cobra to statsd bot ported to windows + add unittest

ixbots/ixbots/IXStatsdClient.h

@@ -0,0 +1,62 @@
+/*
+ *  IXStatsdClient.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2020 Machine Zone, Inc. All rights reserved.
+ */
+
+#pragma once
+
+#include <ixwebsocket/IXNetSystem.h>
+#include <ixwebsocket/IXUdpSocket.h>
+
+#include <string>
+#include <thread>
+#include <deque>
+#include <mutex>
+#include <atomic>
+
+namespace ix {
+
+    class StatsdClient {
+    public:
+        StatsdClient(const std::string& host="127.0.0.1",
+                     int port=8125,
+                     const std::string& prefix = "");
+        ~StatsdClient();
+
+        bool init(std::string& errMsg);
+        int inc(const std::string& key);
+        int dec(const std::string& key);
+        int count(const std::string& key, size_t value);
+        int gauge(const std::string& key, size_t value);
+        int timing(const std::string& key, size_t ms);
+
+    private:
+        /**
+         * (Low Level Api) manually send a message
+         * which might be composed of several lines.
+         */
+        int send(const std::string& message);
+
+        /* (Low Level Api) manually send a message
+         * type = "c", "g" or "ms"
+         */
+        int send(std::string key, size_t value, const std::string& type);
+
+        void cleanup(std::string& key);
+
+        UdpSocket _socket;
+
+        std::string _host;
+        int _port;
+        std::string _prefix;
+
+        std::atomic<bool> _stop;
+        std::thread _thread;
+        std::mutex _mutex; // for the queue
+
+        std::deque<std::string> batching_message_queue_;
+        const uint64_t max_batching_size = 32768;
+    };
+
+} // end namespace ix