#ifndef CONNECTIONDB_H
#define CONNECTIONDB_H
#include "dbclient.h"
#include "connectiondb.h"
class ConnectionDb {

public:	
	static ConnectionDb& instance(); //create instance	
	virtual void connectDb() = 0;
protected: 
	ConnectionDb();
	virtual ~ConnectionDb();
private:
	mongo::DBClientConnection connection;
	static ConnectionDb *instance_; // sub class 
	friend class DisConnection;
	

};

#endif // CONNECTIONDB_H