third-party/mcrouter/src/mcrouter/routes/AllSyncRouteFactory.h

   1 /*
   2  * Copyright (c) Meta Platforms, Inc. and affiliates.
   3  *
   4  * This source code is licensed under the MIT license found in the
   5  * LICENSE file in the root directory of this source tree.
   6  */
   7
   8 #pragma once
   9
  10 #include <folly/dynamic.h>
  11
  12 #include "mcrouter/lib/config/RouteHandleBuilder.h"
  13 #include "mcrouter/lib/config/RouteHandleFactory.h"
  14 #include "mcrouter/lib/routes/AllSyncRoute.h"
  15 #include "mcrouter/lib/routes/NullRoute.h"
  16
  17 namespace facebook {
  18 namespace memcache {
  19 namespace mcrouter {
  20
  21 namespace detail {
  22
  23 template <class RouterInfo>
  24 typename RouterInfo::RouteHandlePtr makeAllSyncRoute(
  25     std::vector<typename RouterInfo::RouteHandlePtr> rh) {
  26   if (rh.empty()) {
  27     return createNullRoute<typename RouterInfo::RouteHandleIf>();
  28   }
  29
  30   if (rh.size() == 1) {
  31     return std::move(rh[0]);
  32   }
  33
  34   return makeRouteHandle<typename RouterInfo::RouteHandleIf, AllSyncRoute>(
  35       std::move(rh));
  36 }
  37
  38 } // namespace detail
  39
  40 template <class RouterInfo>
  41 typename RouterInfo::RouteHandlePtr makeAllSyncRoute(
  42     RouteHandleFactory<typename RouterInfo::RouteHandleIf>& factory,
  43     const folly::dynamic& json) {
  44   std::vector<typename RouterInfo::RouteHandlePtr> children;
  45   if (json.isObject()) {
  46     if (auto jchildren = json.get_ptr("children")) {
  47       children = factory.createList(*jchildren);
  48     }
  49   } else {
  50     children = factory.createList(json);
  51   }
  52   return detail::makeAllSyncRoute<RouterInfo>(std::move(children));
  53 }
  54 } // namespace mcrouter
  55 } // namespace memcache
  56 } // namespace facebook