Cache (Vert.x Stack - Docs 5.0.0.CR4 API)

```
@Unstable
public interface Cache
```
Cache SPI.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Future<Resource>`	`get(String key)`	Being called when the proxy attempts to fetch a cache item.
`Future<Void>`	`put(String key, Resource value)`	Being called when the proxy attempts to add a new cache item.
`Future<Void>`	`remove(String key)`	Being called when the proxy attempts to delete a cache item, typically caused by invalidating an existing item.

- Method Detail
  - put
```
Future<Void> put(String key,
                 Resource value)
```
    Being called when the proxy attempts to add a new cache item. The cache can only store up to maxSize of the latest items based on CacheOptions.
    
    Parameters:
    
    key - the URI of the resource
    
    value - the cached response
    
    Returns:
    
    a succeed void future
  - get
```
Future<Resource> get(String key)
```
    Being called when the proxy attempts to fetch a cache item.
    
    Parameters:
    
    key - the URI of the resource
    
    Returns:
    
    the cached response, null if not exist, should all wrap with future
  - remove
```
Future<Void> remove(String key)
```
    Being called when the proxy attempts to delete a cache item, typically caused by invalidating an existing item. Do nothing if not exist.
    
    Parameters:
    
    key - the URI of the resource
    
    Returns:
    
    a succeed void future