I want to host/run RESTHeart on an IBM WebSphere Application Server (traditional V8.5 or Liberty). For default RESTHeart is made to run on Undertow/JBoss(?).
Is there any possibility to do so? I couldn't find anything about that.
You can't. RESTHeart is a plain Java application, it is NOT meant to be ran inside any application server. It's not true it's made to run inside Undertow/JBoss, instead RESTHeart embeds Undertow, to serve HTTP requests very efficiently.
RESTHeart has been developed with a micro-services architecture in mind, because we wanted something simple, without the need to run and manage a fully fledged application server in our production environments.