Grace Async Framework
· Provides Async features of Grace aim to simplify concurrent programming within the framework and include the concept of Promises and a unified event model.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window grace-events-5.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.