org.apache.flink.runtime.state

类 KeyGroupRange

java.lang.Object

org.apache.flink.runtime.state.KeyGroupRange

所有已实现的接口:

Serializable, Iterable<Integer>, KeyGroupsList

public class KeyGroupRange
extends Object
implements KeyGroupsList, Serializable

This class defines a range of key-group indexes. Key-groups are the granularity into which the keyspace of a job is partitioned for keyed state-handling in state backends. The boundaries of the range are inclusive.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static KeyGroupRange	EMPTY_KEY_GROUP_RANGE The empty key-group

构造器概要

构造器

构造器和说明
KeyGroupRange(int startKeyGroup, int endKeyGroup) Defines the range [startKeyGroup, endKeyGroup]

方法概要

限定符和类型	方法和说明
boolean	contains(int keyGroup) Checks whether or not a single key-group is contained in the range.
boolean	equals(Object o)
int	getEndKeyGroup()
KeyGroupRange	getIntersection(KeyGroupRange other) Create a range that represent the intersection between this range and the given range.
int	getKeyGroupId(int idx) Returns the id of the keygroup at the given index, where index in interval [0, KeyGroupsList.getNumberOfKeyGroups()[.
int	getNumberOfKeyGroups() Returns the number of key group ids in the list.
int	getStartKeyGroup()
int	hashCode()
Iterator<Integer>	iterator()
static KeyGroupRange	of(int startKeyGroup, int endKeyGroup) Factory method that also handles creation of empty key-groups.
String	toString()

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.lang.Iterable

forEach, spliterator

字段详细资料

EMPTY_KEY_GROUP_RANGE

public static final KeyGroupRange EMPTY_KEY_GROUP_RANGE

The empty key-group

构造器详细资料

KeyGroupRange

public KeyGroupRange(int startKeyGroup,
                     int endKeyGroup)

Defines the range [startKeyGroup, endKeyGroup]

参数:

startKeyGroup - start of the range (inclusive)

endKeyGroup - end of the range (inclusive)

方法详细资料

contains

public boolean contains(int keyGroup)

Checks whether or not a single key-group is contained in the range.

指定者:

contains 在接口中 KeyGroupsList

参数:

keyGroup - Key-group to check for inclusion.

返回:

True, only if the key-group is in the range.

getIntersection

public KeyGroupRange getIntersection(KeyGroupRange other)

Create a range that represent the intersection between this range and the given range.

参数:

other - A KeyGroupRange to intersect.

返回:

Key-group range that is the intersection between this and the given key-group range.

getNumberOfKeyGroups

public int getNumberOfKeyGroups()

从接口复制的说明: KeyGroupsList

Returns the number of key group ids in the list.

指定者:

getNumberOfKeyGroups 在接口中 KeyGroupsList

返回:

The number of key-groups in the range

getStartKeyGroup

public int getStartKeyGroup()

返回:

The first key-group in the range.

getEndKeyGroup

public int getEndKeyGroup()

返回:

The last key-group in the range.

getKeyGroupId

public int getKeyGroupId(int idx)

从接口复制的说明: KeyGroupsList

Returns the id of the keygroup at the given index, where index in interval [0, KeyGroupsList.getNumberOfKeyGroups()[.

指定者:

getKeyGroupId 在接口中 KeyGroupsList

参数:

idx - the index into the list

返回:

key group id at the given index

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object

iterator

public Iterator<Integer> iterator()

指定者:

iterator 在接口中 Iterable<Integer>

of

public static KeyGroupRange of(int startKeyGroup,
                               int endKeyGroup)

Factory method that also handles creation of empty key-groups.

参数:

startKeyGroup - start of the range (inclusive)

endKeyGroup - end of the range (inclusive)

返回:

the key-group from start to end or an empty key-group range.