Grails spring bean setup for shib auth

gistfile1.groovy

beans = {
    userDetailsServiceWrapper(org.springframework.security.core.userdetails.UserDetailsByNameServiceWrapper) {
        userDetailsService = ref('userDetailsService')
    }
    
    preauthAuthenticationProvider(org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationProvider) {
        preAuthenticatedUserDetailsService = ref('userDetailsServiceWrapper')
    }
    
    shibAuthFilter(org.springframework.security.web.authentication.preauth.RequestHeaderAuthenticationFilter) {
        principalRequestHeader = 'eppn' //this is the shib header that contains the user ID
        checkForPrincipalChanges = true
        invalidateSessionOnPrincipalChange = true
        continueFilterChainOnUnsuccessfulAuthentication = false
        authenticationManager = ref('authenticationManager')
    }
    
    //needed for mock authentication on local dev tier   
    mockTestFilter(com.example.test.util.MockRequestHeaderAuthenticationFilter) {
        mockPrincipal = 'test' //Change this if you want to log in as a different user
        checkForPrincipalChanges = true
        invalidateSessionOnPrincipalChange = true
        continueFilterChainOnUnsuccessfulAuthentication = false
        authenticationManager = ref('authenticationManager')
    }
}