Backend API. Server-side code: this runs in a Codename One backend, not in the app on the device.

public interface Future<V>

The result of work that finishes later – on the backend, what an @Async method returns, completed when its body has run on its executor.

Methods

`public abstract boolean cancel(boolean mayInterruptIfRunning)`	Stops the work if it has not started.
`public abstract boolean isCancelled()`	Whether `cancel` cancelled the work before it ran.
`public abstract boolean isDone()`	Whether the work has finished: completed, failed or cancelled.
`public abstract V get() throwsInterruptedException, ExecutionException`	Waits for the work to finish and returns its result.
`public abstract V get(long timeout,` `TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException`	Waits up to `timeout` for the work to finish and returns its result.

public abstract boolean cancel(boolean mayInterruptIfRunning)

Stops the work if it has not started. Answers whether it was cancelled; work already running is not interrupted by the backend’s executors.

true when this call cancelled it

public abstract boolean isCancelled()

Whether cancel cancelled the work before it ran.

true when cancelled

public abstract boolean isDone()

Whether the work has finished: completed, failed or cancelled.

true once it will not change again

public abstract V get()
throws InterruptedException, ExecutionException

Waits for the work to finish and returns its result.

the result

InterruptedException: when the waiting thread is interrupted
ExecutionException: when the work threw; Throwable.getCause is what it threw
CancellationException: when the work was cancelled

public abstract V get(long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException, TimeoutException

Waits up to timeout for the work to finish and returns its result.

the result