Promise is an efficient replacement of default Java CompletionStage interface and resembles JavaScript Promise, representing partial and possibly asynchronous computations of a large one. DataKernel promises are faster and better optimized, with minimal overhead, memory consumption and Garbage Collector load.

You can add this module to your project by inserting the following dependency to pom.xml:

<dependency>
    <groupId>io.datakernel</groupId>
    <artifactId>datakernel-promise</artifactId>
    <version>3.2-SNAPSHOT</version>
</dependency>