I'm not able to find AuthenticationProcessingFilter when migrating from Spring 2 to Spring 3 (using spring-core)
AuthenticationProcessingFilter
Spring 2
Spring 3
This class has been renamed to UsernamePasswordAuthenticationFilter in Spring security 3.x.
ref : http://static.springsource.org/spring-security/site/docs/3.0.x/apidocs/org/springframework/security/web/authentication/AuthenticationProcessingFilter.html