New Post: How sessions are handled in listener

I defined my class as follows:

class GenderClassifier
{
public:

GenderClassifier(utility::string_t url, GenderIdOptions gender_id_options);

pplx::task<void> open() { return m_listener.open(); }
pplx::task<void> close() { return m_listener.close(); }

private:

void handle_get(http_request message);
void handle_put(http_request message);
void handle_post(http_request message);
void handle_delete(http_request message);

http_listener m_listener;
GenderId gender_id_;

};

and the GenderId object consumes a lot of memory and need not be duplicated for each context. In main I do the following (in initialize)

g_GenderClassifier = std::unique_ptr<GenderClassifier>(new GenderClassifier(addr,gender_id_options));
g_GenderClassifier->open().wait();

So I am just double-checking that the same class is passed as a reference to each of the threads invoking / handling the "handle_post" , "handle_get" etc.

On the other hand, there are some items that need to persist between multiple put calls of the same session, and need to be destroyed when the session expires. Where should I put those?
thanks