Module org.apache.lucene.sandbox

Package org.apache.lucene.sandbox.facet.cutters

Class LongValueFacetCutter.LongIntHashMapSyncCompute

java.lang.Object

org.apache.lucene.internal.hppc.LongIntHashMap

org.apache.lucene.sandbox.facet.cutters.LongValueFacetCutter.LongIntHashMapSyncCompute

All Implemented Interfaces:

Cloneable, Iterable<LongIntHashMap.LongIntCursor>, Accountable

Enclosing class:

LongValueFacetCutter

private static class LongValueFacetCutter.LongIntHashMapSyncCompute
extends LongIntHashMap

LongIntHashMap with threadsafe computeIfAbsent method

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.internal.hppc.LongIntHashMap

LongIntHashMap.KeysContainer, LongIntHashMap.LongIntCursor, LongIntHashMap.ValuesContainer

Field Summary

Fields

Modifier and Type	Field	Description
private final Lock	r
private final ReentrantReadWriteLock	rwl
private final Lock	w

Fields inherited from class org.apache.lucene.internal.hppc.LongIntHashMap

assigned, hasEmptyKey, iterationSeed, keys, loadFactor, mask, resizeAt, values

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Modifier	Constructor	Description
private	LongIntHashMapSyncCompute()

Method Summary

Modifier and Type	Method	Description
int	computeIfAbsent(long key, IntSupplier valueSupplier)	If key exists in the map return its value, otherwise insert value from the value supplier and return it.

Methods inherited from class org.apache.lucene.internal.hppc.LongIntHashMap

addTo, allocateBuffers, allocateThenInsertThenRehash, clear, clone, containsKey, ensureCapacity, equalElements, equals, from, get, getOrDefault, hashCode, hashKey, indexExists, indexGet, indexInsert, indexOf, indexRemove, indexReplace, isEmpty, iterator, keys, nextIterationSeed, put, putAll, putIfAbsent, putOrAdd, ramBytesUsed, rehash, release, remove, shiftConflictingKeys, size, toString, values, verifyLoadFactor

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

rwl

private final ReentrantReadWriteLock rwl

r

private final Lock r

w

private final Lock w

Constructor Details

LongIntHashMapSyncCompute

private LongIntHashMapSyncCompute()

Method Details

computeIfAbsent

public int computeIfAbsent(long key,
 IntSupplier valueSupplier)

If key exists in the map return its value, otherwise insert value from the value supplier and return it.

The method is threadsafe, and it allows concurrent reading from the map, but it locks the map to insert a new value as it might require rehashing.