Class AsyncResult<V>

java.lang.Object
com.codename1.backend.AsyncResult<V>
All Implemented Interfaces:
Future<V>
public final class AsyncResult<V> extends Object implements Future<V>

A Future that is already complete: what an @Async method returns from its body.

@Async
  public Future build(String month) {
      return AsyncResult.of(compute(month));
  }

The caller never sees this object. It receives the Future of the call itself at once, which completes with this value when the body has run -- the same arrangement as Spring's AsyncResult and CompletableFuture.completedFuture.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    cancel(boolean mayInterruptIfRunning)
    Stops the work if it has not started.
    static <V> AsyncResult<V>
    failed(Throwable failure)
    A result that failed with failure, for a body that reports rather than throws.
    V
    get()
    Waits for the work to finish and returns its result.
    V
    get(long timeout, TimeUnit unit)
    Waits up to timeout for the work to finish and returns its result.
    boolean
    isCancelled()
    Whether Future.cancel(boolean) cancelled the work before it ran.
    boolean
    isDone()
    Whether the work has finished: completed, failed or cancelled.
    static <V> AsyncResult<V>
    of(V value)
    A result holding value.

    Methods inherited from class Object

    clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • of

      public static <V> AsyncResult<V> of(V value)
      A result holding value.

    • failed

      public static <V> AsyncResult<V> failed(Throwable failure)
      A result that failed with failure, for a body that reports rather than throws.

    • cancel

      public boolean cancel(boolean mayInterruptIfRunning)
      Description copied from interface: Future
      Stops the work if it has not started. Answers whether it was cancelled; work already running is not interrupted by the backend's executors.
      Specified by:
      cancel in interface Future<V>
      Parameters:
      mayInterruptIfRunning - whether a running task may be interrupted
      Returns:
      true when this call cancelled it

    • isCancelled

      public boolean isCancelled()
      Description copied from interface: Future
      Whether Future.cancel(boolean) cancelled the work before it ran.
      Specified by:
      isCancelled in interface Future<V>
      Returns:
      true when cancelled

    • isDone

      public boolean isDone()
      Description copied from interface: Future
      Whether the work has finished: completed, failed or cancelled.
      Specified by:
      isDone in interface Future<V>
      Returns:
      true once it will not change again

    • get

      public V get() throws ExecutionException
      Description copied from interface: Future
      Waits for the work to finish and returns its result.
      Specified by:
      get in interface Future<V>
      Returns:
      the result
      Throws:
      ExecutionException - when the work threw; Throwable.getCause() is what it threw

    • get

      public V get(long timeout, TimeUnit unit) throws ExecutionException
      Description copied from interface: Future
      Waits up to timeout for the work to finish and returns its result.
      Specified by:
      get in interface Future<V>
      Parameters:
      timeout - how long to wait, in unit
      unit - the unit of timeout
      Returns:
      the result
      Throws:
      ExecutionException - when the work threw