First commit

src/Model/HostRegistry.h

@@ -0,0 +1,19 @@
+#pragma once
+#include <map>
+#include <string>
+#include <mutex>
+#include "Metrics/Host.h"
+
+namespace Model
+{
+    class HostRegistry
+    {
+    public:
+        void update(const std::string &host, const Metrics::Host &m);
+        std::map<std::string, Metrics::Host> snapshot();
+
+    private:
+        std::map<std::string, Metrics::Host> hosts_;
+        std::mutex mutex_;
+    };
+} // namespace Model