Fallback (Apache jclouds 1.7.3 API)

Type Parameters:
V - the result type of the backup value

All Superinterfaces:

com.google.common.util.concurrent.FutureFallback<V>

All Known Implementing Classes:

AzureBlobFallbacks.FalseIfContainerAlreadyExists, BlobStoreFallbacks.FalseOnContainerNotFound, BlobStoreFallbacks.FalseOnKeyNotFound, BlobStoreFallbacks.NullOnContainerNotFound, BlobStoreFallbacks.NullOnKeyAlreadyExists, BlobStoreFallbacks.NullOnKeyNotFound, BlobStoreFallbacks.ThrowContainerNotFoundOn404, BlobStoreFallbacks.ThrowKeyNotFoundOn404, CloudStackFallbacks.VoidOnNotFoundOr404OrUnableToFindAccountOwner, DynECTFallbacks.FalseOn400, EC2Fallbacks.VoidOnVolumeAvailable, EndpointIfAlreadyExists, Fallbacks.AbsentOn403Or404Or500, Fallbacks.EmptyFluentIterableOnNotFoundOr404, Fallbacks.EmptyIterableWithMarkerOnNotFoundOr404, Fallbacks.EmptyListOnNotFoundOr404, Fallbacks.EmptyMapOnNotFoundOr404, Fallbacks.EmptyMultimapOnNotFoundOr404, Fallbacks.EmptyPagedIterableOnNotFoundOr404, Fallbacks.EmptySetOnNotFoundOr404, Fallbacks.FalseOnNotFoundOr404, Fallbacks.FalseOnNotFoundOr422, Fallbacks.NullOnNotFoundOr404, Fallbacks.TrueOnNotFoundOr404, Fallbacks.VoidOnNotFoundOr404, FalseIfBucketAlreadyOwnedByYouOrOperationAbortedWhenBucketExists, KeystoneFallbacks.EmptyPaginatedCollectionOnNotFoundOr404, MapHttp4xxCodesToExceptions, S3Fallbacks.TrueOn404OrNotFoundFalseOnIllegalState, SwiftFallbacks.TrueOn404FalseOn409
```
@Beta
public interface Fallback<V>
extends com.google.common.util.concurrent.FutureFallback<V>
```
Provides a backup value to replace an earlier exception.

Since:

1.6

Author:

Adrian Cole

See Also:
FutureFallback

Method Summary

Methods
Modifier and Type	Method and Description
`V`	`createOrPropagate(Throwable t)` The exception is provided so that the `Fallback` implementation can conditionally determine whether to propagate the exception or to attempt to recover.

Methods inherited from interface com.google.common.util.concurrent.FutureFallback
create

- Method Detail
  - createOrPropagate
```
V createOrPropagate(Throwable t)
                    throws Exception
```
    The exception is provided so that the Fallback implementation can conditionally determine whether to propagate the exception or to attempt to recover.
    
    Parameters:
    t - the exception that made the call fail.
    
    Throws:
    
    Exception

Interface Fallback<V>

Method Summary

Methods inherited from interface com.google.common.util.concurrent.FutureFallback

Method Detail

createOrPropagate