org.springframework.scheduling.annotation

Class AsyncResult<V>

java.lang.Object

org.springframework.scheduling.annotation.AsyncResult<V>

Type Parameters:

V - the value type

All Implemented Interfaces:

Future<V>, org.springframework.util.concurrent.ListenableFuture<V>

public class AsyncResult<V>
extends Object
implements org.springframework.util.concurrent.ListenableFuture<V>

A pass-through Future handle that can be used for method signatures which are declared with a Future return type for asynchronous execution.

As of Spring 4.1, this class implements ListenableFuture, not just plain Future, along with the corresponding support in @Async processing.

As of Spring 4.2, this class also supports passing execution exceptions back to the caller.

Since:

3.0

Author:

Juergen Hoeller, Rossen Stoyanchev

See Also:

Async, forValue(Object), forExecutionException(Throwable)

Constructor Summary

Constructors

Constructor and Description
AsyncResult(V value) Create a new AsyncResult holder.

Method Summary

Modifier and Type	Method and Description
void	addCallback(org.springframework.util.concurrent.ListenableFutureCallback<? super V> callback)
void	addCallback(org.springframework.util.concurrent.SuccessCallback<? super V> successCallback, org.springframework.util.concurrent.FailureCallback failureCallback)
boolean	cancel(boolean mayInterruptIfRunning)
CompletableFuture<V>	completable()
static <V> org.springframework.util.concurrent.ListenableFuture<V>	forExecutionException(Throwable ex) Create a new async result which exposes the given exception as an ExecutionException from Future.get().
static <V> org.springframework.util.concurrent.ListenableFuture<V>	forValue(V value) Create a new async result which exposes the given value from Future.get().
V	get()
V	get(long timeout, TimeUnit unit)
boolean	isCancelled()
boolean	isDone()

Methods inherited from class java.lang.Object

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

Constructor Detail

AsyncResult

public AsyncResult(@Nullable
                   V value)

Create a new AsyncResult holder.

Parameters:

value - the value to pass through

Method Detail

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<V>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface Future<V>

isDone

public boolean isDone()

Specified by:

isDone in interface Future<V>

get

@Nullable
public V get()
                throws ExecutionException

Specified by:

get in interface Future<V>

Throws:

ExecutionException

get

@Nullable
public V get(long timeout,
                       TimeUnit unit)
                throws ExecutionException

Specified by:

get in interface Future<V>

Throws:

ExecutionException

addCallback

public void addCallback(org.springframework.util.concurrent.ListenableFutureCallback<? super V> callback)

Specified by:

addCallback in interface org.springframework.util.concurrent.ListenableFuture<V>

addCallback

public void addCallback(org.springframework.util.concurrent.SuccessCallback<? super V> successCallback,
                        org.springframework.util.concurrent.FailureCallback failureCallback)

Specified by:

addCallback in interface org.springframework.util.concurrent.ListenableFuture<V>

completable

public CompletableFuture<V> completable()

Specified by:

completable in interface org.springframework.util.concurrent.ListenableFuture<V>

forValue

public static <V> org.springframework.util.concurrent.ListenableFuture<V> forValue(V value)

Create a new async result which exposes the given value from Future.get().

Parameters:

value - the value to expose

Since:

4.2

See Also:

Future.get()

forExecutionException

public static <V> org.springframework.util.concurrent.ListenableFuture<V> forExecutionException(Throwable ex)

Create a new async result which exposes the given exception as an ExecutionException from Future.get().

Parameters:

ex - the exception to expose (either an pre-built ExecutionException or a cause to be wrapped in an ExecutionException)

Since:

4.2

See Also:

ExecutionException