Another SecurityContextHolder.getContext().getAuthenticati on()==null problem

[igorg]

I've found several thread written by people, that tried to get user details and got null. But I havn't find answer situable to my case.
I have an application that working with GWT and Spring. In new version my boss wanted to Integrate it with accegi login and password encryption. I did it, and now my application open html+JavaScript page, compiled from Java with GWT, only after acegi login.
Now, I have another problem. My program need to know what user logged in. I wrote simple function at server side , that just call to SecurityContextHolder.getContext().getAuthenticati on() and returns principal username, but it doesn't work.
I saw in debugger that function is called from client side, but getAuthentication() returns null.
It seems strange, because the call is done after successful login. Is anybody know , how to solve it?

my function fails at block code that same to code in 2.2 of acegi documentation:

public synchronized Employe getCurrentEmploye() {
        Object obj =
                SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        String username;
if ( obj instanceof UserDetails ) {
            username= ( (UserDetails)obj ).getUsername();
        } else {
            username = obj.toString();
        }

        return
                username!=null ?
                        employeDao.findByUsername( username ) :
                        null;
    }

acegi configuration :

<beans>
	<bean id="httpSessionContextIntegrationFilter" class="org.acegisecurity.context.HttpSessionContextIntegrationFilter"/>

    <bean id="authenticationProcessingFilter" class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">
		<property name="authenticationManager" ref="authenticationManager"/>
		<property name="authenticationFailureUrl" value="/gwt/login_error.html"/>
		<property name="defaultTargetUrl" value="/"/>
		<property name="filterProcessesUrl" value="/gwt/j_acegi_security_check"/>
		<property name="rememberMeServices" ref="rememberMeServices"/>
	</bean>

    <bean id="exceptionTranslationFilter" class="org.acegisecurity.ui.ExceptionTranslationFilter">
		<property name="authenticationEntryPoint">
			<bean class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
				<property name="loginFormUrl" value="/gwt/acegilogin.html"/>
				<property name="forceHttps" value="false"/>
			</bean>
		</property>
	</bean>

    <bean id="filterInvocationInterceptor" class="org.acegisecurity.intercept.web.FilterSecurityInterceptor">
		<property name="authenticationManager" ref="authenticationManager"/>
		<property name="accessDecisionManager">
			<bean class="org.acegisecurity.vote.AffirmativeBased">
				<property name="allowIfAllAbstainDecisions" value="false"/>
				<property name="decisionVoters">
					<list>
						<bean class="org.acegisecurity.vote.RoleVoter"/>
						<bean class="org.acegisecurity.vote.AuthenticatedVoter"/>
					</list>
				</property>
			</bean>
		</property>
		<property name="objectDefinitionSource">
            <!-- -->
            <value><![CDATA[
			    CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
				PATTERN_TYPE_APACHE_ANT
				/gwt/j_acegi_security_check=ROLE_ANONYMOUS,ROLE_ADMIN,ROLE_SECTION_MANAGER,ROLE_USER
				/gwt/login_error.html=ROLE_ANONYMOUS,ROLE_ADMIN,ROLE_SECTION_MANAGER,ROLE_USER
				/gwt/acegilogin.html=ROLE_ANONYMOUS,ROLE_ADMIN,ROLE_SECTION_MANAGER,ROLE_USER
				/gwt/logo.png=ROLE_ANONYMOUS,ROLE_ADMIN,ROLE_SECTION_MANAGER,ROLE_USER
				/gwt/**=ROLE_ADMIN,ROLE_SECTION_MANAGER,ROLE_USER,IS_AUTHENTICATED_REMEMBERED 
			]]></value>
		</property>
	</bean>

    <bean id="authenticationManager" class="org.acegisecurity.providers.ProviderManager">
		<property name="providers">
			<list>
				<ref local="daoAuthenticationProvider"/>
				<bean class="org.acegisecurity.providers.anonymous.AnonymousAuthenticationProvider">
					<property name="key" value="changeThis"/>
				</bean>
				<bean class="org.acegisecurity.providers.rememberme.RememberMeAuthenticationProvider">
					<property name="key" value="changeThis"/>
				</bean>
			</list>
		</property>
	</bean>

    <bean id="daoAuthenticationProvider" class="org.acegisecurity.providers.dao.DaoAuthenticationProvider">
		<property name="userDetailsService" ref="userDetailsDaoService"/>
        <property name="passwordEncoder" ref="passwordEncoder" />
    </bean>

</beans>

web.xml :

            <servlet>
                <servlet-name>spring</servlet-name>
                <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
                <load-on-startup>-1</load-on-startup>
            </servlet>

            <servlet>
                <servlet-name>ERService</servlet-name>
                <servlet-class>il.co.entrypoint.service.ERServiceImpl</servlet-class>
            </servlet>

            <servlet-mapping>
                <servlet-name>spring</servlet-name>
                <url-pattern>/async/*</url-pattern>
            </servlet-mapping>

            <!-- http://static.springframework.org/spring/docs/2.0.x/reference/beans.html#beans-factory-scopes-other-web-configuration -->
            <listener>
                <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
            </listener>

            <!-- http://static.springframework.org/spring/docs/2.0.x/reference/beans.html#context-create -->
            <listener>
                <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
            </listener>

            <filter>
              <filter-name>Acegi Filter Chain Proxy</filter-name>
              <filter-class>org.acegisecurity.util.FilterToBeanProxy</filter-class>
              <init-param>
                <param-name>targetClass</param-name>
                <param-value>org.acegisecurity.util.FilterChainProxy</param-value>
              </init-param>
            </filter>

            <filter>
                <filter-name>requestContextFilter</filter-name>
                <filter-class>org.springframework.web.filter.RequestContextFilter</filter-class>
            </filter>

            <filter>
                <filter-name>openSessionInView</filter-name>
                <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
            </filter>

           <filter-mapping>
                <filter-name>Acegi Filter Chain Proxy</filter-name>
                <url-pattern>/gwt/*</url-pattern>
           </filter-mapping>

            <filter-mapping>
                <filter-name>requestContextFilter</filter-name>
                <url-pattern>/gwt/*</url-pattern>
                <url-pattern>/files/*</url-pattern>
            </filter-mapping>

            <filter-mapping>
                <filter-name>openSessionInView</filter-name>
                <servlet-name>ERService</servlet-name>
                <dispatcher>REQUEST</dispatcher>
                <dispatcher>FORWARD</dispatcher>
                <dispatcher>INCLUDE</dispatcher>
            </filter-mapping>

[igorg]

Sorry about creatin new thread. I've working about this problem 10 hours and two minutes after I've posted it I solve this problem. It was becausein web.xml all GAT-Ajax requests have url pattern /async/* and this pattern was not included in Acegi Filter Chain mapping.