Promise (Jetty :: Utilities 9.4.14.v20181114 API)

Type Parameters:

C - the type of the context object

All Known Implementing Classes:

FuturePromise, Promise.Adapter, Promise.Completable, Promise.Wrapper
```
public interface Promise<C>
```
A callback abstraction that handles completed/failed events of asynchronous operations.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static class`	`Promise.Adapter<U>`	Empty implementation of `Promise`.
`static class`	`Promise.Completable<S>`	A CompletableFuture that is also a Promise.
`static class`	`Promise.Wrapper<W>`

Method Summary

All Methods Static Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`failed(Throwable x)`	Callback invoked when the operation fails.
`static <T> Promise<T>`	`from(CompletableFuture<? super T> completable)`	Creates a promise from the given incomplete CompletableFuture.
`default void`	`succeeded(C result)`	Callback invoked when the operation completes.

- Method Detail
  - succeeded
```
default void succeeded(C result)
```
    Callback invoked when the operation completes.
    
    Parameters:
    
    result - the context
    
    See Also:
    
    failed(Throwable)
  - failed
```
default void failed(Throwable x)
```
    Callback invoked when the operation fails.
    
    Parameters:
    
    x - the reason for the operation failure
  - from
```
static <T> Promise<T> from(CompletableFuture<? super T> completable)
```
    Creates a promise from the given incomplete CompletableFuture.
    
    When the promise completes, either succeeding or failing, the CompletableFuture is also completed, respectively via CompletableFuture.complete(Object) or CompletableFuture.completeExceptionally(Throwable).
    
    Type Parameters:
    
    T - the type of the result
    
    Parameters:
    
    completable - the CompletableFuture to convert into a promise
    
    Returns:
    
    a promise that when completed, completes the given CompletableFuture