Can we get ServletConfig inside constructor of Servlet ?

It is not possible to get ServletConfig inside constructor of Servlet.

Scenario

Given a servlet

public class myServlet extends HttpServlet{

  int allowable_connections;

  public myServlet() {    // constructor

   allowable_connections = 

       getServletConfig().getInitParameter("allowable_connections");

  }

 public void service(HttpServletRequest req, 

               HttpServletResponse resp) throws Exception{

   PrintWriter out = request.getWriter();

   out.println("Allowable connections are:"+allowable_connections);

 }

}

Given allowable_connections init parameter's value is defined as 10 in the web.xml for the servlet, what will happen when a POST request is received for this servlet ?

Answer

The servlet will not be loaded.

Constructor is too early to call getServletConfig method.