| Interface | Description | 
|---|---|
| Continuation | Represents transport-neutral suspended invocation instances
 or continuations | 
| ContinuationCallback | Callback that receives continuation status updates. | 
| ContinuationProvider | Provides transport-neutral support for creating suspended invocation primitives
 or continuations | 
| Exception | Description | 
|---|---|
| SuspendedInvocationException | Represents transport-specific exceptions which are used to indicate that
 a given invocation was suspended | 
Apache CXF