Народ подскажите как правильно организовать архитектуру приложения под AJAX (на запрос от клиента возвращается XML)
может как то организовать Pool'ы (Servic'ы)?
воть мой код:
| Код |
import java.io.*;
import java.net.*;
import java.util.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Request extends HttpServlet {
public Connection connection;
HttpSession session;
public void init(ServletConfig config) throws ServletException {
super.init(config);
try {
Properties properties = new Properties();
properties.load(getClass().getResourceAsStream("config.properties"));
try {
Class.forName(properties.getProperty("driver"));
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
connection = DriverManager.getConnection(properties.getProperty("url"),
properties.getProperty("user"), properties.getProperty("password"));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (SQLException eSQL) {
eSQL.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/xml;charset=windows-1251");
PrintWriter out = response.getWriter();
if(session != null) session.invalidate();
try {
Statement sql = connection.createStatement();
ResultSet rs = sql.executeQuery("SELECT * FROM webuser WHERE userID ='" + request.getParameter("userID") + "' AND pinCode = '" + request.getParameter("pinCode") + "'");
if (!rs.next()) {
out.println("<response><argument name='access' value='false'></argument></response>");
} else {
out.println("<response><argument name='access' value='true'></argument></response>");
session = request.getSession(true);
session.setAttribute("userID", rs.getString("userID"));
session.setAttribute("client", rs.getString("name"));
}
} catch (SQLException eSQL) { out.println("ERROR: " + eSQL + "<br />"); }
out.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
public void destroy() {
try {
if(connection != null) connection.close();
} catch (SQLException eSQL) { eSQL.printStackTrace(); }
}
}
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