Spring MVC, two instances of configuration instead of one

Question

I\'m starting to learn about Spring MVC. I\'m trying to get rid of all Spring XML configuration. Here is my web.xml:

Answer 1

The problem here is that you are using the same config for the servlet and the root context. Thats why you have two instance of the configuration. In Spring MVC, you have 2 contexts, the servlet context and the root context. The servlet context is for your controllers and the root context for your business objects and your services.

If you don't want to use XML, create two config classes. Something like this :

Root context :

@Configuration
@EnableTransactionManagement
@ComponentScan("pl.mbrnwsk.sklep")
public class AppConfiguration {

    public String hbm2ddl_auto = "update";

    public AppConfiguration(){
        System.out.println("AppConfiguration");
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName("org.hsqldb.jdbcDriver");
        ds.setUrl("jdbc:hsqldb:file:/SklepDB/");
        ds.setUsername("SA");
        ds.setPassword("");
        return ds;
    }

    @Bean
    public SessionFactory sessionFactory() {
        LocalSessionFactoryBuilder ss = new LocalSessionFactoryBuilder(dataSource());
        ss.scanPackages("pl.mbrnwsk.sklep.model");
        ss.setProperty("hibernate.show_sql", "true");
        ss.setProperty("hibernate.hbm2ddl.auto", hbm2ddl_auto);
        ss.setProperty("hibernate.dialect",
                "org.hibernate.dialect.HSQLDialect");
        return ss.buildSessionFactory();
    }

    @Bean
    public PlatformTransactionManager txManager(){
        return new HibernateTransactionManager(sessionFactory());   
    }
}

Servlet context :

@Configuration
@ComponentScan("pl.mbrnwsk.sklep.controller")
public class ServletConfiguration {

    public AppConfiguration(){
        System.out.println("ServletConfiguration");
    }

    @Bean
    public ViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
}

Web.xml :

      
      
          contextClass
          
              org.springframework.web.context.support.AnnotationConfigWebApplicationContext
          
      

      
      
          contextConfigLocation
          pl.mbrnwsk.sklep.config.AppConfiguration
      

      
      
          org.springframework.web.context.ContextLoaderListener
      

      
      
          dispatcher
          org.springframework.web.servlet.DispatcherServlet
          
          
              contextClass
              
                  org.springframework.web.context.support.AnnotationConfigWebApplicationContext
              
          
          
          
              contextConfigLocation
              pl.mbrnwsk.sklep.config.ServletConfiguration
          
      

      
      
          dispatcher
          /