org.apache.pulsar.client.api

枚举 SubscriptionInitialPosition

java.lang.Object

java.lang.Enum<SubscriptionInitialPosition>

org.apache.pulsar.client.api.SubscriptionInitialPosition

所有已实现的接口:

Serializable, Comparable<SubscriptionInitialPosition>

public enum SubscriptionInitialPosition
extends Enum<SubscriptionInitialPosition>

When creating a consumer, if the subscription does not exist, a new subscription will be created. By default the subscription will be created at the end of the topic. See #subscriptionInitialPosition(SubscriptionInitialPosition) to configure the initial position behavior.

枚举常量概要

枚举常量

枚举常量和说明
Earliest the earliest position which means the start consuming position will be the first message
Latest the latest position which means the start consuming position will be the last message

方法概要

限定符和类型	方法和说明
int	getValue()
static SubscriptionInitialPosition	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static SubscriptionInitialPosition[]	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

Latest

public static final SubscriptionInitialPosition Latest

the latest position which means the start consuming position will be the last message

Earliest

public static final SubscriptionInitialPosition Earliest

the earliest position which means the start consuming position will be the first message

方法详细资料

values

public static SubscriptionInitialPosition[] 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 (SubscriptionInitialPosition c : SubscriptionInitialPosition.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 SubscriptionInitialPosition 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

getValue

public final int getValue()