程序包 org.apache.pulsar.common.util.collections

类 ConcurrentLongPairSet

java.lang.Object

org.apache.pulsar.common.util.collections.ConcurrentLongPairSet

所有已实现的接口:

LongPairSet

public class ConcurrentLongPairSet
extends Object
implements LongPairSet

Concurrent hash set where values are composed of pairs of longs.

Provides similar methods as a ConcurrentHashSet<V> but since it's an open hash set with linear probing, no node allocations are required to store the keys and values, and no boxing is required.

Values MUST be >= 0.
WARN: method forEach do not guarantee thread safety, nor does the items method.
The forEach method is specifically designed for single-threaded usage. When iterating over a set with concurrent writes, it becomes possible for new values to be either observed or not observed. There is no guarantee that if we write value1 and value2, and are able to see value2, then we will also see value1.
It is crucial to understand that the results obtained from aggregate status methods such as items are typically reliable only when the map is not undergoing concurrent updates from other threads. When concurrent updates are involved, the results of these methods reflect transient states that may be suitable for monitoring or estimation purposes, but not for program control.

嵌套类概要

嵌套类

修饰符和类型	类	说明
static class	ConcurrentLongPairSet.Builder	Builder of ConcurrentLongPairSet.
static interface	ConcurrentLongPairSet.ConsumerLong	Represents a function that accepts an object of the LongPair type.
static class	ConcurrentLongPairSet.LongPair	Class representing two long values.
static interface	ConcurrentLongPairSet.LongPairConsumer	Represents a function that accepts two long arguments.

从接口继承的嵌套类/接口 org.apache.pulsar.common.util.collections.LongPairSet

LongPairSet.LongPairFunction<T>, LongPairSet.LongPairPredicate

构造器概要

构造器

构造器	说明
ConcurrentLongPairSet()	已过时。
ConcurrentLongPairSet(int expectedItems)	已过时。
ConcurrentLongPairSet(int expectedItems, int concurrencyLevel)	已过时。
ConcurrentLongPairSet(int expectedItems, int concurrencyLevel, float mapFillFactor, float mapIdleFactor, boolean autoShrink, float expandFactor, float shrinkFactor)

方法概要

修饰符和类型	方法	说明
boolean	add(long item1, long item2)	Adds composite value of item1 and item2 to set.
long	capacity()	Returns capacity of the set.
void	clear()	Removes all items from set.
boolean	contains(long item1, long item2)	Checks if given (item1,item2) composite value exists into set.
void	forEach(ConcurrentLongPairSet.LongPairConsumer processor)	Iterate over all the elements in the set and apply the provided function.
boolean	isEmpty()	Check if set is empty.
Set<ConcurrentLongPairSet.LongPair>	items()
Set<ConcurrentLongPairSet.LongPair>	items(int numberOfItems)
<T> Set<T>	items(int numberOfItems, LongPairSet.LongPairFunction<T> longPairConverter)
static ConcurrentLongPairSet.Builder	newBuilder()
boolean	remove(long item1, long item2)	Remove an existing entry if found.
int	removeIf(LongPairSet.LongPairPredicate filter)	Removes all of the elements of this collection that satisfy the given predicate.
long	size()	Returns size of the set.
String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

ConcurrentLongPairSet

@Deprecated
public ConcurrentLongPairSet()

已过时。

ConcurrentLongPairSet

@Deprecated
public ConcurrentLongPairSet(int expectedItems)

已过时。

ConcurrentLongPairSet

@Deprecated
public ConcurrentLongPairSet(int expectedItems,
 int concurrencyLevel)

已过时。

ConcurrentLongPairSet

public ConcurrentLongPairSet(int expectedItems,
 int concurrencyLevel,
 float mapFillFactor,
 float mapIdleFactor,
 boolean autoShrink,
 float expandFactor,
 float shrinkFactor)

方法详细资料

newBuilder

public static ConcurrentLongPairSet.Builder newBuilder()

size

public long size()

从接口复制的说明: LongPairSet

Returns size of the set.

指定者:

size 在接口中 LongPairSet

返回:

capacity

public long capacity()

从接口复制的说明: LongPairSet

Returns capacity of the set.

指定者:

capacity 在接口中 LongPairSet

返回:

isEmpty

public boolean isEmpty()

从接口复制的说明: LongPairSet

Check if set is empty.

指定者:

isEmpty 在接口中 LongPairSet

返回:

contains

public boolean contains(long item1,
 long item2)

从接口复制的说明: LongPairSet

Checks if given (item1,item2) composite value exists into set.

指定者:

contains 在接口中 LongPairSet

返回:

add

public boolean add(long item1,
 long item2)

从接口复制的说明: LongPairSet

Adds composite value of item1 and item2 to set.

指定者:

add 在接口中 LongPairSet

返回:

remove

public boolean remove(long item1,
 long item2)

Remove an existing entry if found.

指定者:

remove 在接口中 LongPairSet

参数:

item1 -

返回:

true if removed or false if item was not present

clear

public void clear()

从接口复制的说明: LongPairSet

Removes all items from set.

指定者:

clear 在接口中 LongPairSet

forEach

public void forEach(ConcurrentLongPairSet.LongPairConsumer processor)

Iterate over all the elements in the set and apply the provided function.

Warning: Do Not Guarantee Thread-Safety.

指定者:

forEach 在接口中 LongPairSet

参数:

processor - the processor to process the elements

removeIf

public int removeIf(LongPairSet.LongPairPredicate filter)

Removes all of the elements of this collection that satisfy the given predicate.

指定者:

removeIf 在接口中 LongPairSet

参数:

filter - a predicate which returns true for elements to be removed

返回:

number of removed values

items

public Set<ConcurrentLongPairSet.LongPair> items()

指定者:

items 在接口中 LongPairSet

返回:

a new set of all keys (makes a copy)

items

public Set<ConcurrentLongPairSet.LongPair> items(int numberOfItems)

指定者:

items 在接口中 LongPairSet

返回:

a new list of keys with max provided numberOfItems (makes a copy)

items

public <T> Set<T> items(int numberOfItems,
 LongPairSet.LongPairFunction<T> longPairConverter)

指定者:

items 在接口中 LongPairSet

longPairConverter - converts (long,long) pair to object

返回:

a new list of keys with max provided numberOfItems

toString

public String toString()

覆盖:

toString 在类中 Object