Package io.github.resilience4j.core.functions

Class OnceConsumer<T>

java.lang.Object

io.github.resilience4j.core.functions.OnceConsumer<T>

Type Parameters:

T - the type of the input which is passed to the consumer and executed once.

public final class OnceConsumer<T>
extends java.lang.Object

Apply a computation only once.

Method Summary

Modifier and Type	Method	Description
void	applyOnce(java.util.function.Consumer<T> consumer)	Apply a computation on subject only once.
static <T> OnceConsumer<T>	of(T t)	Create a do once consumer.

Methods inherited from class java.lang.Object

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

Method Details

of

public static <T> OnceConsumer<T> of(T t)

Create a do once consumer.

Type Parameters:

T - type of input on which operation is applied.

Parameters:

t - input which is passed to operation

Returns:

applyOnce

public void applyOnce(java.util.function.Consumer<T> consumer)

Apply a computation on subject only once.

 List<String> lst = new ArrayList<>();

 OnceConsumer<List<String>> once = OnceConsumer.of(lst);
 once.applyOnce((l) -> l.add("Hello World"));
 once.applyOnce((l) -> l.add("Hello World"));

 assertThat(lst).hasSize(1).contains("Hello World");

 

Parameters:

consumer - computation run once with input t