java - Spring Custom Authentication Manager -

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i using spring security authenticating users. have implemented custom authentication manager credentials , name blank in authentication manager

here security xml 

<security:http auto-config="false" entry-point-ref="authenticationentrypoint">     <security:custom-filter position="concurrent_session_filter"         ref="concurrencyfilter" />     <security:custom-filter ref="authenticationfilter"         position="form_login_filter" />     <!-- <security:custom-filter after="concurrent_session_filter"         ref="securefilter" /> -->     <security:session-management         session-authentication-strategy-ref="sas" />  </security:http>  <bean id="authenticationfilter"     class="org.springframework.security.web.authentication.usernamepasswordauthenticationfilter"     p:authenticationmanager-ref="ahcauthenticationmanager"     p:authenticationfailurehandler-ref="customauthenticationfailurehandler"     p:authenticationsuccesshandler-ref="customauthenticationsuccesshandler"     p:sessionauthenticationstrategy-ref="sas">

here authentication manager code

public class ahcauthenticationmanager implements authenticationmanager {  private userinfoservice userinfoservice;  public ahcauthenticationmanager(userinfoservice userinfoservice) {     this.userinfoservice = userinfoservice; }  public authentication authenticate(authentication arg)         throws authenticationexception {     system.out.println(arg.getname());     if (userinfoservice.authenticateuser(arg.getname(), arg             .getcredentials().tostring())) {         return new usernamepasswordauthenticationtoken(arg.getprincipal(),                 arg.getcredentials());     }     return null;  }

}

the sysout in manager code return empty using jsf client side , in managed bean inside request can see parameters in request parametermap idea might going wrong ?

thanks


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