datatree-promise
Promise for Java
ES6-like Promise, based on the Java8’s CompletableFuture API. A Promise is an object that may produce a single value some time in the future: either a resolved value, or a reason that it’s not resolved (e.g., a network error occurred). Promise users can attach callbacks to handle the fulfilled value or the reason for rejection.
Documentation
License
DataTree is licensed under the Apache License V2, you can use it in your commercial products for free.