package com.openhouseautomation;
import com.openhouseautomation.model.Sensor;
import static com.googlecode.objectify.ObjectifyService.ofy;
import com.google.appengine.api.datastore.Cursor;
import com.google.appengine.api.datastore.QueryResultIterator;
import com.googlecode.objectify.cmd.Query;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*
* @author dras
*/
public class DatastoreExport extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* 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 {
response.setContentType("text/plain;charset=UTF-8");
PrintWriter out = response.getWriter();
boolean done = false;
int tickler = 0;
Cursor cursor = null;
try {
while (!done) {
tickler = 0;
Query<Sensor> query = ofy().load().type(Sensor.class).limit(1000);
if (cursor != null) {
query = query.startAt(cursor);
}
QueryResultIterator<Sensor> iterator = query.iterator();
while (iterator.hasNext()) {
Sensor sens = iterator.next();
out.println(sens.toString());
tickler++;
}
cursor = iterator.getCursor();
if (tickler == 0) {
done = true;
}
}
} finally {
out.flush();
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>
}