The Apache Felix Http Bridge requires a Http Proxy on the SErvlet Container (Jetty) Side in order to work properly.
The default implementation uses the org.apache.felix.http.proxy.ProxyServlet.
However, this only forwards requests to a certain context, e.g. /osgi.
This breaks with a lot of components, e.g. Vaadin is required to be exposed to /VAADIN
In order to compensate, a Filter is used instead, which forwards to the HttpServlet of the Apache Felix Http Bridge.
To only forward/dispatch requests which can actually be handled by OSGi-registered Servlets, all registered Servlet's are persisted here.