Engine.HistorySource (server 7.5.2 API)

java.lang.Object
- java.lang.Enum<Engine.HistorySource>
- - org.elasticsearch.index.engine.Engine.HistorySource

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<Engine.HistorySource>, java.lang.constant.Constable

Enclosing class:

Engine
```
public static enum Engine.HistorySource
extends java.lang.Enum<Engine.HistorySource>
```
Whether we should read history operations from translog or Lucene index

Nested Class Summary
- Nested classes/interfaces inherited from class java.lang.Enum
  java.lang.Enum.EnumDesc<E extends java.lang.Enum<E>>

Enum Constant Summary

Enum Constants
Enum Constant Description

INDEX

TRANSLOG

Method Summary

Modifier and Type	Method	Description
`static Engine.HistorySource`	`valueOf(java.lang.String name)`	Returns the enum constant of this type with the specified name.
`static Engine.HistorySource[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - TRANSLOG
```
public static final Engine.HistorySource TRANSLOG
```
  - INDEX
```
public static final Engine.HistorySource INDEX
```
- Method Detail
  - values
```
public static Engine.HistorySource[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared.
    
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static Engine.HistorySource valueOf(java.lang.String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
    
    java.lang.NullPointerException - if the argument is null