We have deployed a J2EE application. What would be the best way to integrate it with LS Server?
Two steps are required. You should include Lightstreamers JavaScript libraries inside your pages (that are still served by your app server). Then you should develop a Lightstreamer Data Adapter (and optionally a Metadata Adapter) to attach Lightstreamer Server to your data source. If the data source is a J2EE app server, you will probably use JMS to do the integration. But notice that you can choose whatever technology to integrate the Lightstreamers Adapters with your existing systems.