Package io.github.resilience4j.core.functions

Class 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

      All Methods Static Methods Instance Methods Concrete Methods 
      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 Detail

      • 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