Estou trabalhando em um projeto usando o Spring 3 e o Spring Security. Meu problema é com o contêiner de IoC. Problema iniciado quando escrevi minha própria implementação deUserDetailsService para Spring Security-3. Verifiquei as outras perguntas, mas ainda não consegui resolver o problem

A definição do problema é:

Tenho duas classes separadas (uma éUsersController.java que se estende@Controller eProjectUserDetailsService que se estende@Service) que usa um objeto comum para ser conectado automaticamente. Mas enquanto o objeto é conectado automaticamente com êxito emUsersController, isto énull emProjectUserDetailsService classe apesar do objeto desta classe ProjectUserDetailsService) foi criado com sucesso (verifiquei isso depurando

Alguma sugestão de como resolver isso?

Aqui estão minhasweb.xml, project-servlet.xml eproject-security.xml arquivos e classes relacionada

Web.xml`

<?xml version="1.0" encoding="UTF-8"?>
<!--
  - Tutorial web application
  -
  -->
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>Ecognitio with Spring Security</display-name>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
            /WEB-INF/ecognitio-servlet.xml
            /WEB-INF/ecognitio-security.xml
        </param-value>
  </context-param>
  <context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>tutorial.root</param-value>
  </context-param>
  <filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.security.web.session.HttpSessionEventPublisher</listener-class>
  </listener>
  <servlet>
    <servlet-name>ecognitio</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>project</servlet-name>
    <url-pattern>*.action</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>project</servlet-name>
    <url-pattern>*.html</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

project-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:p="http://www.springframework.org/schema/p"
    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
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <!-- Scans the classpath of this application for @Components to deploy as beans -->
    <context:component-scan base-package="com.project" />

    <!-- Configures the @Controller programming model -->
    <mvc:annotation-driven />

     <bean  id="messageSource" 
            class="org.springframework.context.support.ResourceBundleMessageSource"
            p:basename="Messages"/>

  <!-- misc -->
<!--    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="suffix" value=".jsp"/>
    </bean>  --> 


    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">

       <property name="viewClass">
         <value>
              org.springframework.web.servlet.view.tiles2.TilesView
            </value>
        </property>
    </bean>

    <bean id="tilesConfigurer"
    class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
      <property name="definitions">
             <list>
                <value>/WEB-INF/tiles.xml</value>
             </list>
      </property>
    </bean>

    <!-- Configures Hibernate - Database Config -->
    <import resource="db-config.xml" />
</beans>

project-security.xml

<?xml version="1.0" encoding="UTF-8"?>

<!--
  - Sample namespace-based configuration
  -
  -->

<beans:beans xmlns="http://www.springframework.org/schema/security"
    xmlns:beans="http://www.springframework.org/schema/beans"
    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/security http://www.springframework.org/schema/security/spring-security-3.1.xsd">

    <debug />

    <global-method-security pre-post-annotations="enabled">
        <!-- AspectJ pointcut expression that locates our "post" method and applies security that way
        <protect-pointcut expression="execution(* bigbank.*Service.post*(..))" access="ROLE_TELLER"/>
        -->
    </global-method-security>

    <http pattern="/loggedout.jsp" security="none"/>

    <http use-expressions="true" >
        <intercept-url pattern="/secure/extreme/**" access="hasRole('ROLE_SUPERVISOR')"/>
        <intercept-url pattern="/secure/**" access="isAuthenticated()" />

        <!--
             Allow all other requests. In a real application you should
             adopt a whitelisting approach where access is not allowed by default
          -->
        <intercept-url pattern="/login.jsp*" access="isAuthenticated()==false"/>
        <intercept-url pattern="/timeout.jsp*" access="isAuthenticated()==false"/>
        <intercept-url pattern="/**" access="hasRole('ROLE_USER')" />

       <!-- <intercept-url pattern="/**" access="permitAll" /> --> 
        <form-login login-page="/login.jsp" authentication-failure-url="/login.jsp?login_error=1" default-target-url="/dashboard.html" />
        <logout logout-success-url="/login.jsp" delete-cookies="JSESSIONID"/>
        <remember-me />
<!--
    Uncomment to enable X509 client authentication support
        <x509 />
-->
        <!-- Uncomment to limit the number of sessions a user can have 
        <session-management invalid-session-url="/login.jsp">
            <concurrency-control max-sessions="1" error-if-maximum-exceeded="true" />
        </session-management>
        -->

    </http>

            <!-- HERE IS WHERE I USE an object of ProjectUserDetailsService -->
    <authentication-manager>
         <authentication-provider user-service-ref="userDetailsService" />   
    </authentication-manager>


 <!--  

</beans:beans>

UsersController.java (a fiação automática de um objeto da classe UsersDAO é bem-sucedida para esta classe)

package com.project.users;

//required imports



@Controller
public class UsersControllers
{

@Autowired
private UsersDAO usersDAO;

    //Some more autowires and some class specific code


}

ProjectUserDetailsService.java (onde a fiação automática do UsersDAO não funciona)

package com.project.security;

import java.util.ArrayList;
import java.util.Collection;

//required imports


@SuppressWarnings("deprecation")
@Service("userDetailsService") 
public class ProjectUserDetailsService implements UserDetailsService {

   @Autowired
   private UsersDAO usersDAO;
  @Autowired private Assembler assembler;

  @Transactional(readOnly = true)
  public UserDetails loadUserByUsername(String username)
      throws UsernameNotFoundException, DataAccessException {

    UserDetails userDetails = null;
    //For debugging purposes
    if(usersDAO==null){
        System.out.println("DAO IS NULL");
        System.out.println("DAO IS NULL");
        System.out.println("DAO IS NULL");

    }
    User userEntity = usersDAO.findUserbyEmail("'"+username+"'");


    if (userEntity == null)
      throw new UsernameNotFoundException("user not found");

    return assembler.buildUserFromUserEntity(userEntity);

  }
}