dúvidas ACEGI

Assuntos Gerais
#1

pessoal, bom dia!
é o seguinte, eu to tentando usar o acegi pela primeira vez,
bem eu acho q eu entendi o mecanismo de autenticação dele, mas na hora de implementar eu to esbarrando eu um problema.

aqui vai as minhas configurações:
web.xml:

<filter>
	  <filter-name>Acegi Authentication Processing Filter</filter-name>
	  <filter-class>org.acegisecurity.util.FilterToBeanProxy</filter-class>
	  <init-param>
	    <param-name>targetClass</param-name>
	    <param-value>org.acegisecurity.ui.webapp.AuthenticationProcessingFilter</param-value>
	  </init-param>
	</filter>
	
	<filter-mapping>
	  <filter-name>Acegi Authentication Processing Filter</filter-name>
	  <url-pattern>/*</url-pattern>
	</filter-mapping>

applicationContext.xml:

<bean id="filterChainProxy" class="org.acegisecurity.util.FilterChainProxy">
	  <property name="filterInvocationDefinitionSource">
	    <value>
	      CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
	      PATTERN_TYPE_APACHE_ANT
	      /**=httpSessionContextIntegrationFilter,logoutFilter,authenticationProcessingFilter,basicProcessingFilter,securityContextHolderAwareRequestFilter,rememberMeProcessingFilter,anonymousProcessingFilter,exceptionTranslationFilter,filterInvocationInterceptor,switchUserProcessingFilter
	    </value>
	  </property>
	</bean>
	
	<bean id="exceptionTranslationFilter" class="org.acegisecurity.ui.ExceptionTranslationFilter">
	  <property name="authenticationEntryPoint"><ref local="authenticationProcessingFilterEntryPoint"/></property>
	  <property name="accessDeniedHandler">
	    <bean class="org.acegisecurity.ui.AccessDeniedHandlerImpl">
	      <property name="errorPage" value="/accessDenied.jsp"/>
	    </bean>
	  </property>
	</bean>

	<bean id="authenticationProcessingFilterEntryPoint" class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
	  <property name="loginFormUrl"><value>/view/jsp/login.jsf</value></property>
	  <property name="forceHttps"><value>false</value></property>
	</bean>
	
	<bean id="authenticationProcessingFilter" class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">
	  <property name="authenticationManager"><ref bean="authenticationManager"/></property>
	  <property name="authenticationFailureUrl"><value>/</value></property>
	  <property name="defaultTargetUrl"><value>/view/jsp/aluno.jsf</value></property>
	  <property name="filterProcessesUrl"><value>/view/jsp/login.jsf</value></property>
	</bean> 
	
	<bean id="authenticationManager" class="org.acegisecurity.providers.ProviderManager">
	  <property name="providers">
	    <list>
	      <ref local="daoAuthenticationProvider"/>
	    </list>
	  </property>
	</bean>
	
	<bean id="daoAuthenticationProvider" class="org.acegisecurity.providers.dao.DaoAuthenticationProvider">
        <property name="userDetailsService" ref="userDetailsService"/>
        <property name="userCache">
            <bean class="org.acegisecurity.providers.dao.cache.EhCacheBasedUserCache">
                <property name="cache">
                    <bean class="org.springframework.cache.ehcache.EhCacheFactoryBean">
                        <property name="cacheManager">
                            <bean class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"/>
                        </property>
                        <property name="cacheName" value="userCache"/>
                    </bean>
                </property>
            </bean>
        </property>
    </bean>
    
    <bean id="userDetailsService" class="com.mcp.intranetAcademica.action.LoginAct"></bean>

e finalmente o método da classe em q eu implemento UserDetailsService:

public UserDetails loadUserByUsername(String arg0)
			throws UsernameNotFoundException, DataAccessException {
		
		GrantedAuthority authority = new Grupo("read");
		UserDetails newContext = new User("Yo", "yo yo", true, true, true, true, new GrantedAuthority[] { authority });
		
		return newContext;
	}

Ao dar o submit na página de login, está chegando no método loadUserByUserName trankilamente.
bem, pelo que eu entendi, era só ese método retornar o UserDetails devidamente preenchido que a autenticação aconteceria, mas ela esta sempre falhando e redirecionando para a página de login.
Alguém sabe o que pode estar faltando?

obrigado.

#2