Interface Failure

  • Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

    @ConsumerType
    @FunctionalInterface
    public interface Failure
    Failure callback for a Promise.

    A Failure callback is registered with a Promise using the Promise.then(Success, Failure) method and is called if the Promise is resolved with a failure.

    This is a functional interface and can be used as the assignment target for a lambda expression or method reference.

    • Method Detail

      • fail

        void fail​(Promise<?> resolved)
           throws java.lang.Exception
        Failure callback for a Promise.

        This method is called if the Promise with which it is registered resolves with a failure.

        In the remainder of this description we will refer to the Promise returned by Promise.then(Success, Failure) when this Failure callback was registered as the chained Promise.

        If this methods completes normally, the chained Promise must be failed with the same exception which failed the resolved Promise. If this method throws an exception, the chained Promise must be failed with the thrown exception.

        Parameters:
        resolved - The failed resolved Promise.
        Throws:
        java.lang.Exception - The chained Promise must be failed with the thrown exception.