While it is easy to publish existing servlets via HttpService is there any portable way how to re-use existing Filter implementations?
We have custom Authorization and Authentization filters that are stacked on each other.
What about Listeners? ServletContext*Listener Session*Listener are user quite often.
posted 5 years ago
Yep you can use the WAB (Web Application Bundle or WAR+Bundle) support that was added in the 4.2 enterprise spec release  to support all the servlet 2.5 and JSP 2.1 specifications. The eclipse gemini project  has support for this specification and I've certainly used filters with this.
There's even a chapter dedicated to web applications and services in our book which should allow you to try this out for your self with some canned examples.