Apache Geode
· Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
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 geode-web-1.15.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.