org.apache.pulsar.client.api

枚举 SubscriptionType

java.lang.Object

java.lang.Enum<SubscriptionType>

org.apache.pulsar.client.api.SubscriptionType

所有已实现的接口:

Serializable, Comparable<SubscriptionType>

public enum SubscriptionType
extends Enum<SubscriptionType>

Types of subscription supported by Pulsar

枚举常量概要

枚举常量

枚举常量和说明
Exclusive There can be only 1 consumer on the same topic with the same subscription name.
Failover Multiple consumer will be able to use the same subscription name but only 1 consumer will receive the messages.
Key_Shared Multiple consumer will be able to use the same subscription and all messages with the same key will be dispatched to only one consumer Use ordering_key to overwrite the message key for message ordering.
Shared Multiple consumer will be able to use the same subscription name and the messages will be dispatched according to a round-robin rotation between the connected consumers.

方法概要

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

Exclusive

public static final SubscriptionType Exclusive

There can be only 1 consumer on the same topic with the same subscription name.

Shared

public static final SubscriptionType Shared

Multiple consumer will be able to use the same subscription name and the messages will be dispatched according to a round-robin rotation between the connected consumers.

In this mode, the consumption order is not guaranteed.

Failover

public static final SubscriptionType Failover

Multiple consumer will be able to use the same subscription name but only 1 consumer will receive the messages. If that consumer disconnects, one of the other connected consumers will start receiving messages.

In failover mode, the consumption ordering is guaranteed.

In case of partitioned topics, the ordering is guaranteed on a per-partition basis. The partitions assignments will be split across the available consumers. On each partition, at most one consumer will be active at a given point in time.

Key_Shared

public static final SubscriptionType Key_Shared

Multiple consumer will be able to use the same subscription and all messages with the same key will be dispatched to only one consumer Use ordering_key to overwrite the message key for message ordering.

方法详细资料

values

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