KeyResolver (rate-limit 2.1.30 API)

All Known Implementing Classes:

AkamaiAddressKeyResolver, JwtClientIdKeyResolver, JwtHeaderClientIdKeyResolver, JwtUserIdKeyResolver, RemoteAddressKeyResolver
```
public interface KeyResolver
```
When rate limit is used, we need to define a key to identify a unique client or a unique IP address. The information can be from different places in the exchange, and we might need to combine several strategies to get a unique key.

Author:

Steve Hu

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  String resolve(io.undertow.server.HttpServerExchange exchange)
  Resolve a unique key from the exchange

- Method Detail
  - resolve
```
String resolve(io.undertow.server.HttpServerExchange exchange)
```
    Resolve a unique key from the exchange
    
    Parameters:
    
    exchange - server exchange
    
    Returns:
    
    A string for the key