Package io.smallrye.mutiny.operators.uni

Class UniMemoizeOp<I>

java.lang.Object

io.smallrye.mutiny.operators.AbstractUni<O>

io.smallrye.mutiny.operators.UniOperator<I,I>

io.smallrye.mutiny.operators.uni.UniMemoizeOp<I>

All Implemented Interfaces:

ContextSupport, UniSubscriber<I>, Uni<I>

public class UniMemoizeOp<I>
extends UniOperator<I,I>
implements UniSubscriber<I>

Constructor Summary

Constructors

Constructor	Description
UniMemoizeOp(Uni<? extends I> upstream)
UniMemoizeOp(Uni<? extends I> upstream, java.util.function.BooleanSupplier invalidationRequested)

Method Summary

Modifier and Type	Method	Description
Context	context()	Provide a context.
void	onFailure(java.lang.Throwable failure)	Called if the computation of the item by the subscriber Uni failed.
void	onItem(I item)	Event handler called once the item has been computed by the subscribed Uni.
void	onSubscribe(UniSubscription subscription)	Event handler called once the subscribed Uni has taken into account the subscription.
void	subscribe(UniSubscriber<? super I> subscriber)

Methods inherited from class io.smallrye.mutiny.operators.UniOperator

upstream

Methods inherited from class io.smallrye.mutiny.operators.AbstractUni

await, awaitUsing, cache, convert, emitOn, ifNoItem, log, log, memoize, onCancellation, onFailure, onFailure, onFailure, onItem, onItemOrFailure, onSubscribe, onSubscription, onTermination, repeat, runSubscriptionOn, subscribe, subscribe, toMulti, withContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.smallrye.mutiny.Uni

attachContext, call, call, chain, chain, eventually, eventually, flatMap, invoke, invoke, map, plug, replaceIfNullWith, replaceIfNullWith, replaceWith, replaceWith, replaceWith, replaceWithNull, replaceWithVoid, stage, subscribeAsCompletionStage, subscribeAsCompletionStage

Constructor Detail

UniMemoizeOp

public UniMemoizeOp(Uni<? extends I> upstream)

UniMemoizeOp

public UniMemoizeOp(Uni<? extends I> upstream,
                    java.util.function.BooleanSupplier invalidationRequested)

Method Detail

context

public Context context()

Description copied from interface: ContextSupport

Provide a context.

Since calls to this method shall only be triggered when a Mutiny pipeline uses a withContext operator, there is no need in general for caching the context value in a field of the implementing class. Exceptions include operators that have cross-subscriber semantics such as memoizers or broadcasters.

This method is expected to be called once per withContext operator.

Specified by:

context in interface ContextSupport

Returns:

the context, must not be null.

subscribe

public void subscribe(UniSubscriber<? super I> subscriber)

Specified by:

subscribe in class AbstractUni<I>

onSubscribe

public void onSubscribe(UniSubscription subscription)

Description copied from interface: UniSubscriber

Event handler called once the subscribed Uni has taken into account the subscription. The Uni have triggered the computation of the item. IMPORTANT: UniSubscriber.onItem(Object) and UniSubscriber.onFailure(Throwable) would not be called before the invocation of this method.

• Executor: Operate on no particular executor, except if Uni.runSubscriptionOn(Executor) has been called
• Exception: Throwing an exception cancels the subscription, UniSubscriber.onItem(Object) and UniSubscriber.onFailure(Throwable) won't be called

Specified by:

onSubscribe in interface UniSubscriber<I>

Parameters:

subscription - the subscription allowing to cancel the computation.

onItem

public void onItem(I item)

Description copied from interface: UniSubscriber

Event handler called once the item has been computed by the subscribed Uni. IMPORTANT: this method will be only called once per subscription. If UniSubscriber.onFailure(Throwable) is called, this method won't be called.

• Executor: Operate on no particular executor, except if Uni.emitOn(java.util.concurrent.Executor) has been called
• Exception: Throwing an exception cancels the subscription.

Specified by:

onItem in interface UniSubscriber<I>

Parameters:

item - the item, may be null.

onFailure

public void onFailure(java.lang.Throwable failure)

Description copied from interface: UniSubscriber

Called if the computation of the item by the subscriber Uni failed. IMPORTANT: this method will be only called once per subscription. If UniSubscriber.onItem(Object) is called, this method won't be called.

• Executor: Operate on no particular executor, except if Uni.emitOn(java.util.concurrent.Executor) has been called
• Exception: Throwing an exception cancels the subscription.

Specified by:

onFailure in interface UniSubscriber<I>

Parameters:

failure - the failure, cannot be null.