Module io.smallrye.mutiny

Package io.smallrye.mutiny.groups

Class UniJoin.JoinFirstStrategy<T>

java.lang.Object

io.smallrye.mutiny.groups.UniJoin.JoinFirstStrategy<T>

Type Parameters:

T - the type of the Uni values

All Implemented Interfaces:

UniJoin.JoinFirstStrategyTerminal<T>

Enclosing class:

UniJoin

public static class UniJoin.JoinFirstStrategy<T>
extends Object
implements UniJoin.JoinFirstStrategyTerminal<T>

Defines how to deal with failures while joining Uni references with UniJoin.first(List)}.

Method Summary

Modifier and Type	Method	Description
Uni<T>	toTerminate()	Forward the value or failure from the first Uni to terminate.
UniJoin.JoinFirstStrategyTerminal<T>	usingConcurrencyOf(int limit)	Limit the number of concurrent upstream subscriptions.
Uni<T>	withItem()	Forward the value from the first Uni to terminate with a value.

Methods inherited from class java.lang.Object

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

Method Details

usingConcurrencyOf

@CheckReturnValue
public UniJoin.JoinFirstStrategyTerminal<T> usingConcurrencyOf(int limit)

Limit the number of concurrent upstream subscriptions.

When not specified all upstream Uni are being subscribed when the joining Uni is subscribed.

Setting a limit is useful when you have a large number of Uni to join and their simultaneous subscriptions might overwhelm resources (e.g., database connections, etc).

Parameters:

limit - the concurrency limit, must be strictly positive

Returns:

an object to conclude the join strategy

toTerminate

@CheckReturnValue
public Uni<T> toTerminate()

Forward the value or failure from the first Uni to terminate.

Returns:

a new Uni

withItem

@CheckReturnValue
public Uni<T> withItem()

Forward the value from the first Uni to terminate with a value.

When all Uni references fail then failures are collected into a CompositeException, which is then forwarded by the returned Uni.

Specified by:

withItem in interface UniJoin.JoinFirstStrategyTerminal<T>

Returns:

a new Uni