static String getUrlBase(HttpRequest req, HttpListConfigsRequest listReq, ApplicationId appId, Zone zone) {
        if (listReq.isFullAppId())
            return Utils.getUrlBase(req,
                    Path.fromString("/config/v2/tenant/").
                    append(appId.tenant().value()).
                    append("application").
                    append(appId.application().value()).
                    append("environment").
                    append(zone.environment().value()).
                    append("region").
                    append(zone.region().value()).
                    append("instance").
                    append(appId.instance().value()).getAbsolute()+"/");
        else
            return Utils.getUrlBase(req,
                    Path.fromString("/config/v2/tenant/").
                    append(appId.tenant().value()).
                    append("application").
                    append(appId.application().value()).getAbsolute()+"/");
    }
Handler for a list configs operation. Lists all configs in model for a given application and tenant.

@author vegardh
@since 5.3
configserver/src/main/java/com/yahoo/vespa/config/server/http/v2/HttpListConfigsHandler.java