Expand description
A service combinator that sends requests to a first service, then retries processing on a second fallback service if the first service errors, or if a custom fallback policy selects the fallback service.
Fallback designs have a number of downsides but may be useful
in some cases. For instance, when using batch verification, the Fallback
wrapper can be used to fall back to individual verification of each item when
a batch fails to verify.
TODO: compare with similar code in linkerd.
Modules§
- future
- Future types for the
Fallbackmiddleware.
Structs§
- Fallback
- Provides fallback processing on a second service if its fallback policy selects it.
- OnError
- The default fallback policy.
Traits§
- Fallback
Policy - Decides if a
Fallbackservice should call its fallback service.
Type Aliases§
- Boxed
Error - A boxed type-erased
std::error::Errorthat can be sent between threads.