Module io.helidon.common.reactive

Package io.helidon.common.reactive

Interface OptionalCompletionStage<T>

Type Parameters:

T - return type of the asynchronous operation

All Superinterfaces:

CompletionStage<Optional<T>>

public interface OptionalCompletionStage<T>
extends CompletionStage<Optional<T>>

A completion stage that allows processing of cases when the element is present and when not.

Method Summary

Modifier and Type	Method	Description
static <T> OptionalCompletionStage<T>	create(CompletionStage<Optional<T>> originalStage)	Creates a new instance of the completion stage that allows processing of cases when the element is present and when not.
OptionalCompletionStage<T>	onEmpty(Runnable action)	Returns a new OptionalCompletionStage that, when this stage completes normally and returns null, executes the given action.
OptionalCompletionStage<T>	onValue(Consumer<? super T> action)	Returns a new OptionalCompletionStage that, when this stage completes normally and returns non-null, is executed with this stage's result as the argument to the supplied action.

Methods inherited from interface java.util.concurrent.CompletionStage

acceptEither, acceptEitherAsync, acceptEitherAsync, applyToEither, applyToEitherAsync, applyToEitherAsync, exceptionally, exceptionallyAsync, exceptionallyAsync, exceptionallyCompose, exceptionallyComposeAsync, exceptionallyComposeAsync, handle, handleAsync, handleAsync, runAfterBoth, runAfterBothAsync, runAfterBothAsync, runAfterEither, runAfterEitherAsync, runAfterEitherAsync, thenAccept, thenAcceptAsync, thenAcceptAsync, thenAcceptBoth, thenAcceptBothAsync, thenAcceptBothAsync, thenApply, thenApplyAsync, thenApplyAsync, thenCombine, thenCombineAsync, thenCombineAsync, thenCompose, thenComposeAsync, thenComposeAsync, thenRun, thenRunAsync, thenRunAsync, toCompletableFuture, whenComplete, whenCompleteAsync, whenCompleteAsync

Method Details

onEmpty

OptionalCompletionStage<T> onEmpty(Runnable action)

Returns a new OptionalCompletionStage that, when this stage completes normally and returns null, executes the given action.

Parameters:

action - the action to perform before completing the returned OptionalCompletionStage

Returns:

the new OptionalCompletionStage

onValue

OptionalCompletionStage<T> onValue(Consumer<? super T> action)

Returns a new OptionalCompletionStage that, when this stage completes normally and returns non-null, is executed with this stage's result as the argument to the supplied action.

Parameters:

action - the action to perform before completing the returned OptionalCompletionStage

Returns:

the new OptionalCompletionStage

create

static <T> OptionalCompletionStage<T> create(CompletionStage<Optional<T>> originalStage)

Creates a new instance of the completion stage that allows processing of cases when the element is present and when not.

Type Parameters:

T - return type of the asynchronous operation

Parameters:

originalStage - source completion stage instance

Returns:

the new OptionalCompletionStage