AccountManagerFuturepublic interface AccountManagerFuture | A AccountManagerFuture represents the result of an asynchronous
{@link AccountManager} call. Methods are provided to check if the computation is
complete, to wait for its completion, and to retrieve the result of
the computation. The result can only be retrieved using method
get when the computation has completed, blocking if
necessary until it is ready. Cancellation is performed by the
cancel method. Additional methods are provided to
determine if the task completed normally or was cancelled. Once a
computation has completed, the computation cannot be cancelled.
If you would like to use a Future for the sake
of cancellability but not provide a usable result, you can
declare types of the form Future<?> and
return null as a result of the underlying task. |
| Methods Summary |
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| public boolean | cancel(boolean mayInterruptIfRunning)Attempts to cancel execution of this task. This attempt will
fail if the task has already completed, has already been cancelled,
or could not be cancelled for some other reason. If successful,
and this task has not started when cancel is called,
this task should never run. If the task has already started,
then the mayInterruptIfRunning parameter determines
whether the thread executing this task should be interrupted in
an attempt to stop the task.
After this method returns, subsequent calls to {@link #isDone} will
always return true. Subsequent calls to {@link #isCancelled}
will always return true if this method returned true.
| | public V | getResult()Accessor for the future result the {@link AccountManagerFuture} represents. This
call will block until the result is available. In order to check if the result is
available without blocking, one may call {@link #isDone()} and {@link #isCancelled()}.
If the request that generated this result fails or is canceled then an exception
will be thrown rather than the call returning normally.
| | public V | getResult(long timeout, java.util.concurrent.TimeUnit unit)Accessor for the future result the {@link AccountManagerFuture} represents. This
call will block until the result is available. In order to check if the result is
available without blocking, one may call {@link #isDone()} and {@link #isCancelled()}.
If the request that generated this result fails or is canceled then an exception
will be thrown rather than the call returning normally. If a timeout is specified then
the request will automatically be canceled if it does not complete in that amount of time.
| | public boolean | isCancelled()Returns true if this task was cancelled before it completed
normally.
| | public boolean | isDone()Returns true if this task completed.
Completion may be due to normal termination, an exception, or
cancellation -- in all of these cases, this method will return
true.
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