Add first version

[ric-plt/sdl.git] / include / private / redis / asynchirediscommanddispatcher.hpp

diff --git a/include/private/redis/asynchirediscommanddispatcher.hpp b/include/private/redis/asynchirediscommanddispatcher.hpp
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+/*
+   Copyright (c) 2018-2019 Nokia.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+#ifndef SHAREDDATALAYER_REDIS_ASYNCHIREDISCOMMANDDISPATCHER_HPP_
+#define SHAREDDATALAYER_REDIS_ASYNCHIREDISCOMMANDDISPATCHER_HPP_
+
+#include "private/redis/asynccommanddispatcher.hpp"
+#include <string>
+#include <list>
+#include <vector>
+#include <map>
+#include <memory>
+#include <queue>
+#include "private/logger.hpp"
+#include "private/timer.hpp"
+
+extern "C"
+{
+    struct redisReply;
+    struct redisAsyncContext;
+}
+
+namespace shareddatalayer
+{
+    class Engine;
+
+    namespace redis
+    {
+        class HiredisSystem;
+        class HiredisEpollAdapter;
+        class Reply;
+
+        class AsyncHiredisCommandDispatcher: public AsyncCommandDispatcher
+        {
+        public:
+            AsyncHiredisCommandDispatcher(const AsyncHiredisCommandDispatcher&) = delete;
+
+            AsyncHiredisCommandDispatcher& operator = (const AsyncHiredisCommandDispatcher&) = delete;
+
+            AsyncHiredisCommandDispatcher(Engine& engine,
+                                          const std::string& address,
+                                          uint16_t port,
+                                          std::shared_ptr<ContentsBuilder> contentsBuilder,
+                                          bool usePermanentCommandCallbacks,
+                                          std::shared_ptr<Logger> logger);
+
+            AsyncHiredisCommandDispatcher(Engine& engine,
+                                          const std::string& address,
+                                          uint16_t port,
+                                          std::shared_ptr<ContentsBuilder> contentsBuilder,
+                                          bool usePermanentCommandCallbacks,
+                                          HiredisSystem& hiredisSystem,
+                                          std::shared_ptr<HiredisEpollAdapter> adapter,
+                                          std::shared_ptr<Logger> logger);
+
+            ~AsyncHiredisCommandDispatcher() override;
+
+            void waitConnectedAsync(const ConnectAck& connectAck) override;
+
+            void registerDisconnectCb(const DisconnectCb& disconnectCb) override;
+
+            void dispatchAsync(const CommandCb& commandCb, const AsyncConnection::Namespace& ns,
+                               const Contents& contents) override;
+
+            void disableCommandCallbacks() override;
+
+            void setConnected();
+
+            void setDisconnected();
+
+            void handleReply(const CommandCb& commandCb,
+                             const std::error_code& error,
+                             const redisReply* rr);
+
+            bool isClientCallbacksEnabled() const;
+
+            void verifyConnection();
+
+            void disconnectHiredis();
+
+            void armConnectionRetryTimer(Timer::Duration duration,
+                                         std::function<void()> retryAction);
+
+        private:
+            enum class ServiceState
+            {   DISCONNECTED,
+                CONNECTION_VERIFICATION,
+                CONNECTED
+            };
+
+            using Callback = std::function<void(const Reply&)>;
+
+            Engine& engine;
+            std::string address;
+            uint16_t port;
+            std::shared_ptr<ContentsBuilder> contentsBuilder;
+            bool usePermanentCommandCallbacks;
+            HiredisSystem& hiredisSystem;
+            std::shared_ptr<HiredisEpollAdapter> adapter;
+            redisAsyncContext* ac;
+            ConnectAck connectAck;
+            DisconnectCb disconnectCallback;
+            ServiceState serviceState;
+            std::list<CommandCb> cbs;
+            bool clientCallbacksEnabled;
+            Timer connectionRetryTimer;
+            Timer::Duration connectionRetryTimerDuration;
+            Timer::Duration connectionVerificationRetryTimerDuration;
+            std::shared_ptr<Logger> logger;
+
+            void connect();
+
+            bool isValidCb(const CommandCb& commandCb);
+
+            void removeCb(const CommandCb& commandCb);
+
+            void callCommandCbWithError(const CommandCb& commandCb, const std::error_code& error);
+
+            void dispatchAsync(const CommandCb& commandCb, const Contents& contents, bool checkConnectionState);
+
+            void verifyConnectionReply(const std::error_code& error, const redis::Reply& reply);
+        };
+    }
+}
+
+#endif