fll.web.developer.ReplaceChallengeDescriptor.java Source code

Introduction

Here is the source code for fll.web.developer.ReplaceChallengeDescriptor.java

Source

/*
 * Copyright (c) 2010 INSciTE.  All rights reserved
 * INSciTE is on the web at: http://www.hightechkids.org
 * This code is released under GPL; see LICENSE.txt for details.
 */

package fll.web.developer;

import java.io.IOException;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.SQLException;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;

import net.mtu.eggplant.util.sql.SQLFunctions;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.log4j.Logger;
import org.w3c.dom.Document;

import fll.Utilities;
import fll.db.GenerateDB;
import fll.util.LogUtils;
import fll.web.ApplicationAttributes;
import fll.web.BaseFLLServlet;
import fll.web.UploadProcessor;
import fll.xml.ChallengeParser;

@WebServlet("/developer/ReplaceChallengeDescriptor")
public class ReplaceChallengeDescriptor extends BaseFLLServlet {

    private static final Logger LOGGER = LogUtils.getLogger();

    protected void processRequest(final HttpServletRequest request, final HttpServletResponse response,
            final ServletContext application, final HttpSession session) throws IOException, ServletException {
        if (LOGGER.isTraceEnabled()) {
            LOGGER.trace("Top of ReplaceChallengeDescriptor.doPost");
        }

        final StringBuilder message = new StringBuilder();

        Connection connection = null;
        try {
            final DataSource datasource = ApplicationAttributes.getDataSource(application);
            connection = datasource.getConnection();

            final Document curDoc = ApplicationAttributes.getChallengeDocument(application);

            // must be first to ensure the form parameters are set
            UploadProcessor.processUpload(request);

            // create a new empty database from an XML descriptor
            final FileItem xmlFileItem = (FileItem) request.getAttribute("xmldoc");

            final Document newDoc = ChallengeParser
                    .parse(new InputStreamReader(xmlFileItem.getInputStream(), Utilities.DEFAULT_CHARSET));

            final String compareMessage = ChallengeParser.compareStructure(curDoc, newDoc);
            if (null == compareMessage) {
                GenerateDB.insertOrUpdateChallengeDocument(newDoc, connection);
                application.setAttribute(ApplicationAttributes.CHALLENGE_DOCUMENT, newDoc);
                message.append("<p><i>Successfully replaced challenge descriptor</i></p>");
            } else {
                message.append("<p class='error'>");
                message.append(compareMessage);
                message.append("</p>");
            }
        } catch (final FileUploadException fue) {
            message.append("<p class='error'>Error handling the file upload: " + fue.getMessage() + "</p>");
            LOGGER.error(fue, fue);
        } catch (final SQLException sqle) {
            message.append("<p class='error'>Error talking to the database: " + sqle.getMessage() + "</p>");
            LOGGER.error(sqle, sqle);
            throw new RuntimeException("Error talking to the database", sqle);
        } finally {
            SQLFunctions.close(connection);
        }

        if (LOGGER.isTraceEnabled()) {
            LOGGER.trace("Top of ReplaceChallengeDescriptor.doPost");
        }

        session.setAttribute("message", message.toString());
        response.sendRedirect(response.encodeRedirectURL("index.jsp"));

    }
}