diff --git a/examples/static_link_example/main.cc b/examples/static_link_example/main.cc
index d977f862..27308729 100755
--- a/examples/static_link_example/main.cc
+++ b/examples/static_link_example/main.cc
@@ -1,3 +1,4 @@
+#include <drogon/DrObject.h>
 #include <iostream>
 #include <drogon/HttpAppFramework.h>
 #include <trantor/utils/Logger.h>
@@ -8,8 +9,15 @@ static const char banner[]="     _                             \n"
                            " \\__,_|_|  \\___/ \\__, |\\___/|_| |_|\n"
                            "                 |___/             \n";
 
+class HHH:public drogon::DrObject<HHH>
+{
+public:
+    HHH(){std::cout<<"class HHH constr,name="<<className()<<std::endl;}
+};
+
 int main()
 {
+    drogon::DrObjectBase *p=drogon::DrClassMap::newObject("HHH");
     std::cout<<banner<<std::endl;
     drogon::HttpAppFramework framework("0.0.0.0",12345);
     trantor::Logger::setLogLevel(trantor::Logger::TRACE);
diff --git a/lib/inc/drogon/HttpRequest.h b/lib/inc/drogon/HttpRequest.h
index 9de0dc39..1f5a8494 100755
--- a/lib/inc/drogon/HttpRequest.h
+++ b/lib/inc/drogon/HttpRequest.h
@@ -10,6 +10,9 @@
 
 namespace drogon
 {
+    /*
+     * abstract class for webapp developer to get Http client request;
+     * */
     class HttpRequest
     {
     public: