import javax.servlet.ServletContext;
import javax.servlet.ServletException;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import org.springframework.web.util.IntrospectorCleanupListener;

/**
 * This initializer creates root context and registers dispatcher servlet
 * Spring scans for initializers automatically
 */
public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

  public void onStartup(ServletContext servletContext) throws ServletException {
    super.onStartup(servletContext);
    servletContext.addListener(new IntrospectorCleanupListener());
  }

  protected String[] getServletMappings() {
    return new String[]{"/"};
  }

  @Override
  protected Class<?>[] getRootConfigClasses() {
    return new Class[]{AppConfig.class};
  }

  @Override
  protected Class<?>[] getServletConfigClasses() {
    return new Class[0];
  }
}