17:20:50,044 ERROR [org.springframework.web.context.ContextLoader] (MSC service thread 1-1) Context initialization failed: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMapppingContext'
: Cannot create inner bean '(inner bean)#133b432c' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] 
while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationExc
eption: Error creating bean with name '(inner bean)#133b432c': Cannot resolve reference to bean 'entityManagerFactory' 
while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionE
xception: No bean named 'entityManagerFactory' is defined

@Configuration
@ComponentScan(basePackageClasses = ApplicationInitializer.class)
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "com.jdev.blog.admin.crud.repositories", entityManagerFactoryRef = "entityManagerFactory")
public class ApplicationConfiguration {

}

package com.jdev.blog.admin;

import java.util.Properties;

import javax.annotation.Resource;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
import javax.sql.DataSource;

import org.hibernate.jpa.HibernatePersistenceProvider;
import org.springframework.context.annotation.Bean;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextCleanupListener;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.request.RequestContextListener;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;

import com.jdev.blog.admin.config.ApplicationConfiguration;
import com.vaadin.server.VaadinServlet;

public class ApplicationInitializer implements WebApplicationInitializer {
	
    private static final String PROPERTY_NAME_DATABASE_DRIVER = "db.driver";
    private static final String PROPERTY_NAME_DATABASE_PASSWORD = "db.password";
    private static final String PROPERTY_NAME_DATABASE_URL = "db.url";
    private static final String PROPERTY_NAME_DATABASE_USERNAME = "db.username";
 
    private static final String PROPERTY_NAME_HIBERNATE_DIALECT = "hibernate.dialect";
    private static final String PROPERTY_NAME_HIBERNATE_SHOW_SQL = "hibernate.show_sql";
 
    @Resource
    private Environment env;

	@Override
	public void onStartup(ServletContext servletContext) throws ServletException {
		
		AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();

		rootContext.register(ApplicationConfiguration.class);
		registerSpringContextLoaderListener(servletContext, rootContext);
		registerVaadinServlet(servletContext, rootContext);
	}

	private void registerVaadinServlet(ServletContext servletContext, AnnotationConfigWebApplicationContext rootContext) {

		VaadinServlet vaadinServlet = new VaadinServlet();
		ServletRegistration.Dynamic vaadinServletRegistration = servletContext.addServlet("vaadinServlet",
				vaadinServlet);
		vaadinServletRegistration.setInitParameter("ui", AdminPanelMain.class.getName());
		vaadinServletRegistration.setInitParameter("UIProvider", SpringUIProvider.class.getName());
		vaadinServletRegistration.setLoadOnStartup(1);
		vaadinServletRegistration.addMapping("/*");

	}

	private void registerSpringContextLoaderListener(ServletContext servletContext,
			AnnotationConfigWebApplicationContext rootContext) {
		servletContext.addListener(new ContextLoaderListener(rootContext));
		servletContext.addListener(new ContextCleanupListener());
		servletContext.addListener(new RequestContextListener());
	}
	
    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
 
        dataSource.setDriverClassName(env.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER));
        dataSource.setUrl(env.getRequiredProperty(PROPERTY_NAME_DATABASE_URL));
        dataSource.setUsername(env.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME));
        dataSource.setPassword(env.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD));
 
        return dataSource;
    }
 
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource());
        entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
         
        entityManagerFactoryBean.setJpaProperties(hibProperties());
         
        return entityManagerFactoryBean;
    }
 
    private Properties hibProperties() {
        Properties properties = new Properties();
        properties.put(PROPERTY_NAME_HIBERNATE_DIALECT, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_DIALECT));
        properties.put(PROPERTY_NAME_HIBERNATE_SHOW_SQL, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_SHOW_SQL));
        return properties;
    }
 
    @Bean
    public JpaTransactionManager transactionManager() {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
        return transactionManager;
    }
}