Spring MVC: Controller does not run in an ApplicationContext

Question

I am trying to implement a WebApp using Spring MVC Framework. So far, HelloWorld wasn't a problem. Now I wanted to read in some Data from a database. To do so, I implemente a class called DataProvider which handles the database access.

Now I added this DataProvider class to my HelloWorld class, which is my Controller here. As soon as I do that, i get the following exception:

java.lang.IllegalStateException: ApplicationObjectSupport instance [de.bpm.keza.ui.srv.kennzahlen.controller.HelloController@7361b599] does not run in an ApplicationContext

Here is my Dispatcher-Servlet:

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="

       http://www.springframework.org/schema/beans     
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-3.0.xsd">

   <context:component-scan base-package="de.bpm.keza.ui.srv.kennzahlen" />

   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name="prefix" value="/WEB-INF/templates/" />
      <property name="suffix" value=".jsp" />
   </bean>

    <!-- Externe Konfigurationsdateien -->
    <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
        <property name="jndiName"  value="jdbc/BPM_KORE_ALIAS"/>
    </bean>

    <!-- DataProvider -->
    <bean id="dataProvider" class="de.bpm.keza.ui.srv.kennzahlen.data.DataProvider">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>

    <!-- KEZA Dashboard -->
    <property name="koreVorgaengeGesamtDataSql">
            <value>
                select 
                    *
                from DE_BPM_KORE_DBRD
            </value>
    </property>
    </bean>

</beans>

here is my HelloController.java

@Controller
public class HelloController extends WebContentGenerator {


    DataProvider daPro = ((DataProvider) getWebApplicationContext().getBean("dataProvider", DataProvider.class));

   @RequestMapping("/hello")
    public ModelAndView helloWorld() {
        String message = "Hello World, Spring 3.0!";
        return new ModelAndView("hello", "message", message);
    }

   @RequestMapping("/bye")
    public ModelAndView byeWorld() {
        String message = "Goodbye World, Spring 3.0!";

//          daPro.getVorgaengeGesamtByArkNr();

        return new ModelAndView("hello", "message", message);
    }

}

What am i doing wrong here?

You're missing the whole point of Spring: it's a dependency injection framework. You should just have @Autowired private DataProvider dataProvider; in your controller. Spring will inject the DataProvider bean into the controller. I suggest you find a recent tutorial about Spring, which doesn't use the old XML way of defining beans, but uses annotations and Java configuration instead. — JB Nizet
– JB Nizet, Commented Jul 14, 2015 at 12:41
I think you are missing to define Controller in dispatcher-servlet.xml — Vishal Zanzrukia
– Vishal Zanzrukia, Commented Jul 14, 2015 at 12:42
You may consider checking out projects.spring.io/spring-data-jpa for some pretty nifty JPA interfaces that can make interacting with data sources in Spring MVC. spring.io/guides/gs/accessing-data-jpa has Maven and Gradle configuration instructions for Spring Data JPA that you may be able to utilize. — Alexander Staroselsky
– Alexander Staroselsky, Commented Jul 14, 2015 at 12:49
Most of the tutorials do the XML way. At least a dispatcherServlet which configures the viewresolver etc. I cant use Mavon or Gradle, which all other tutorials do use. — Tobias Kuess
– Tobias Kuess, Commented Jul 14, 2015 at 12:49
Remove extends WebContextGenerator and the ugly way to get the DataProvider just add @Autowired to the daPro field. — M. Deinum
– M. Deinum, Commented Jul 14, 2015 at 12:52

Ranjith Kumar · Accepted Answer · 2015-07-15 06:52:44Z

1

You have two ways for accessing that bean.

DataProvider daPro = ((DataProvider) getWebApplicationContext().getBean("dataProvider", DataProvider.class));

Replace the Above Code with

DataProvider dataProvider;

Or

@Autowired
DataProvider dataProvider;

answered Jul 15, 2015 at 6:52

Ranjith Kumar

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