StateChangeOperation (Flink : State backends : Changelog 1.14.5 API)

java.lang.Object
- java.lang.Enum<StateChangeOperation>
- - org.apache.flink.state.changelog.StateChangeOperation

所有已实现的接口:

Serializable, Comparable<StateChangeOperation>
```
@Internal
public enum StateChangeOperation
extends Enum<StateChangeOperation>
```
The operation applied to ChangelogState.

枚举常量概要

枚举常量
枚举常量和说明
`ADD` Scope: key + namespace.
`ADD_ELEMENT` Scope: key + namespace + element (e.g. user list append).
`ADD_OR_UPDATE_ELEMENT` Scope: key + namespace + element (e.g. user map key put).
`CLEAR` Scope: key + namespace.
`MERGE_NS` Scope: key + namespace, also affecting other (source) namespaces.
`METADATA` State metadata (name, serializers, etc.).
`REMOVE_ELEMENT` Scope: key + namespace + element (e.g. user map remove or iterator remove).
`REMOVE_FIRST_ELEMENT` Scope: key + namespace, first element (e.g. priority queue poll).
`SET` Scope: key + namespace.
`SET_INTERNAL` Scope: key + namespace.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`static StateChangeOperation`	`byCode(byte opCode)`
`byte`	`getCode()`
`static StateChangeOperation`	`valueOf(String name)` 返回带有指定名称的该类型的枚举常量。
`static StateChangeOperation[]`	`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
  - CLEAR
```
public static final StateChangeOperation CLEAR
```
    Scope: key + namespace.
  - SET
```
public static final StateChangeOperation SET
```
    Scope: key + namespace.
  - SET_INTERNAL
```
public static final StateChangeOperation SET_INTERNAL
```
    Scope: key + namespace.
  - ADD
```
public static final StateChangeOperation ADD
```
    Scope: key + namespace.
  - MERGE_NS
```
public static final StateChangeOperation MERGE_NS
```
    Scope: key + namespace, also affecting other (source) namespaces.
  - ADD_ELEMENT
```
public static final StateChangeOperation ADD_ELEMENT
```
    Scope: key + namespace + element (e.g. user list append).
  - ADD_OR_UPDATE_ELEMENT
```
public static final StateChangeOperation ADD_OR_UPDATE_ELEMENT
```
    Scope: key + namespace + element (e.g. user map key put).
  - REMOVE_ELEMENT
```
public static final StateChangeOperation REMOVE_ELEMENT
```
    Scope: key + namespace + element (e.g. user map remove or iterator remove).
  - REMOVE_FIRST_ELEMENT
```
public static final StateChangeOperation REMOVE_FIRST_ELEMENT
```
    Scope: key + namespace, first element (e.g. priority queue poll).
  - METADATA
```
public static final StateChangeOperation METADATA
```
    State metadata (name, serializers, etc.).
- 方法详细资料
  - values
```
public static StateChangeOperation[] 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 (StateChangeOperation c : StateChangeOperation.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 StateChangeOperation 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
  - byCode
```
public static StateChangeOperation byCode(byte opCode)
```
  - getCode
```
public byte getCode()
```

枚举 StateChangeOperation

枚举常量概要

方法概要

从类继承的方法 java.lang.Enum

从类继承的方法 java.lang.Object

枚举常量详细资料

CLEAR

SET

SET_INTERNAL

ADD

MERGE_NS

ADD_ELEMENT

ADD_OR_UPDATE_ELEMENT

REMOVE_ELEMENT

REMOVE_FIRST_ELEMENT

METADATA

方法详细资料

values

valueOf

byCode

getCode