String yourMessage = request.getParameter("mine");
//Call the two ServletContext.log methods
//the javax.servlet.GenericServlet.getServletContext method
ServletContext context = getServletContext();
if (yourMessage == null || yourMessage.equals(""))
//log version with Throwable parameter
context.log("No message received:",new IllegalStateException("Missing parameter"));
else
context.log("Here is the visitor's message: " + yourMessage);
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
//logging servlets probably want to display more HTML; this is 'lazy HTML'
out.println("<html><head><title>ServletContext logging</title></head><body>");
out.println("<h2>Messages sent</h2>");
out.println("</body></html>");
