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