add

+/**************************************************************************
+* file:              dmpservicenativeloader.h
+
+* Author:            wanzhongping
+* Date:              2020-12-31 17:10:36
+* Email:             zhongpingw@chinadci.com
+* copyright:         广州城市信息研究所有限公司
+***************************************************************************/
+
+#ifndef __dmpservicenativeloader_h__
+#define __dmpservicenativeloader_h__
+
+#include <iostream>
+#include <string>
+#include <map>
+#include <vector>
+#include <memory>
+#include <boost/function.hpp>
+#include <boost/filesystem.hpp>
+#include "dmap_server.h"
+
+class DmpServiceModule;
+class DmpServiceRegistry;
+class DmpServiceNativeModuleEntry;
+
+class SERVER_EXPORT DmpServiceNativeLoader
+{                   
+  public:
+    DmpServiceNativeLoader() = default;
+    void LoadModules(const boost::filesystem::path &module_path, DmpServiceRegistry &registrar);
+    void UnloadModules();
+    std::shared_ptr<DmpServiceModule> LoadNativeModule( const std::string &location );
+
+  private:
+    typedef std::map<std::string, std::shared_ptr<DmpServiceModule>> ModuleMap;
+    std::shared_ptr<DmpServiceModule> FindModule(const std::string &location);
+    ModuleMap modules_;
+};
+
+#endif // __dmpservicenativeloader_h__