zallery/src/zall/ZalleryServlet.java

package zall;

import zutil.db.DBConnection;
import zutil.log.LogUtil;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.io.IOException;
import java.sql.SQLException;
import java.util.logging.Logger;

public abstract class ZalleryServlet extends HttpServlet {
    private static Logger logger = LogUtil.getLogger();


    public final void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException {
        DBConnection db = null;
        try {
            include("header.jsp", request, response);
            doGet(request, response, db = Zallery.getDB());
            include("footer.jsp", request, response);
        } catch (ServletException e) {
            throw e;
        } catch (Exception e) {
            throw new ServletException(e);
        } finally {
            if (db != null) db.close();
        }
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response, DBConnection db) throws ServletException, SQLException, IOException {
    }

    public final void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException {
        DBConnection db = null;
        try {
            include("header.jsp", request, response);
            doPost(request, response, db = Zallery.getDB());
            include("footer.jsp", request, response);
        } catch (ServletException e) {
            throw e;
        } catch (Exception e) {
            throw new ServletException(e);
        } finally {
            if (db != null) db.close();
        }
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response, DBConnection db) throws ServletException, SQLException, IOException {
        doGet(request, response, db);
    }


    public void include(String url, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/" + url);
        if (dispatcher != null)
            dispatcher.include(request, response);
    }

    public void forward(String url, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/" + url);
        if (dispatcher != null)
            dispatcher.forward(request, response);
    }
}