@FunctionalInterface public interface FailureCallback
ListenableFuture.| Modifier and Type | Method and Description | 
|---|---|
| void | onFailure(Throwable ex)Called when the  ListenableFuturecompletes with failure. | 
void onFailure(Throwable ex)
ListenableFuture completes with failure.
 Note that Exceptions raised by this method are ignored.
ex - the failure