Package io.lettuce.core.internal

Class Futures

java.lang.Object

io.lettuce.core.internal.Futures

public abstract class Futures
extends Object

Utility methods for Future handling. This class is part of the internal API and may change without further notice.

Since:

5.1

Author:

Mark Paluch

Method Summary

Modifier and Type	Method	Description
static <V> void	adapt(Future<V> source, CompletableFuture<V> target)	Adapt Netty's Future emitting a value result into a CompletableFuture.
static CompletableFuture<Void>	allOf(Collection<? extends CompletionStage<?>> stages)	Create a composite CompletableFuture is composed from the given stages.
static boolean	await(long timeout, TimeUnit unit, Future<?> future)	Wait until future is complete or the supplied timeout is reached.
static boolean	await(Duration timeout, Future<?> future)	Wait until future is complete or the supplied timeout is reached.
static boolean	awaitAll(long timeout, TimeUnit unit, Future<?>... futures)	Wait until futures are complete or the supplied timeout is reached.
static boolean	awaitAll(Duration timeout, Future<?>... futures)	Wait until futures are complete or the supplied timeout is reached.
static <T> T	awaitOrCancel(RedisFuture<T> cmd, long timeout, TimeUnit unit)	Wait until futures are complete or the supplied timeout is reached.
static <T> CompletableFuture<T>	failed(Throwable throwable)	Create a CompletableFuture that is completed exceptionally with throwable.
static <V> CompletionStage<V>	toCompletionStage(Future<V> future)	Adapt Netty's ChannelFuture emitting a Void result.

Methods inherited from class java.lang.Object

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

Method Detail

allOf

public static CompletableFuture<Void> allOf(Collection<? extends CompletionStage<?>> stages)

Create a composite CompletableFuture is composed from the given stages.

Parameters:

stages - must not be null.

Returns:

the composed CompletableFuture.

Since:

5.1.1

failed

public static <T> CompletableFuture<T> failed(Throwable throwable)

Create a CompletableFuture that is completed exceptionally with throwable.

Parameters:

throwable - must not be null.

Returns:

the exceptionally completed CompletableFuture.

toCompletionStage

public static <V> CompletionStage<V> toCompletionStage(Future<V> future)

Adapt Netty's ChannelFuture emitting a Void result.

Parameters:

future - the ChannelFuture to adapt.

Returns:

the CompletableFuture.

Since:

6.0

adapt

public static <V> void adapt(Future<V> source,
                             CompletableFuture<V> target)

Adapt Netty's Future emitting a value result into a CompletableFuture.

Parameters:

source - source Future emitting signals.

target - target CompletableFuture.

Since:

6.0

await

public static boolean await(Duration timeout,
                            Future<?> future)

Wait until future is complete or the supplied timeout is reached.

Parameters:

timeout - Maximum time to wait for futures to complete.

future - Future to wait for.

Returns:

true if future completes in time, otherwise false

Since:

6.0

await

public static boolean await(long timeout,
                            TimeUnit unit,
                            Future<?> future)

Wait until future is complete or the supplied timeout is reached.

Parameters:

timeout - Maximum time to wait for futures to complete.

unit - Unit of time for the timeout.

future - Future to wait for.

Returns:

true if future completes in time, otherwise false

Since:

6.0

awaitAll

public static boolean awaitAll(Duration timeout,
                               Future<?>... futures)

Wait until futures are complete or the supplied timeout is reached.

Parameters:

timeout - Maximum time to wait for futures to complete.

futures - Futures to wait for.

Returns:

true if all futures complete in time, otherwise false

Since:

6.0

awaitAll

public static boolean awaitAll(long timeout,
                               TimeUnit unit,
                               Future<?>... futures)

Wait until futures are complete or the supplied timeout is reached.

Parameters:

timeout - Maximum time to wait for futures to complete.

unit - Unit of time for the timeout.

futures - Futures to wait for.

Returns:

true if all futures complete in time, otherwise false

awaitOrCancel

public static <T> T awaitOrCancel(RedisFuture<T> cmd,
                                  long timeout,
                                  TimeUnit unit)

Wait until futures are complete or the supplied timeout is reached. Commands are canceled if the timeout is reached but the command is not finished.

Type Parameters:

T - Result type

Parameters:

cmd - Command to wait for

timeout - Maximum time to wait for futures to complete

unit - Unit of time for the timeout

Returns:

Result of the command.

Since:

6.0