Class ForwardingListenableFuture<V>
- java.lang.Object
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- com.google.common.collect.ForwardingObject
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- com.google.common.util.concurrent.ForwardingFuture<V>
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- com.google.common.util.concurrent.ForwardingListenableFuture<V>
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- Type Parameters:
V
- The result type returned by this Future'sget
method
- All Implemented Interfaces:
ListenableFuture<V>
,java.util.concurrent.Future<V>
- Direct Known Subclasses:
ForwardingCheckedFuture
,ForwardingListenableFuture.SimpleForwardingListenableFuture
@Deprecated(since="2022-12-01") public abstract class ForwardingListenableFuture<V> extends ForwardingFuture<V> implements ListenableFuture<V>
Deprecated.The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023AListenableFuture
which forwards all its method calls to another future. Subclasses should override one or more methods to modify the behavior of the backing future as desired per the decorator pattern.Most subclasses can just use
ForwardingListenableFuture.SimpleForwardingListenableFuture
.- Since:
- 4.0
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
ForwardingListenableFuture.SimpleForwardingListenableFuture<V>
Deprecated.The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023-
Nested classes/interfaces inherited from class com.google.common.util.concurrent.ForwardingFuture
ForwardingFuture.SimpleForwardingFuture<V>
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
addListener(java.lang.Runnable listener, java.util.concurrent.Executor exec)
Deprecated.Registers a listener to be run on the given executor.-
Methods inherited from class com.google.common.util.concurrent.ForwardingFuture
cancel, get, get, isCancelled, isDone
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Methods inherited from class com.google.common.collect.ForwardingObject
toString
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Method Detail
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addListener
public void addListener(java.lang.Runnable listener, java.util.concurrent.Executor exec)
Deprecated.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 inline execution) will be caught and logged.Note: For fast, lightweight listeners that would be safe to execute in any thread, consider
MoreExecutors.sameThreadExecutor()
. For heavier listeners,sameThreadExecutor()
carries some caveats. For example, the listener may run on an unpredictable or undesirable thread:- If this
Future
is done at the timeaddListener
is called,addListener
will execute the listener inline. - If this
Future
is not yet done,addListener
will schedule the listener to be run by the thread that completes thisFuture
, which may be an internal system thread such as an RPC network thread.
Also note that, regardless of which thread executes the
sameThreadExecutor()
listener, all other registered but unexecuted listeners are prevented from running during its execution, even if those listeners are to run in other executors.This is the most general listener interface. For common operations performed using listeners, see
Futures
. For a simplified but general listener interface, seeaddCallback()
.- Specified by:
addListener
in interfaceListenableFuture<V>
- Parameters:
listener
- the listener to run when the computation is completeexec
- the executor to run the listener in
- If this
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