NullCache (Alfresco Repository zap-7.87-postgres11 API)

java.lang.Object
- org.alfresco.repo.cache.NullCache<K,V>

All Implemented Interfaces:

org.alfresco.repo.cache.SimpleCache<K,V>
```
public class NullCache<K extends java.io.Serializable,V>
extends java.lang.Object
implements org.alfresco.repo.cache.SimpleCache<K,V>
```
A cache that does nothing - always.
There are conditions under which code that expects to be caching, should not be. Using this cache, it becomes possible to configure a valid cache in whilst still ensuring that the actual caching is not performed.

Author:

Derek Hulley

Constructor Summary

Constructors
Constructor Description

NullCache()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	NO-OP
`boolean`	`contains(K key)`	NO-OP
`V`	`get(K key)`	NO-OP
`static <K extends java.io.Serializable,V> NullCache<K,V>`	`getInstance()`
`java.util.Collection<K>`	`getKeys()`
`void`	`put(K key, V value)`	NO-OP
`void`	`remove(K key)`	NO-OP

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NullCache
```
public NullCache()
```
- Method Detail
  - getInstance
```
public static final <K extends java.io.Serializable,V> NullCache<K,V> getInstance()
```
    Returns:
    
    Returns a singleton that can be used in any way - all operations are stateless
  - contains
```
public boolean contains(K key)
```
    NO-OP
    
    Specified by:
    
    contains in interface org.alfresco.repo.cache.SimpleCache<K extends java.io.Serializable,V>
  - getKeys
```
public java.util.Collection<K> getKeys()
```
    Specified by:
    
    getKeys in interface org.alfresco.repo.cache.SimpleCache<K extends java.io.Serializable,V>
  - get
```
public V get(K key)
```
    NO-OP
    
    Specified by:
    
    get in interface org.alfresco.repo.cache.SimpleCache<K extends java.io.Serializable,V>
  - put
```
public void put(K key,
                V value)
```
    NO-OP
    
    Specified by:
    
    put in interface org.alfresco.repo.cache.SimpleCache<K extends java.io.Serializable,V>
  - remove
```
public void remove(K key)
```
    NO-OP
    
    Specified by:
    
    remove in interface org.alfresco.repo.cache.SimpleCache<K extends java.io.Serializable,V>
  - clear
```
public void clear()
```
    NO-OP
    
    Specified by:
    
    clear in interface org.alfresco.repo.cache.SimpleCache<K extends java.io.Serializable,V>