructor Summary

Constructors

Constructor and Description
ShardCoreKeyMap()

Method Summary

Methods

Modifier and Type	Method and Description
void	add(org.apache.lucene.index.LeafReader reader) Register a LeafReader.
Set<Object>	getCoreKeysForIndex(String index) Get the set of core cache keys associated with the given index.
ShardId	getShardId(Object coreKey) Return the ShardId that holds the given segment, or null if this segment is not tracked.
int	size() Return the number of tracked segments.

Methods inherited from class java.lang.Object

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

Constructor Detail

ShardCoreKeyMap

public ShardCoreKeyMap()

Method Detail

add

public void add(org.apache.lucene.index.LeafReader reader)

Register a LeafReader. This is necessary so that the core cache key of this reader can be found later using getShardId(Object).

getShardId

public ShardId getShardId(Object coreKey)

Return the ShardId that holds the given segment, or null if this segment is not tracked.

getCoreKeysForIndex

public Set<Object> getCoreKeysForIndex(String index)

Get the set of core cache keys associated with the given index.

size

public int size()

Return the number of tracked segments.