Class SupplierHelper

java.lang.Object

io.helidon.faulttolerance.SupplierHelper

public class SupplierHelper
extends Object

Helper to handle async suppliers that return CompletionStage.

Method Summary

Modifier and Type	Method	Description
static RuntimeException	toRuntimeException(Throwable t)	Wraps a Throwable in a RuntimeException of type SupplierException if necessary.
static <T> Supplier<T>	toSyncSupplier(Supplier<? extends CompletionStage<T>> supplier, long timeout, TimeUnit unit)	Maps a supplier returning a CompletionStage<T> to a supplier returning T by waiting on the stage; interruption of the calling thread during that wait restores its interrupt status before propagation as SupplierException, while an InterruptedException reported by the stage does not modify the calling thread's interrupt status.
static Throwable	unwrapThrowable(Throwable t)	Gets the underlying cause of a SupplierException or of a ExecutionException.

Methods inherited from class Object

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

Method Details

toSyncSupplier

public static <T> Supplier<T> toSyncSupplier(Supplier<? extends CompletionStage<T>> supplier,
 long timeout,
 TimeUnit unit)

Maps a supplier returning a CompletionStage<T> to a supplier returning T by waiting on the stage; interruption of the calling thread during that wait restores its interrupt status before propagation as SupplierException, while an InterruptedException reported by the stage does not modify the calling thread's interrupt status.

Type Parameters:

T - type produced by supplier

Parameters:

supplier - the async supplier

timeout - time to wait

unit - unit of time

Returns:

the supplier

toRuntimeException

public static RuntimeException toRuntimeException(Throwable t)

Wraps a Throwable in a RuntimeException of type SupplierException if necessary. Will never nest SupplierExceptions.

Parameters:

t - the throwable

Returns:

the exception

unwrapThrowable

public static Throwable unwrapThrowable(Throwable t)

Gets the underlying cause of a SupplierException or of a ExecutionException.

Parameters:

t - the throwable

Returns:

the cause or the same throwable