Package io.debezium.util

Class BoundedConcurrentHashMap.HashEntry<K,V>

java.lang.Object

io.debezium.util.BoundedConcurrentHashMap.HashEntry<K,V>

Direct Known Subclasses:

BoundedConcurrentHashMap.LIRSHashEntry

Enclosing class:

BoundedConcurrentHashMap<K,V>

private static class BoundedConcurrentHashMap.HashEntry<K,V>
extends Object

ConcurrentHashMap list entry. Note that this is never exported out as a user-visible Map.Entry.

Because the value field is volatile, not final, it is legal wrt the Java Memory Model for an unsynchronized reader to see null instead of initial value when read via a data race. Although a reordering leading to this is not likely to ever actually occur, the Segment.readValueUnderLock method is used as a backup in case a null (pre-initialized) value is ever seen in an unsynchronized access method.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) int	hash
(package private) K	key
(package private) BoundedConcurrentHashMap.HashEntry<K,V>	next
(package private) V	value

Constructor Summary

Constructors

Constructor	Description
HashEntry(K key, int hash, BoundedConcurrentHashMap.HashEntry<K,V> next, V value)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	hashCode()
(package private) static <K,V> BoundedConcurrentHashMap.HashEntry<K,V>[]	newArray(int i)

Methods inherited from class java.lang.Object

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

Field Detail

key

final K key

hash

final int hash

value

volatile V value

next

final BoundedConcurrentHashMap.HashEntry<K,V> next

Constructor Detail

HashEntry

HashEntry(K key,
          int hash,
          BoundedConcurrentHashMap.HashEntry<K,V> next,
          V value)

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

newArray

static <K,V> BoundedConcurrentHashMap.HashEntry<K,V>[] newArray(int i)