CacheableData.CacheStatus (Apache SystemDS 3.2.0-SNAPSHOT API)

java.lang.Object
- java.lang.Enum<CacheableData.CacheStatus>
- - org.apache.sysds.runtime.controlprogram.caching.CacheableData.CacheStatus

All Implemented Interfaces:

Serializable, Comparable<CacheableData.CacheStatus>

Enclosing class:

CacheableData<T extends CacheBlock<?>>
```
public static enum CacheableData.CacheStatus
extends Enum<CacheableData.CacheStatus>
```
Defines all possible cache status types for a data blob. An object of class CacheableData can be in one of the following five status types: EMPTY: Either there is no data blob at all, or the data blob resides in a specified import file and has never been downloaded yet. READ: The data blob is in main memory; one or more threads are referencing and reading it (shared "read-only" lock). This status uses a counter. Eviction is NOT allowed. MODIFY: The data blob is in main memory; exactly one thread is referencing and modifying it (exclusive "write" lock). Eviction is NOT allowed. CACHED: The data blob is in main memory, and nobody is using nor referencing it. There is always an persistent recovery object for it

Enum Constant Summary

Enum Constants
Enum Constant Description

CACHED

CACHED_NOWRITE

EMPTY

MODIFY

READ

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static CacheableData.CacheStatus`	`valueOf(String name)`	Returns the enum constant of this type with the specified name.
`static CacheableData.CacheStatus[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

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

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

- Enum Constant Detail
  - EMPTY
```
public static final CacheableData.CacheStatus EMPTY
```
  - READ
```
public static final CacheableData.CacheStatus READ
```
  - MODIFY
```
public static final CacheableData.CacheStatus MODIFY
```
  - CACHED
```
public static final CacheableData.CacheStatus CACHED
```
  - CACHED_NOWRITE
```
public static final CacheableData.CacheStatus CACHED_NOWRITE
```
- Method Detail
  - values
```
public static CacheableData.CacheStatus[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
    for (CacheableData.CacheStatus c : CacheableData.CacheStatus.values()) System.out.println(c);
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static CacheableData.CacheStatus valueOf(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:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null