Fallback (Helidon Project 2.6.9 API)

Type Parameters:

T - type of the values returned

All Superinterfaces:

FtHandlerTyped<T>
```
public interface Fallback<T>
extends FtHandlerTyped<T>
```
Fallback allows the user to execute an alternative function in case the provided supplier fails.
In case you call the FtHandlerTyped.invokeMulti(java.util.function.Supplier) method, the following restriction applies:
- In case at least one record was sent (one onNext was called), the fallback will not trigger.
You may provide fallback for both a Multi and a Single. If none is provided, the method is executed without fallback.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class Fallback.Builder<T>
Fluent API builder for Fallback.

Method Summary

Static Methods
Modifier and Type	Method	Description
`static <T> Fallback.Builder<T>`	`builder()`	A builder to customize `Fallback`.
`static <T> Fallback<T>`	`create(Function<Throwable,? extends CompletionStage<T>> fallback)`	Create a fallback for a `Single` or `CompletionStage`.
`static <T> Fallback<T>`	`createMulti(Function<Throwable,? extends Flow.Publisher<T>> fallback)`	Create a fallback for a `Multi` or `Flow.Publisher`.

Methods inherited from interface io.helidon.faulttolerance.FtHandlerTyped
invoke, invokeMulti

- Method Detail
  - builder
```
static <T> Fallback.Builder<T> builder()
```
    A builder to customize Fallback.
    
    Type Parameters:
    
    T - type of the values returned by the failing method
    
    Returns:
    
    a new builder
  - create
```
static <T> Fallback<T> create(Function<Throwable,? extends CompletionStage<T>> fallback)
```
    Create a fallback for a Single or CompletionStage.
    
    Type Parameters:
    
    T - type of the result
    
    Parameters:
    
    fallback - fallback supplier to obtain the alternative result
    
    Returns:
    
    a new fallback
  - createMulti
```
static <T> Fallback<T> createMulti(Function<Throwable,? extends Flow.Publisher<T>> fallback)
```
    Create a fallback for a Multi or Flow.Publisher.
    
    Type Parameters:
    
    T - type of the result
    
    Parameters:
    
    fallback - fallback supplier to obtain the alternative result
    
    Returns:
    
    a new fallback