That was deployed to WildFly (RedHat's open source...
# tornadofx
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That was deployed to WildFly (RedHat's open source JBoss). With remoting, you do need a JAR file on the TornadoFX side. WildFly tunnels the remoting over HTTP/S which is great for firewalls. However, it's not RESTful because the tunneling is proprietary. (You CAN'T call the remoted EJB from ReactJS for example.)