org.gastro.server.internal.web.GastroServlet.java Source code

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Here is the source code for org.gastro.server.internal.web.GastroServlet.java

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/*
 * Copyright (c) 2009-2012, 2015 Eike Stepper (Berlin, Germany) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Eike Stepper - initial API and implementation
 *
 *  Initial Publication:
 *    Eclipse Magazin - http://www.eclipse-magazin.de
 */
package org.gastro.server.internal.web;

import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.net4j.CDONet4jSession;
import org.eclipse.emf.cdo.net4j.CDONet4jSessionConfiguration;
import org.eclipse.emf.cdo.net4j.CDONet4jUtil;
import org.eclipse.emf.cdo.server.IRepository;
import org.eclipse.emf.cdo.view.CDOView;

import org.eclipse.net4j.Net4jUtil;
import org.eclipse.net4j.acceptor.IAcceptor;
import org.eclipse.net4j.connector.IConnector;
import org.eclipse.net4j.util.StringUtil;
import org.eclipse.net4j.util.container.IPluginContainer;
import org.eclipse.net4j.util.io.IOUtil;
import org.eclipse.net4j.util.om.OMPlatform;

import org.apache.commons.lang.StringEscapeUtils;
import org.gastro.business.BusinessDay;
import org.gastro.inventory.MenuCard;
import org.gastro.server.GastroServer;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

import templates.MenuCardTemplate;

/**
 * @author Eike Stepper
 */
public class GastroServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    private String restaurantName;

    private IAcceptor acceptor;

    private IConnector connector;

    private CDOView view;

    private MenuCard menuCard;

    private MenuCardTemplate template = MenuCardTemplate.create(StringUtil.NL);

    private IRepository repository;

    public GastroServlet() {
    }

    @Override
    public void init() throws ServletException {
        repository = GastroServer.getRepository();
        if (repository == null) {
            return;
        }

        OM.LOG.info("Gastro servlet initializing");
        String repositoryName = repository.getName();
        restaurantName = getRestaurantName();

        acceptor = Net4jUtil.getAcceptor(IPluginContainer.INSTANCE, "jvm", repositoryName);
        connector = Net4jUtil.getConnector(IPluginContainer.INSTANCE, "jvm", repositoryName);

        CDONet4jSessionConfiguration config = CDONet4jUtil.createNet4jSessionConfiguration();
        config.setConnector(connector);
        config.setRepositoryName(repositoryName);

        CDONet4jSession session = config.openNet4jSession();
        view = session.openView();
        super.init();
        OM.LOG.info("Gastro servlet initialized");
    }

    @Override
    public void destroy() {
        if (repository == null) {
            return;
        }

        OM.LOG.info("Gastro servlet destroying");
        if (view != null) {
            CDONet4jSession session = (CDONet4jSession) view.getSession();
            if (session != null) {
                session.close();
            }
        }

        if (connector != null) {
            connector.close();
        }

        if (acceptor != null) {
            acceptor.close();
        }

        super.destroy();
        OM.LOG.info("Gastro servlet destroyed");
    }

    public synchronized MenuCard getMenuCard() {
        if (menuCard == null) {
            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
            String path = restaurantName + "/" + formatter.format(new Date());
            CDOResource resource = view.getResource(path);
            BusinessDay businessDay = (BusinessDay) resource.getContents().get(0);
            menuCard = businessDay.getMenuCard();
        }

        return menuCard;
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        PrintWriter writer = resp.getWriter();

        try {
            String html = template.generate(getMenuCard());
            writer.print(html);
        } finally {
            IOUtil.close(writer);
        }
    }

    public static String getRestaurantName() throws ServletException {
        try {
            String configPath = OMPlatform.INSTANCE.getProperty("servlet.config", "config/gastro.properties");
            // InputStream stream = new FileInputStream(configPath);
            InputStream stream = OM.BUNDLE.getInputStream(configPath);

            try {
                Properties properties = new Properties();
                properties.load(stream);
                return properties.getProperty("restaurant");
            } finally {
                stream.close();
            }
        } catch (IOException ex) {
            throw new ServletException(ex);
        }
    }

    public static String html(String value) {
        return StringEscapeUtils.escapeHtml(value);
    }

    public static String html(double value) {
        return html(NumberFormat.getCurrencyInstance().format(value));
    }
}