55 lines
1.6 KiB
Java
55 lines
1.6 KiB
Java
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import java.io.IOException;
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import java.util.List;
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import javax.annotation.Resource;
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import javax.persistence.EntityManager;
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import javax.persistence.PersistenceContext;
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import javax.persistence.Query;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.transaction.UserTransaction;
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import model.User;
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/**
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* Servlet implementation class TestJPAServlet
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*/
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public class TestJPAServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@PersistenceContext(unitName = "wildfly-jpa")
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EntityManager em;
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@Resource
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UserTransaction tx;
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/**
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* @see HttpServlet#HttpServlet()
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*/
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public TestJPAServlet() {
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super();
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// TODO Auto-generated constructor stub
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}
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/**
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* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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Query q = em.createNamedQuery("User.findAll");
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List<User> users = q.getResultList();
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response.getWriter()
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.append("JPA users returned: " + users.size());
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}
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/**
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* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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// TODO Auto-generated method stub
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doGet(request, response);
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}
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}
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