Just a short post to say that I recently had this problem – I needed to get my event web service pushing messages to my GWT server side code. But how to expose the GWT server side code like a web service? The solution I found was using the GwtRpcCommLayer library. Using this library you can expose your GWT server side methods to any Java application (Swing or command line) or in my case a Java web service. It’s very straightforward to use and there is an example Eclipse project which you can easily get up and running. For my purposes I then used theĀ gwt-comet library to push the event messages from the GWT server side code (without polling) to my GWT client side code/browser for presentation. Very cool!