/*
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* as indicated by the @author tags. See the copyright.txt file in the
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*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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package org.jboss.as.test.compat.jpa.eclipselink;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceUnit;
import javax.persistence.Query;
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 java.io.IOException;
import java.io.Writer;
/**
* @author Scott Marlow
*
* Exercise the code paths reached when a container managed entity manager is injected into a servlet
*/
@WebServlet(name="SimpleServlet", urlPatterns={"/simple"})
public class SimpleServlet extends HttpServlet {
@PersistenceUnit(unitName = "web_hibernate3_pc")
EntityManagerFactory emf; // servlet is in control of when obtained entity managers are closed
@PersistenceContext(unitName = "web_hibernate3_pc", name="persistence/em")
EntityManager em;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String msg = req.getParameter("input");
Writer writer = resp.getWriter();
// This is how a servlet could get an entity manager from an entity manager factory
EntityManager localEntityManager = emf.createEntityManager();
Query query = localEntityManager.createQuery("select count(*) from WebLink");
Long count = (Long)query.getSingleResult();
localEntityManager.close();
// a new underlying entity manager will be obtained to handle creating query
// the em will stay open until the container closes it.
query = em.createQuery("select count(*) from WebLink");
count = (Long)query.getSingleResult();
writer.write(count.toString());
}
}