org.apache.hadoop.hbase.client

枚举 Durability

java.lang.Object

java.lang.Enum<Durability>

org.apache.hadoop.hbase.client.Durability

所有已实现的接口:

Serializable, Comparable<Durability>

@InterfaceAudience.Public
public enum Durability
extends Enum<Durability>

Enum describing the durability guarantees for tables and Mutations Note that the items must be sorted in order of increasing durability

枚举常量概要

枚举常量

枚举常量和说明
ASYNC_WAL Write the Mutation to the WAL asynchronously
FSYNC_WAL Write the Mutation to the WAL synchronously and force the entries to disk.
SKIP_WAL Do not write the Mutation to the WAL
SYNC_WAL Write the Mutation to the WAL synchronously.
USE_DEFAULT If this is for tables durability, use HBase's global default value (SYNC_WAL).

方法概要

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

USE_DEFAULT

public static final Durability USE_DEFAULT

If this is for tables durability, use HBase's global default value (SYNC_WAL). Otherwise, if this is for mutation, use the table's default setting to determine durability. This must remain the first option.

SKIP_WAL

public static final Durability SKIP_WAL

Do not write the Mutation to the WAL

ASYNC_WAL

public static final Durability ASYNC_WAL

Write the Mutation to the WAL asynchronously

SYNC_WAL

public static final Durability SYNC_WAL

Write the Mutation to the WAL synchronously. The data is flushed to the filesystem implementation, but not necessarily to disk. For HDFS this will flush the data to the designated number of DataNodes. See HADOOP-6313

FSYNC_WAL

public static final Durability FSYNC_WAL

Write the Mutation to the WAL synchronously and force the entries to disk. See HADOOP-6313

方法详细资料

values

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