Fallback (Failsafe 3.3.1-SNAPSHOT API)

Type Parameters:

R - result type

All Superinterfaces:

Policy<R>
```
public interface Fallback<R>
extends Policy<R>
```
A Policy that handles failures using a fallback function or result.
This class is threadsafe.

See Also:

TimeoutConfig, FallbackBuilder

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`static <R> FallbackBuilder<R>`	`builder(CheckedConsumer<ExecutionAttemptedEvent<? extends R>> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> FallbackBuilder<R>`	`builder(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends R> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> FallbackBuilder<R>`	`builder(CheckedRunnable fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> FallbackBuilder<R>`	`builder(CheckedSupplier<? extends R> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> FallbackBuilder<R>`	`builder(FallbackConfig<R> config)` Creates a new FallbackBuilder that will be based on the `config`.
`static <R> FallbackBuilder<R>`	`builder(R fallbackResult)` Returns the `fallbackResult` to be provided if execution fails.
`static <R> FallbackBuilder<R>`	`builderOfException(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends Exception> fallback)` Returns the `fallback` to be executed if execution fails and allows an alternative exception to be supplied instead.
`static <R> FallbackBuilder<R>`	`builderOfStage(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends CompletionStage<R>> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> FallbackBuilder<R>`	`builderOfStage(CheckedSupplier<? extends CompletionStage<R>> fallback)` Returns the `fallback` to be executed if execution fails.
`FallbackConfig<R>`	`getConfig()` Returns the `FallbackConfig` that the Fallback was built with.
`static Fallback<Void>`	`none()` Returns a fallback that will return a null if execution fails.
`static <R> Fallback<R>`	`of(CheckedConsumer<ExecutionAttemptedEvent<? extends R>> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> Fallback<R>`	`of(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends R> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> Fallback<R>`	`of(CheckedRunnable fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> Fallback<R>`	`of(CheckedSupplier<? extends R> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> Fallback<R>`	`of(R fallbackResult)` Returns the `fallbackResult` to be provided if execution fails.
`static <R> Fallback<R>`	`ofException(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends Exception> fallback)` Returns the `fallback` to be executed if execution fails and allows an alternative exception to be supplied instead.
`static <R> Fallback<R>`	`ofStage(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends CompletionStage<R>> fallback)` Returns the `fallback` to be executed if execution fails.
`static <R> Fallback<R>`	`ofStage(CheckedSupplier<? extends CompletionStage<R>> fallback)` Returns the `fallback` to be executed if execution fails.

Methods inherited from interface dev.failsafe.Policy
toExecutor

- Method Detail
  - builder
```
static <R> FallbackBuilder<R> builder(FallbackConfig<R> config)
```
    Creates a new FallbackBuilder that will be based on the config.
  - builder
```
static <R> FallbackBuilder<R> builder(CheckedRunnable fallback)
```
    Returns the fallback to be executed if execution fails.
    
    Throws:
    
    NullPointerException - if fallback is null
  - builder
```
static <R> FallbackBuilder<R> builder(CheckedSupplier<? extends R> fallback)
```
    Returns the fallback to be executed if execution fails.
    
    Throws:
    
    NullPointerException - if fallback is null
  - builder
```
static <R> FallbackBuilder<R> builder(CheckedConsumer<ExecutionAttemptedEvent<? extends R>> fallback)
```
    Returns the fallback to be executed if execution fails. The fallback accepts an ExecutionAttemptedEvent.
    
    Throws:
    
    NullPointerException - if fallback is null
  - builder
```
static <R> FallbackBuilder<R> builder(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends R> fallback)
```
    Returns the fallback to be executed if execution fails. The fallback applies an ExecutionAttemptedEvent.
    
    Throws:
    
    NullPointerException - if fallback is null
  - builder
```
static <R> FallbackBuilder<R> builder(R fallbackResult)
```
    Returns the fallbackResult to be provided if execution fails.
  - builderOfException
```
static <R> FallbackBuilder<R> builderOfException(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends Exception> fallback)
```
    Returns the fallback to be executed if execution fails and allows an alternative exception to be supplied instead. The fallback applies an ExecutionAttemptedEvent and must return an exception.
    
    Throws:
    
    NullPointerException - if fallback is null
  - builderOfStage
```
static <R> FallbackBuilder<R> builderOfStage(CheckedSupplier<? extends CompletionStage<R>> fallback)
```
    Returns the fallback to be executed if execution fails.
    
    Throws:
    
    NullPointerException - if fallback is null
  - builderOfStage
```
static <R> FallbackBuilder<R> builderOfStage(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends CompletionStage<R>> fallback)
```
    Returns the fallback to be executed if execution fails. The fallback accepts an ExecutionAttemptedEvent.
    
    Throws:
    
    NullPointerException - if fallback is null
  - of
```
static <R> Fallback<R> of(CheckedRunnable fallback)
```
    Returns the fallback to be executed if execution fails.
    
    Throws:
    
    NullPointerException - if fallback is null
  - of
```
static <R> Fallback<R> of(CheckedSupplier<? extends R> fallback)
```
    Returns the fallback to be executed if execution fails.
    
    Throws:
    
    NullPointerException - if fallback is null
  - of
```
static <R> Fallback<R> of(CheckedConsumer<ExecutionAttemptedEvent<? extends R>> fallback)
```
    Returns the fallback to be executed if execution fails. The fallback accepts an ExecutionAttemptedEvent.
    
    Throws:
    
    NullPointerException - if fallback is null
  - of
```
static <R> Fallback<R> of(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends R> fallback)
```
    Returns the fallback to be executed if execution fails. The fallback applies an ExecutionAttemptedEvent.
    
    Throws:
    
    NullPointerException - if fallback is null
  - ofException
```
static <R> Fallback<R> ofException(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends Exception> fallback)
```
    Returns the fallback to be executed if execution fails and allows an alternative exception to be supplied instead. The fallback applies an ExecutionAttemptedEvent and must return an exception.
    
    Throws:
    
    NullPointerException - if fallback is null
  - of
```
static <R> Fallback<R> of(R fallbackResult)
```
    Returns the fallbackResult to be provided if execution fails.
  - ofStage
```
static <R> Fallback<R> ofStage(CheckedSupplier<? extends CompletionStage<R>> fallback)
```
    Returns the fallback to be executed if execution fails.
    
    Throws:
    
    NullPointerException - if fallback is null
  - ofStage
```
static <R> Fallback<R> ofStage(CheckedFunction<ExecutionAttemptedEvent<? extends R>,? extends CompletionStage<R>> fallback)
```
    Returns the fallback to be executed if execution fails. The fallback accepts an ExecutionAttemptedEvent.
    
    Throws:
    
    NullPointerException - if fallback is null
  - none
```
static Fallback<Void> none()
```
    Returns a fallback that will return a null if execution fails.
  - getConfig
```
FallbackConfig<R> getConfig()
```
    Returns the FallbackConfig that the Fallback was built with.
    
    Specified by:
    
    getConfig in interface Policy<R>

Interface Fallback<R>

Method Summary

Methods inherited from interface dev.failsafe.Policy

Method Detail

builder

builder

builder

builder

builder

builder

builderOfException

builderOfStage

builderOfStage

of

of

of

of

ofException

of

ofStage

ofStage

none

getConfig