CheckedFuture cannot properly support the chained operations that are the
primary goal of ListenableFuture. CheckedFuture also encourages users to
rethrow exceptions from one thread in another thread, producing misleading stack traces.
Additionally, it has a surprising policy about which exceptions to map and which to leave
untouched. Guava users who want a CheckedFuture can fork the classes for their own
use, possibly specializing them to the particular exception type they use. We recommend that
most people use ListenableFuture and perform any exception wrapping themselves. This
class is scheduled for removal from Guava in January 2019.@Beta @Deprecated @GwtIncompatible public abstract class AbstractCheckedFuture<V,X extends Exception> extends ForwardingListenableFuture.SimpleForwardingListenableFuture<V> implements CheckedFuture<V,X>
ListenableFuture that adds support for the checkedGet() and checkedGet(long, TimeUnit) methods.ForwardingListenableFuture.SimpleForwardingListenableFuture<V>ForwardingFuture.SimpleForwardingFuture<V>| Modifier | Constructor and Description |
|---|---|
protected |
AbstractCheckedFuture(ListenableFuture<V> delegate)
Deprecated.
Constructs an
AbstractCheckedFuture that wraps a delegate. |
| Modifier and Type | Method and Description |
|---|---|
V |
checkedGet()
Deprecated.
Exception checking version of
Future.get() that will translate InterruptedException, CancellationException and ExecutionException into
application-specific exceptions. |
V |
checkedGet(long timeout,
TimeUnit unit)
Deprecated.
Exception checking version of
Future.get(long, TimeUnit) that will translate InterruptedException, CancellationException and ExecutionException into
application-specific exceptions. |
protected abstract X |
mapException(Exception e)
Deprecated.
Translates from an
InterruptedException, CancellationException or ExecutionException thrown by get to an exception of type X to be thrown by
checkedGet. |
delegateaddListenercancel, get, get, isCancelled, isDonetoStringclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitaddListenerprotected AbstractCheckedFuture(ListenableFuture<V> delegate)
AbstractCheckedFuture that wraps a delegate.protected abstract X mapException(Exception e)
InterruptedException, CancellationException or ExecutionException thrown by get to an exception of type X to be thrown by
checkedGet. Subclasses must implement this method.
If e is an InterruptedException, the calling checkedGet method has
already restored the interrupt after catching the exception. If an implementation of mapException(Exception) wishes to swallow the interrupt, it can do so by calling Thread.interrupted().
Subclasses may choose to throw, rather than return, a subclass of RuntimeException
to allow creating a CheckedFuture that throws both checked and unchecked exceptions.
@CanIgnoreReturnValue public V checkedGet() throws X extends Exception
Future.get() that will translate InterruptedException, CancellationException and ExecutionException into
application-specific exceptions.
This implementation calls ForwardingFuture.get() and maps that method's standard exceptions to
instances of type X using mapException(java.lang.Exception).
In addition, if get throws an InterruptedException, this implementation will
set the current thread's interrupt status before calling mapException.
checkedGet in interface CheckedFuture<V,X extends Exception>X - if ForwardingFuture.get() throws an InterruptedException, CancellationException, or ExecutionExceptionX extends Exception@CanIgnoreReturnValue public V checkedGet(long timeout, TimeUnit unit) throws TimeoutException, X extends Exception
Future.get(long, TimeUnit) that will translate InterruptedException, CancellationException and ExecutionException into
application-specific exceptions. On timeout this method throws a normal TimeoutException.
This implementation calls ForwardingFuture.get(long, TimeUnit) and maps that method's standard
exceptions (excluding TimeoutException, which is propagated) to instances of type
X using mapException(java.lang.Exception).
In addition, if get throws an InterruptedException, this implementation will
set the current thread's interrupt status before calling mapException.
checkedGet in interface CheckedFuture<V,X extends Exception>X - if ForwardingFuture.get() throws an InterruptedException, CancellationException, or ExecutionExceptionTimeoutException - if retrieving the result timed out.X extends ExceptionCopyright © 2010–2019. All rights reserved.