2022-05-08 12:12:15 +00:00
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#pragma once
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#include <memory>
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#include <mutex>
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2022-05-12 19:19:11 +00:00
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#include <thread>
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2022-05-08 12:12:15 +00:00
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#include <nats.h>
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#include <base/types.h>
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#include <Poco/Logger.h>
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namespace DB
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{
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namespace Loop
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{
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static const UInt8 RUN = 1;
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static const UInt8 STOP = 2;
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}
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2022-05-09 20:16:11 +00:00
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using SubscriptionPtr = std::unique_ptr<natsSubscription, decltype(&natsSubscription_Destroy)>;
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2022-05-12 19:11:59 +00:00
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using LockPtr = std::unique_ptr<std::lock_guard<std::mutex>>;
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2022-05-09 20:16:11 +00:00
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2022-05-08 12:12:15 +00:00
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class NATSHandler
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{
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public:
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NATSHandler(uv_loop_t * loop_, Poco::Logger * log_);
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~NATSHandler();
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/// Loop for background thread worker.
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void startLoop();
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/// Loop to wait for small tasks in a non-blocking mode.
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/// Adds synchronization with main background loop.
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void iterateLoop();
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2022-05-12 19:11:59 +00:00
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LockPtr setThreadLocalLoop();
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2022-05-12 13:52:14 +00:00
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2022-05-08 12:12:15 +00:00
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void stopLoop();
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2022-05-09 20:16:11 +00:00
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void changeConnectionStatus(bool is_running);
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2022-05-08 12:12:15 +00:00
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bool connectionRunning() const { return connection_running.load(); }
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bool loopRunning() const { return loop_running.load(); }
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void updateLoopState(UInt8 state) { loop_state.store(state); }
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UInt8 getLoopState() { return loop_state.load(); }
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natsOptions * getOptions() { return opts; }
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private:
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uv_loop_t * loop;
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natsOptions * opts = nullptr;
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Poco::Logger * log;
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std::atomic<bool> connection_running, loop_running;
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std::atomic<UInt8> loop_state;
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std::mutex startup_mutex;
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};
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}
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