Make servlet thread safe.

Dear All,

I have created a servlet that does authentication here is the following code

Code :

 
import java.io.IOException;
 
import java.io.PrintWriter;
 
import java.sql.Connection;
 
import java.sql.DriverManager;
 
import java.util.Enumeration;
 
import javax.faces.context.FacesContext;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import oracle.jdbc.pool.OracleDataSource;
 
public class Authentication extends HttpServlet {
    public void doGet(HttpServletRequest request,
                      HttpServletResponse response) throws ServletException,
                                                           IOException {
        PrintWriter pw=response.getWriter();
        pw.write("<b>Authenticating please wait.....</b>");
        pw.flush();
        pw.close();
        Enumeration enu = request.getParameterNames();
        String userID = request.getParameter("userid");
        String password = request.getParameter("password");
        String port = request.getParameter("port");
        String database = request.getParameter("database");
        String server = request.getParameter("server");
 
        OracleDataSource ds;
        try {
 
            Class.forName("oracle.jdbc.OracleDriver");
            Connection con =DriverManager.getConnection("jdbc:oracle:oci8:@"+database,
                                            userID, password);
            System.out.println("Authentication Sucess := "+con.isValid(1));
            response.sendRedirect(request.getContextPath() +
                                  "/faces/template.jsp");
        } catch (Exception e) {
            System.out.println("Authentication failed");
            response.sendRedirect(request.getContextPath() +
                                  "/faces/authfailed.jsp");
        }
    }
}

I can make servlet to implement SingleThreadModel but it is not recommended.So how can i make my code to be thread safe..should i make doGet method to be synchronized ???

-Thanks