// TODO: implement rollback in case of suboperation failure
func (f *frontend) update(ef engine.Frontend, b *backend) error {
oldf := f.frontend
f.frontend = ef
if err := f.updateBackend(b); err != nil {
return err
}
if oldf.Route != ef.Route {
log.Infof("%v updating route from %v to %v", oldf.Route, ef.Route)
if err := f.mux.router.Handle(ef.Route, f.handler); err != nil {
return err
}
if err := f.mux.router.Remove(oldf.Route); err != nil {
return err
}
}
olds := oldf.HTTPSettings()
news := ef.HTTPSettings()
if !olds.Equals(news) {
if err := f.rebuild(); err != nil {
return err
}
}
return nil
}
