Class ImmediateFuture<V>
- All Implemented Interfaces:
ListenableFuture<V>
,Future<V>
Futures.immediateFuture(V)
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Nested Class Summary
Nested ClassesModifier and TypeClassDescription(package private) static final class
(package private) static final class
Nested classes/interfaces inherited from interface java.util.concurrent.Future
Future.State
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final LazyLogger
(package private) static final ListenableFuture
<?> private final V
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.util.concurrent.Future
exceptionNow, resultNow, state
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Field Details
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NULL
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log
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value
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Constructor Details
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ImmediateFuture
ImmediateFuture(V value)
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Method Details
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addListener
Description copied from interface:ListenableFuture
Registers a listener to be run on the given executor. The listener will run when theFuture
's computation is complete or, if the computation is already complete, immediately.There is no guaranteed ordering of execution of listeners, but any listener added through this method is guaranteed to be called once the computation is complete.
Exceptions thrown by a listener will be propagated up to the executor. Any exception thrown during
Executor.execute
(e.g., aRejectedExecutionException
or an exception thrown by direct execution) will be caught and logged.Note: If your listener is lightweight -- and will not cause stack overflow by completing more futures or adding more
directExecutor()
listeners inline -- considerMoreExecutors.directExecutor()
. Otherwise, avoid it: See the warnings on the docs fordirectExecutor
.This is the most general listener interface. For common operations performed using listeners, see
Futures
. For a simplified but general listener interface, seeaddCallback()
.Memory consistency effects: Actions in a thread prior to adding a listener happen-before its execution begins, perhaps in another thread.
Guava implementations of
ListenableFuture
promptly release references to listeners after executing them.- Specified by:
addListener
in interfaceListenableFuture<V>
- Parameters:
listener
- the listener to run when the computation is completeexecutor
- the executor to run the listener in
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cancel
public boolean cancel(boolean mayInterruptIfRunning) -
get
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get
- Specified by:
get
in interfaceFuture<V>
- Throws:
ExecutionException
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isCancelled
public boolean isCancelled()- Specified by:
isCancelled
in interfaceFuture<V>
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isDone
public boolean isDone() -
toString
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