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import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ContextLog extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
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>");
} //end doGet
}
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