add

+/*
+ * @Author: your name
+ * @Date: 2021-04-26 11:49:54
+ * @LastEditTime: 2021-04-26 11:53:35
+ * @LastEditors: Please set LastEditors
+ * @Description: In User Settings Edit
+ * @FilePath: /dmapserver/src/server/dmpservicenativeloader.cpp
+ */
+/**************************************************************************
+* file:              dmpservicenativeloader.cpp
+
+* Author:            wanzhongping
+* Date:              2020-12-24 16:01:21
+* Email:             zhongpingw@chinadci.com
+* copyright:         广州城市信息研究所有限公司
+***************************************************************************/
+#include "dmpservicenativeloader.h"
+#include "dmpservicemodule.h"
+#include <boost/dll/import.hpp>
+#include <dlfcn.h>
+#include "dmpserverutils.h"
+
+std::shared_ptr<DmpServiceModule> DmpServiceNativeLoader::LoadNativeModule(const std::string &location)
+{
+    std::shared_ptr<DmpServiceModule> sp_module = FindModule(location);
+    if (sp_module)
+    {
+        return sp_module;
+    }
+
+    boost::dll::fs::error_code error;
+    std::shared_ptr<boost::dll::shared_library> lib = std::make_shared<boost::dll::shared_library>(location, error);
+    if (error)
+    {
+        return nullptr;
+    }
+    if (lib->has("service_module"))
+    {
+        sp_module = boost::move(lib)->get_alias<std::shared_ptr<DmpServiceModule>()>("service_module")();
+        if (sp_module)
+        {
+            //保存lib的引用，否则sp_module会被释放掉
+            sp_module->set_lib(boost::move(lib));
+            modules_[location] = sp_module;
+            return sp_module;
+        }
+    }
+    return nullptr;
+}
+
+void DmpServiceNativeLoader::LoadModules(const boost::filesystem::path &module_path,
+                                         DmpServiceRegistry &registrar)
+{
+    std::vector<boost::filesystem::path> locations;
+    DmpServerUtils::GetLibraryPaths(module_path, locations);
+
+    std::vector<boost::filesystem::path>::iterator iter;
+    for (iter = locations.begin(); iter != locations.end(); iter++)
+    {
+        std::shared_ptr<DmpServiceModule> sp_module = LoadNativeModule(iter->string());
+        if (sp_module)
+        {
+            sp_module->RegisterSelf(registrar);
+        }
+    }
+}
+
+std::shared_ptr<DmpServiceModule> DmpServiceNativeLoader::FindModule(const std::string &location)
+{
+    ModuleMap::iterator item = modules_.find(location);
+    if (item != modules_.end())
+    {
+        return item->second;
+    }
+    return nullptr;
+}
+
+void DmpServiceNativeLoader::UnloadModules()
+{
+    modules_.clear();
+}