Intra-server GWT RPC.java

package com.javajosh.bender.server;

import com.javajosh.bender.client.GreetingService;
import com.javajosh.bender.client.GreetingServiceAsync;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

/**
 * The server side implementation of the RPC service.
 */
@SuppressWarnings("serial")
public class GreetingServiceImpl extends RemoteServiceServlet implements
		GreetingService {
	//Logger.getLogger(GreetingService.class.getName());
	
	public String greetServer(String input) {
		String serverInfo = getServletContext().getServerInfo();
		String userAgent = getThreadLocalRequest().getHeader("User-Agent");
		return "Hello, " + input + "!<br><br>I am running " + serverInfo
				+ ".<br><br>It looks like you are using:<br>" + userAgent;
	}
	
	public void callService() {
		final GreetingServiceAsync greetingService = GWT.create(GreetingService.class);
		String textToServer ="HELLO";
		greetingService.greetServer(textToServer,
				new AsyncCallback<String>() {
					public void onFailure(Throwable caught) {
						System.out.println("problem");
					}

					public void onSuccess(String result) {
						System.out.println(result);
					}
				});
	}
}