Jetty adding web fragment to web context programmatically

I've started to use embedded Jetty Server to start some 3rd-party WAR. So I use WebAppContext:

Server server = new Server(port);
WebAppContext ctx = new WebAppContext();
ctx.setContextPath("/samplePath");
ctx.setWar(<PATH_TO_WAR>);
server.setHandler(ctx);
server.start();
server.join();

This code works (I've omitted exceptions for the sake of brevity here), however now I would like to add some functionality to the war which I want to leave intact (I mean, don't extract change and compress again). My functionality should include an integration with some custom SSO solution which should add the following:

• A Context Listener
• A Filter
• Some Context Param Variables definitions that should be read by these Filter and listener

I can't change this SSO solution because its not developed by our team, we rather take it as a thirdparty.

So I thought that adding all this to module with web-fragment would be the best approach.

My question is: what is the best way to make Jetty's web context to be 'aware' of this web fragment? A working code snippet would be great :)

Of course if there is a better alternative than web fragments for this, I'll be glad to know

The version of Jetty I currently use is (from my pom.xml): 9.2.10.v20150310

Thanks a lot in advance!