程序包 org.apache.pulsar.common.policies.data

枚举 BacklogQuota.RetentionPolicy

java.lang.Object

java.lang.Enum<BacklogQuota.RetentionPolicy>

org.apache.pulsar.common.policies.data.BacklogQuota.RetentionPolicy

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<BacklogQuota.RetentionPolicy>

封闭接口:

BacklogQuota

public static enum BacklogQuota.RetentionPolicy
extends java.lang.Enum<BacklogQuota.RetentionPolicy>

Enumeration type determines how to retain backlog against the resource shortages.

枚举常量概要

枚举常量

枚举常量	说明
consumer_backlog_eviction	Policy which evicts the oldest message from the slowest consumer's backlog.
producer_exception	Policy which throws javax.jms.ResourceAllocationException to the producer.
producer_request_hold	Policy which holds producer's send request until the resource becomes available (or holding times out).

方法概要

修饰符和类型	方法	说明
static BacklogQuota.RetentionPolicy	valueOf(java.lang.String name)	返回带有指定名称的该类型的枚举常量。
static BacklogQuota.RetentionPolicy[]	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

producer_request_hold

public static final BacklogQuota.RetentionPolicy producer_request_hold

Policy which holds producer's send request until the resource becomes available (or holding times out).

producer_exception

public static final BacklogQuota.RetentionPolicy producer_exception

Policy which throws javax.jms.ResourceAllocationException to the producer.

consumer_backlog_eviction

public static final BacklogQuota.RetentionPolicy consumer_backlog_eviction

Policy which evicts the oldest message from the slowest consumer's backlog.

方法详细资料

values

public static BacklogQuota.RetentionPolicy[] 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 (BacklogQuota.RetentionPolicy c : BacklogQuota.RetentionPolicy.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 BacklogQuota.RetentionPolicy valueOf(java.lang.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:

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

java.lang.NullPointerException - 如果参数为空值