# Vaadin Java EE (No XML) Integration

Create a Java EE 6 Maven 3 War Project
Create beans.xml with the content <beans/> and put it into [WAR]/WEB-INF folder
Add a single dependency to vaadin: 


<dependency>
<groupId>com.vaadin</groupId>
	<artifactId>vaadin</artifactId>
	<version>6.8.1</version>
</dependency>


 


Create a qualifier:


@Qualifier
@Retention(RUNTIME)
@Target({FIELD, TYPE})
public @interface VaadinApplication {}





Create a servlet and inject the Vaadin application. The JavaEEIntegrationServlet servlet is reusable:



import com.vaadin.Application;
import com.vaadin.terminal.gwt.server.AbstractApplicationServlet;
import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;

@WebServlet(urlPatterns = "/*")
public class JavaEEIntegrationServlet extends AbstractApplicationServlet {

    @Inject @VaadinApplication
    Application application;

    @Override
    protected Class getApplicationClass() throws ClassNotFoundException {
        return application.getClass();
    }
    @Override
    protected Application getNewApplication(HttpServletRequest request) throws ServletException {
        return application;
    }
}





Create an application as @SessionScoped managed bean annotated with the VaadinApplication qualifier:


import com.abien.vaadin.helloapp.greetings.boundary.Greetings;
import com.vaadin.Application;
import com.vaadin.ui.*;
import javax.enterprise.context.SessionScoped;
import javax.enterprise.event.Event;
import javax.inject.Inject;


@SessionScoped 
@VaadinApplication
public class HelloApp extends Application {

    @Inject
    Greetings greetingService;

    @Inject
    Event buttonEvents;
    
    @Override
    public void init() {
        VerticalLayout layout = new VerticalLayout();
        layout.setMargin(true);
		//...
        Window mainWindow = new Window("Vaadin 6.8 - Java EE Integration", layout);
        setMainWindow(mainWindow);
    }
}





Now EJB 3 and CDI injection should work as expected:

@Stateless
public class Greetings {
    
    @Inject
    TimeProvider provider;

    public String sayHello(String name) {
        return "Hello " + name + " at: " + provider.getCurrentTime();
    }
}

public class TimeProvider {

    public long getCurrentTime(){
        return System.currentTimeMillis();
    }
}




The Maven 3 project was pushed to https://github.com/AdamBien/vaadin-javaee