This week's book giveaway is in the Reactive Progamming forum. We're giving away four copies of Reactive Streams in Java: Concurrency with RxJava, Reactor, and Akka Streams and have Adam Davis on-line! See this thread for details.
Thank you for pointing me to some good links. Actually, I am learning a webservice course and my instructor told me to convert a formally written 'Shopping Cart' project from servlet to Webservice. I don't know how to do that. How do I change a servlet to a web service? Hence I am looking for some examples with a lot of code in them so that I may get some understanding. I will take a look at the link provided by you.