| Interface | Description | 
|---|---|
| BackOff | 
 Provide a  
BackOffExecution that indicates the rate at which
 an operation should be retried. | 
| BackOffExecution | 
 Represent a particular back-off execution. 
 | 
| Class | Description | 
|---|---|
| ExponentialBackOff | 
 Implementation of  
BackOff that increases the back off period for each
 retry attempt. | 
| FixedBackOff | 
 A simple  
BackOff implementation that provides a fixed interval
 between two attempts and a maximum number of retries. |