sets the name of the current user and stores it in the current session . using a null username will remove the username from the session . concode_field_sep String CURRENT_USER_SESSION_ATTRIBUTE_KEY concode_field_sep String get concode_elem_sep VaadinRequest getCurrentRequest
void function ( String arg0 ) { if ( arg0 == null ) { getCurrentRequest ( ) . getWrappedSession ( ) . removeAttribute ( CURRENT_USER_SESSION_ATTRIBUTE_KEY ) ; } else { getCurrentRequest ( ) . getWrappedSession ( ) . setAttribute ( CURRENT_USER_SESSION_ATTRIBUTE_KEY , arg0 ) ; } }