public class SettableListenableFuture<T> extends Object implements ListenableFuture<T>
ListenableFuture whose value can be set via set(Object)
or setException(Throwable). It may also get cancelled.
Inspired by com.google.common.util.concurrent.SettableFuture.
| Constructor and Description |
|---|
SettableListenableFuture() |
| Modifier and Type | Method and Description |
|---|---|
void |
addCallback(ListenableFutureCallback<? super T> callback)
Register the given
ListenableFutureCallback. |
void |
addCallback(SuccessCallback<? super T> successCallback,
FailureCallback failureCallback)
Java 8 lambda-friendly alternative with success and failure callbacks.
|
boolean |
cancel(boolean mayInterruptIfRunning) |
T |
get()
Retrieve the value.
|
T |
get(long timeout,
TimeUnit unit)
Retrieve the value.
|
protected void |
interruptTask()
Subclasses can override this method to implement interruption of the future's
computation.
|
boolean |
isCancelled() |
boolean |
isDone() |
boolean |
set(T value)
Set the value of this future.
|
boolean |
setException(Throwable exception)
Set the exception of this future.
|
public boolean set(T value)
true if the
value was set successfully, or false if the future has already been
set or cancelled.value - the value that will be settrue if the value was successfully set, else falsepublic boolean setException(Throwable exception)
true if the
exception was set successfully, or false if the future has already been
set or cancelled.exception - the value that will be settrue if the exception was successfully set, else falsepublic void addCallback(ListenableFutureCallback<? super T> callback)
ListenableFutureListenableFutureCallback.addCallback in interface ListenableFuture<T>callback - the callback to registerpublic void addCallback(SuccessCallback<? super T> successCallback, FailureCallback failureCallback)
ListenableFutureaddCallback in interface ListenableFuture<T>successCallback - the success callbackfailureCallback - the failure callbackpublic boolean cancel(boolean mayInterruptIfRunning)
public boolean isCancelled()
isCancelled in interface Future<T>public T get() throws InterruptedException, ExecutionException
This method returns the value if it has been set via set(Object),
throws an ExecutionException if an exception has
been set via setException(Throwable), or throws a
CancellationException if the future has been cancelled.
get in interface Future<T>InterruptedExceptionExecutionExceptionpublic T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException
This method returns the value if it has been set via set(Object),
throws an ExecutionException if an exception has
been set via setException(Throwable), or throws a
CancellationException if the future has been cancelled.
get in interface Future<T>timeout - the maximum time to waitunit - the unit of the timeout argumentInterruptedExceptionExecutionExceptionTimeoutExceptionprotected void interruptTask()
cancel(true).
The default implementation is empty.