Module org.neo4j.driver

Package org.neo4j.driver.internal.util

Class Futures

java.lang.Object

org.neo4j.driver.internal.util.Futures

public final class Futures
extends Object

Method Summary

Modifier and Type	Method	Description
static CompletionException	asCompletionException(Throwable error)	Helped method to turn given exception into a CompletionException.
static <V> V	blockingGet(CompletionStage<V> stage)
static <V> V	blockingGet(CompletionStage<V> stage, Runnable interruptHandler)
static CompletionException	combineErrors(Throwable error1, Throwable error2)	Combine given errors into a single CompletionException to be rethrown from inside a CompletionStage chain.
static <T> CompletableFuture<T>	completedWithNull()
static Throwable	completionExceptionCause(Throwable error)	Helper method to extract cause of a CompletionException.
static <T> BiConsumer<T,Throwable>	futureCompletingConsumer(CompletableFuture<T> future)
static <T> T	getNow(CompletionStage<T> stage)

Methods inherited from class java.lang.Object

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

Method Details

completedWithNull

public static <T> CompletableFuture<T> completedWithNull()

blockingGet

public static <V> V blockingGet(CompletionStage<V> stage)

blockingGet

public static <V> V blockingGet(CompletionStage<V> stage,
 Runnable interruptHandler)

getNow

public static <T> T getNow(CompletionStage<T> stage)

completionExceptionCause

public static Throwable completionExceptionCause(Throwable error)

Helper method to extract cause of a CompletionException.

When using CompletionStage.whenComplete(BiConsumer) and CompletionStage.handle(BiFunction) propagated exceptions might get wrapped in a CompletionException.

Parameters:

error - the exception to get cause for.

Returns:

cause of the given exception if it is a CompletionException, given exception otherwise.

asCompletionException

public static CompletionException asCompletionException(Throwable error)

Helped method to turn given exception into a CompletionException.

Parameters:

error - the exception to convert.

Returns:

given exception wrapped with CompletionException if it's not one already.

combineErrors

public static CompletionException combineErrors(Throwable error1,
 Throwable error2)

Combine given errors into a single CompletionException to be rethrown from inside a CompletionStage chain.

Parameters:

error1 - the first error or null.

error2 - the second error or null.

Returns:

null if both errors are null, CompletionException otherwise.

futureCompletingConsumer

public static <T> BiConsumer<T,Throwable> futureCompletingConsumer(CompletableFuture<T> future)