Package graphql.execution.reactive

Class CompletionStageMappingOrderedPublisher<D,U>

java.lang.Object

graphql.execution.reactive.CompletionStageMappingPublisher<D,U>

graphql.execution.reactive.CompletionStageMappingOrderedPublisher<D,U>

Type Parameters:

D - the downstream type

U - the upstream type to be mapped to

All Implemented Interfaces:

org.reactivestreams.Publisher<D>

public class CompletionStageMappingOrderedPublisher<D,U>
extends CompletionStageMappingPublisher<D,U>

A reactive Publisher that bridges over another Publisher of `D` and maps the results to type `U` via a CompletionStage, handling errors in that stage but keeps the results in order of downstream publishing. This means it must queue unfinished completion stages in memory in arrival order.

Field Summary

Fields inherited from class graphql.execution.reactive.CompletionStageMappingPublisher

mapper, upstreamPublisher

Constructor Summary

Constructors

Constructor	Description
CompletionStageMappingOrderedPublisher(org.reactivestreams.Publisher<U> upstreamPublisher, Function<U,CompletionStage<D>> mapper)	You need the following :

Method Summary

Modifier and Type	Method	Description
protected @NonNull org.reactivestreams.Subscriber<? super U>	createSubscriber(org.reactivestreams.Subscriber<? super D> downstreamSubscriber)

Methods inherited from class graphql.execution.reactive.CompletionStageMappingPublisher

getUpstreamPublisher, subscribe

Methods inherited from class java.lang.Object

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

Constructor Details

CompletionStageMappingOrderedPublisher

public CompletionStageMappingOrderedPublisher(org.reactivestreams.Publisher<U> upstreamPublisher,
 Function<U,CompletionStage<D>> mapper)

You need the following :

Parameters:

upstreamPublisher - an upstream source of data

mapper - a mapper function that turns upstream data into a promise of mapped D downstream data

Method Details

createSubscriber

protected @NonNull org.reactivestreams.Subscriber<? super U> createSubscriber(org.reactivestreams.Subscriber<? super D> downstreamSubscriber)

Overrides:

createSubscriber in class CompletionStageMappingPublisher<D,U>