I just completed my first shot at integrating Spring with GWT. You can check it out here

Here’s what you do to expose a simple service.

1) Write the remote service, note that the service no longer extends RemoteServiceServlet however HelloService should still implement RemoteService


public class HelloServiceImpl implements HelloService {
public String sayHello(String name) {
return "hello " + name;
}
}

2) Define this service in your application context

<bean id=”helloService” class=”nl.jteam.hello.server.HelloServiceImpl”/>

3) expose the bean as a gwt service

<bean id=”defaultHandlerMapping” class=”org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping”/>

<bean name=”/helloService” class=”nl.jteam.gwt.exporter.GwtInvokerServiceExporter”>
<property name=”service” ref=”helloService”/>
<property name=”serviceInterface” value=”nl.jteam.hello.client.HelloService”/>
</bean>

4) Change the clientcode to point to your Spring service. be sure to use an absolute url while running in hosted mode or it will complain


helloService = (HelloServiceAsync) GWT.create(HelloService.class);
ServiceDefTarget endpoint = (ServiceDefTarget) helloService;
endpoint.setServiceEntryPoint("http://localhost:8080/helloservice");

Feedback is appreciated