it.marcoberri.mbmeteo.action.Get.java Source code

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Here is the source code for it.marcoberri.mbmeteo.action.Get.java

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/**
 * Copyright 2011 Marco Berri - marcoberri@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 *
 */
package it.marcoberri.mbmeteo.action;

import com.github.jmkgreen.morphia.Datastore;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import it.marcoberri.mbmeteo.helper.ConfigurationHelper;
import it.marcoberri.mbmeteo.helper.MongoConnectionHelper;
import it.marcoberri.mbmeteo.model.Meteolog;
import it.marcoberri.mbmeteo.utils.Log4j;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Marco Berri <marcoberri@gmail.com>
 */
public class Get extends HttpServlet {

    /**
     *
     */
    protected final org.apache.log4j.Logger log = Log4j.getLogger("mbmeteo",
            ConfigurationHelper.prop.getProperty("log.path"), Log4j.ROTATE_DAILY);

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        log.debug("start : " + this.getClass().getName());

        final PrintWriter out = response.getWriter();
        try {
            final Map params = request.getParameterMap();

            int limit = 25;

            if (params.containsKey("limit")) {
                final String s[] = (String[]) params.get("limit");
                limit = Integer.parseInt(s[0]);
            }

            int start = 0;
            if (params.containsKey("start")) {
                final String s[] = (String[]) params.get("start");
                start = Integer.parseInt(s[0]);
            }

            String order = "-time";
            if (params.containsKey("order")) {
                final String s[] = (String[]) params.get("order");
                order = s[0];
            }

            final Datastore ds = MongoConnectionHelper.ds;
            final List<Meteolog> meteoLogList = ds.find(Meteolog.class).order(order).offset(start).limit(limit)
                    .asList();
            final GsonBuilder gsonBuilder = new GsonBuilder();
            gsonBuilder.setDateFormat("yyyyMMddHHmm");
            final Gson gson = gsonBuilder.create();
            final HashMap endMap = new HashMap();
            endMap.put("data", meteoLogList);
            endMap.put("totalCount", ds.find(Meteolog.class).countAll());

            response.setContentType("application/json");
            response.setHeader("Content-Disposition", "attachment; filename=\"result.json\"");

            out.println(gson.toJson(endMap));
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}