include/private/redis/asynccommanddispatcher.hpp

   1 /*
   2    Copyright (c) 2018-2019 Nokia.
   3
   4    Licensed under the Apache License, Version 2.0 (the "License");
   5    you may not use this file except in compliance with the License.
   6    You may obtain a copy of the License at
   7
   8        http://www.apache.org/licenses/LICENSE-2.0
   9
  10    Unless required by applicable law or agreed to in writing, software
  11    distributed under the License is distributed on an "AS IS" BASIS,
  12    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13    See the License for the specific language governing permissions and
  14    limitations under the License.
  15 */
  16
  17 /*
  18  * This source code is part of the near-RT RIC (RAN Intelligent Controller)
  19  * platform project (RICP).
  20 */
  21
  22 #ifndef SHAREDDATALAYER_REDIS_ASYNCCOMMANDDISPATCHER_HPP_
  23 #define SHAREDDATALAYER_REDIS_ASYNCCOMMANDDISPATCHER_HPP_
  24
  25 #include <functional>
  26 #include <system_error>
  27 #include <string>
  28 #include <memory>
  29 #include <vector>
  30 #include "private/asyncconnection.hpp"
  31 #include "private/logger.hpp"
  32
  33 namespace shareddatalayer
  34 {
  35     class Engine;
  36     namespace redis
  37     {
  38         class ContentsBuilder;
  39         class Reply;
  40         struct Contents;
  41         struct DatabaseInfo;
  42
  43         class AsyncCommandDispatcher
  44         {
  45         public:
  46             AsyncCommandDispatcher(const AsyncCommandDispatcher&) = delete;
  47
  48             AsyncCommandDispatcher& operator = (const AsyncCommandDispatcher&) = delete;
  49
  50             virtual ~AsyncCommandDispatcher() = default;
  51
  52             using ConnectAck = std::function<void()>;
  53
  54             virtual void waitConnectedAsync(const ConnectAck& connectAck) = 0;
  55
  56             // NOTE: If there are connections open to several database instances, callback
  57             // does not identify that which one was disconnected.
  58             using DisconnectCb = std::function<void()>;
  59
  60             virtual void registerDisconnectCb(const DisconnectCb& disconnectCb) = 0;
  61
  62             using CommandCb = std::function<void(const std::error_code&, const Reply&)>;
  63
  64             virtual void dispatchAsync(const CommandCb& commandCb,
  65                                        const AsyncConnection::Namespace& ns,
  66                                        const Contents& contents) = 0;
  67
  68             virtual void disableCommandCallbacks() = 0;
  69
  70             static std::shared_ptr<AsyncCommandDispatcher> create(Engine& engine,
  71                                                                   const DatabaseInfo& databaseInfo,
  72                                                                   std::shared_ptr<ContentsBuilder> contentsBuilder,
  73                                                                   bool usePermanentCommandCallbacks,
  74                                                                   std::shared_ptr<Logger> logger,
  75                                                                   bool usedForSentinel);
  76
  77         protected:
  78             AsyncCommandDispatcher() = default;
  79         };
  80     }
  81 }
  82
  83 #endif