Question

My application architecture looks like this.
GWT in the UI layer -> Calls GWT RPC service (servlets) -> Looksup Spring Beans -> Calls the DAO layer which is implemented in JPA (EclipseLink).

I have successfully tested the application with GWT rpc services directly calling the JPA layer. But I am having trouble integrating spring into the mix. (Primary usage of Spring is transaction management).

I tried googling, but could not find any good article on the topic. (Most of the articles refers to using Spring MVC within GWT, which is not what I am looking for)
Could you please point me to some article/tutorial?

Thanks in advance!

Manoj

Answer 1

If you’re looking for something really simple, why don’t you just call a bean from the application context from your service implementation? Something like:

public class GreetingServiceImpl extends RemoteServiceServlet implements
    GreetingService {

  public String greetServer(String input) throws IllegalArgumentException {
    return WebApplicationContextUtils.getRequiredWebApplication(getServletContext()).
      getBean(GreetingService .class).greetServer(input);
  }
}

The backing application context must provide a “real” implementation of GreetingService.

Seee also this article.