si.mko.test.serialize.JacksonSmileServlet.java Source code

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Here is the source code for si.mko.test.serialize.JacksonSmileServlet.java

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/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package si.mko.test.serialize;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.smile.SmileFactory;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collection;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import si.mko.test.serialize.api.CTransferObjectDefaultSerialization;
import si.mko.test.serialize.api.CTransferObjects;
import si.mko.test.serialize.api.ITransferObject;
import si.mko.test.serialize.resource.CDataProvider;

/**
 *
 * @author matej
 */
@WebServlet(name = "JacksonSmileServlet", urlPatterns = { "/smile" })
public class JacksonSmileServlet extends HttpServlet {

    //https://stackoverflow.com/questions/3907929/should-i-declare-jacksons-objectmapper-as-a-static-field
    private static SmileFactory f = new SmileFactory();
    private static ObjectMapper mapper = new ObjectMapper(f);

    /**
     * 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 {

        int n = Integer.parseInt(request.getParameter("n"));

        Collection<ITransferObject> result = CDataProvider.INSTANCE.get(n,
                CTransferObjectDefaultSerialization.class);
        CTransferObjects objectToSerialize = new CTransferObjects(result);

        OutputStream fout = response.getOutputStream();

        try {

            byte[] object = mapper.writeValueAsBytes(objectToSerialize);
            System.out.println("object size: " + object.length);

            response.setContentLength(object.length);
            fout.write(object);

        } finally {
            fout.flush();
            fout.close();
            fout = null;
        }
    }

    // <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>

}