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package org.glassfish.tests.paas.spetest;
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.persistence.Query;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.transaction.UserTransaction;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
//import javax.management.*;
/**
*
* @author ishan.vishnoi@java.net
*/
public class BasicJPAPaaSServlet extends HttpServlet {
@PersistenceUnit(unitName = "BasicJPAPU")
private EntityManagerFactory emf;
@Resource
UserTransaction utx;
/**
* 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 java.io.IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
Animal firstAnimal = new Animal();
firstAnimal.setName("Shera");
firstAnimal.setCageNumber("A1");
firstAnimal.setID(1);
firstAnimal.setSpecies("Lion");
firstAnimal.setYearOfBirth("2001");
Boolean x = addAnimal(firstAnimal);
Animal secondAnimal = new Animal();
secondAnimal.setName("Bhola");
secondAnimal.setCageNumber("A2");
secondAnimal.setID(2);
secondAnimal.setSpecies("Bear");
secondAnimal.setYearOfBirth("2004");
x = addAnimal(secondAnimal);
Animal thirdAnimal = new Animal();
thirdAnimal.setName("Ringa");
thirdAnimal.setCageNumber("A3");
thirdAnimal.setID(3);
thirdAnimal.setSpecies("Rhino");
thirdAnimal.setYearOfBirth("2007");
x = addAnimal(thirdAnimal);
try {
out.println("<html>");
out.println("<head>");
out.println("<link rel='stylesheet' type='text/css' href='newcss.css' />");
out.println("<title>Servlet NewServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("Here is a list of animals in the zoo.");
List dir = sortByName();
Iterator dirIterator = dir.iterator();
out.println("<table border='1'>");
while (dirIterator.hasNext()) {
out.println("<tr>");
Animal animal = (Animal) dirIterator.next();
out.println("<td> id:" + animal.getID() + "</td>");
out.println("<td> name:" + animal.getName() + "</td>");
out.println("<td> species:" + animal.getSpecies() + "</td>");
out.println("<td> cage_number:" + animal.getCageNumber() + "</td>");
out.println("<td> year_of_birth:" + animal.getYearOfBirth() + "</td>");
out.println("</tr>");
}
out.println("</table>");
out.println("<br><a href='index.jsp'>Back</a>");
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
}
public List sortByName() {
EntityManager em = emf.createEntityManager();
Query q = em.createQuery("SELECT x FROM Animal x order by x.name");
List results = q.getResultList();
return (results);
}
public boolean addAnimal(Animal animal) {
EntityManager em = emf.createEntityManager();
try {
utx.begin();
em.persist(animal);
utx.commit();
} finally {
em.close();
return false;
}
}
// <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 java.io.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 java.io.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>
}