Add Redis Sentinel based database discovery

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

diff --git a/include/private/redis/asyncsentineldatabasediscovery.hpp b/include/private/redis/asyncsentineldatabasediscovery.hpp
new file mode 100644 (file)
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+++ b/include/private/redis/asyncsentineldatabasediscovery.hpp
@@ -0,0 +1,85 @@
+/*
+   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_ASYNCSENTINELDATABASEDISCOVERY_HPP_
+#define SHAREDDATALAYER_REDIS_ASYNCSENTINELDATABASEDISCOVERY_HPP_
+
+#include <functional>
+#include <system_error>
+#include "private/redis/asyncdatabasediscovery.hpp"
+#include "private/redis/databaseinfo.hpp"
+#include "private/logger.hpp"
+#include "private/timer.hpp"
+
+namespace shareddatalayer
+{
+    namespace redis
+    {
+        class AsyncCommandDispatcher;
+        struct Contents;
+        class ContentsBuilder;
+        class Reply;
+    }
+
+    class Engine;
+
+    namespace redis
+    {
+        class AsyncSentinelDatabaseDiscovery: public AsyncDatabaseDiscovery
+        {
+        public:
+            using AsyncCommandDispatcherCreator = std::function<std::shared_ptr<redis::AsyncCommandDispatcher>(Engine& engine,
+                                                                                                               const redis::DatabaseInfo& databaseInfo,
+                                                                                                               std::shared_ptr<redis::ContentsBuilder> contentsBuilder,
+                                                                                                               std::shared_ptr<Logger> logger)>;
+
+            AsyncSentinelDatabaseDiscovery(const AsyncSentinelDatabaseDiscovery&) = delete;
+
+            AsyncSentinelDatabaseDiscovery& operator = (const AsyncSentinelDatabaseDiscovery&) = delete;
+
+            AsyncSentinelDatabaseDiscovery(std::shared_ptr<Engine> engine,
+                                           std::shared_ptr<Logger> logger);
+
+            AsyncSentinelDatabaseDiscovery(std::shared_ptr<Engine> engine,
+                                           std::shared_ptr<Logger> logger,
+                                           const AsyncCommandDispatcherCreator& asyncCommandDispatcherCreator,
+                                           std::shared_ptr<redis::ContentsBuilder> contentsBuilder);
+
+            ~AsyncSentinelDatabaseDiscovery() override = default;
+
+            void setStateChangedCb(const StateChangedCb& stateChangedCb) override;
+
+            void clearStateChangedCb() override;
+
+            void setConnected(bool state);
+        private:
+            std::shared_ptr<Engine> engine;
+            std::shared_ptr<Logger> logger;
+            StateChangedCb stateChangedCb;
+            DatabaseInfo databaseInfo;
+            std::shared_ptr<redis::AsyncCommandDispatcher> dispatcher;
+            std::shared_ptr<redis::ContentsBuilder> contentsBuilder;
+            Timer masterInquiryRetryTimer;
+            Timer::Duration masterInquiryRetryTimerDuration;
+
+            void sendMasterInquiry();
+
+            void masterInquiryAck(const std::error_code& error, const Reply& reply);
+        };
+    }
+}
+
+#endif