org.apache.flink.runtime.operators

枚举 DamBehavior

java.lang.Object

java.lang.Enum<DamBehavior>

org.apache.flink.runtime.operators.DamBehavior

所有已实现的接口:

Serializable, Comparable<DamBehavior>

public enum DamBehavior
extends Enum<DamBehavior>

Enumeration for the different dam behaviors of an algorithm or a driver strategy. The dam behavior describes whether records pass through the algorithm (no dam), whether all records are collected before the first is returned (full dam) or whether a certain large amount is collected before the algorithm returns records.

枚举常量概要

枚举常量

枚举常量和说明
FULL_DAM Constant indicating that the algorithm collects all records before returning any.
MATERIALIZING Constant indicating that the algorithm materialized (some) records, but may return records before all records are read.
PIPELINED Constant indicating that the algorithm does not come with any form of dam and records pass through in a pipelined fashion.

方法概要

限定符和类型	方法和说明
boolean	isMaterializing() Checks whether this enumeration represents some form of materialization, either with a full dam or without.
static DamBehavior	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static DamBehavior[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

PIPELINED

public static final DamBehavior PIPELINED

Constant indicating that the algorithm does not come with any form of dam and records pass through in a pipelined fashion.

MATERIALIZING

public static final DamBehavior MATERIALIZING

Constant indicating that the algorithm materialized (some) records, but may return records before all records are read.

FULL_DAM

public static final DamBehavior FULL_DAM

Constant indicating that the algorithm collects all records before returning any.

方法详细资料

values

public static DamBehavior[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (DamBehavior c : DamBehavior.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static DamBehavior valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

isMaterializing

public boolean isMaterializing()

Checks whether this enumeration represents some form of materialization, either with a full dam or without.

返回:

True, if this enumeration constant represents a materializing behavior, false otherwise.