Single threaded servlet

Question

I need to connect to the database which has to handle multiple requests. So the best approach is to use single threaded servlet using pool of servlet instances.I read the document of single threaded servlet.I ahve gone through the code. here is the code given below:
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class SingleThreadConnection extends HttpServlet
implements SingleThreadModel {
Connection con = null; // database connection, one per pooled instance
public void init() throws ServletException {
// Establish the connection for this instance
try {
con = establishConnection();
con.setAutoCommit(false);
catch (SQLException e) {
throw new ServletException(e.getMessage());
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/plain");
PrintWriter out = res.getWriter();
try {
// Use the connection uniquely assigned to this instance
Statement stmt = con.createStatement();
// Update the database any number of ways
// Commit the transaction
con.commit();
catch (SQLException e) {
try { con.rollback(); } catch (SQLException ignored) { }
public void destroy() {
if (con != null) {
try { con.close(); } catch (SQLException ignored) { }
private Connection establishConnection() throws SQLException {
// Not implemented. See Chapter 9.
i need to know the code of establish connection. In my point of view,is it the database connection code or connection pool.But iam sure it cannot be connection pool.
Can you clear me with the code of how to establish the connection?
thanks in advance.

Answer 1

Preethi05 wrote:
private Connection establishConnection() throws SQLException {
// Not implemented. See Chapter 9.
i need to know the code of establish connection. In my point of view,is it the database connection code or connection pool.But iam sure it cannot be connection pool.
Can you clear me with the code of how to establish the connection?My guess is its the connection pool here, its a guess though. Also its mentioned there to see chapter 9, that might say something.
regards,'
a_joseph