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I want to make document printing service using GWT(javascript+servlet) and EJB. What is the best way to cause EJB to notificate GWT client about some event is happened? Of course, I can make it with using Timer (send request to EJB with some interval), but may be exist some more elegant way? (for example with callback, but I dont understand how to release it). P.S.: I will use multitier architectur: JavaScript(GWT)+Servlet(GWT RPC)+EJB. And i working on document printing service (i want to notificate client that some file(s) is printed (also will be good if you give me advice of making progress bar)). Thanks!

It is possible to use GWT's "shared" folder for storing beans, that will be used by EJB, GWT servlet and gwt client(javascript) side?

I have developed EJB using NETbeans IDE having glassfish server. I can call it from standalone java, only if this java project is developed under NETbeans and run under same JRE. But I need to find out how to run it in different jre's. I could not find much help on this one. Any suggestions? (or related links would do) Thanks,