CustomBackoffStrategy (SmallRye Fault Tolerance: API 6.2.2 API)

```
@Experimental("first attempt at providing additional retry backoff strategies")
public interface CustomBackoffStrategy
```
For each invocation of a method annotated @Retry and @CustomBackoff, an instance of custom backoff strategy is created and used for computing delays between individual retry attempts. Therefore, implementations of this interface must have a public zero-parameter constructor and should generally be cheap to construct and not use a lot of memory. Additionally, they may be used from multiple threads, so they must be thread safe.

See Also:

init(long), nextDelayInMillis(Throwable), CustomBackoff

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default void`	`init(long initialDelayInMillis)`	Called once, after instantiation.
`long`	`nextDelayInMillis(Throwable exception)`	Called to compute a delay before each retry attempt, including before the first retry.

- Method Detail
  - init
```
default void init(long initialDelayInMillis)
```
    Called once, after instantiation. Can be used to initialize state, if needed. Implementations are free to use initialDelayInMillis as they see fit; possibly even ignore, if the concept of initial delay doesn't make sense for the strategy.
    
    Parameters:
    
    initialDelayInMillis - initial delay in milliseconds, per Retry.delay and Retry.delayUnit
  - nextDelayInMillis
```
long nextDelayInMillis(Throwable exception)
```
    Called to compute a delay before each retry attempt, including before the first retry. Implementations must be fast and non-blocking (i.e., they must not do any IO or long-running computations).
    
    Parameters:
    
    exception - exception that caused the retry attempt
    
    Returns:
    
    delay in milliseconds; must be >= 0