I spent the last week trying to understand the HeartBeatWS code. It's still very confusing to get my head around. 

I've spent some time looking at other code and tutorials related to web services and wsdl. It's all coming back now since I worked on web services previously for the TrustStore application but the HeartBeat application seems a lot more complex!

I'll continue to spend more time trying to figure out the code and doing more tutorials!