Hie I have a page in my java/jsp based web application which shows list of new products..
I want to provide an rss feed for this. So, what is way to create a rss feed which other can use to subscribe?
I could find some java based feed creators. But, the question is how the feed will be self updating based on new products added to the system?
I'm not familiar with Java, so here's a general thought.
Your feed should be accessible via some URL, like http://mydomain.com/products/feeds/rss. When Feed Aggregator fetches this URL, the servlet (I believe this is how they are called in Java world) fetches a list of recent products from the DB or wherever, build RSS feed and then sends it back to the requester, which turns out to be a Feed Aggregator.
For performance reasons this particular servlet may not access the database each time it's executing. Rather, it can cache either resulting feed (recommended, HTTP allows for a very flexible caching) or a result of database query somewhere in memory/on disk.