Example usage for javax.persistence EntityManagerFactory createEntityManager

Introduction

In this page you can find the example usage for javax.persistence EntityManagerFactory createEntityManager.

Prototype

public EntityManager createEntityManager();

Source Link

Document

Create a new application-managed EntityManager.

Usage

From source file:Professor.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();/* ww w.j  ava  2 s  . c  o  m*/

        Professor emp = service.createProfessor(1, "name", 100);
        emp = service.createProfessor(2, "name 2", 100);

        Collection emps = em.createQuery("SELECT e FROM Professor e").getResultList();
        for (Iterator i = emps.iterator(); i.hasNext();) {
            Professor e = (Professor) i.next();
            System.out.println("Professor " + e.getId() + ", " + e.getName());
        }
        util.checkData("select * from Professor");

        em.getTransaction().commit();
        em.close();
        emf.close();
    }

---

From source file:Main.java

  public static void main(String[] a) throws Exception {
  JPAUtil util = new JPAUtil();

  EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
  EntityManager em = emf.createEntityManager();
  ProfessorService service = new ProfessorService(em);

  em.getTransaction().begin();//from   w  w w  .  ja va 2 s .c o m

  service.findAll();
    
    
  util.checkData("select * from Professor");
  util.checkData("select * from Department");

    
  em.getTransaction().commit();
  em.close();
  emf.close();
}

---

From source file:Professor.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();/*www  . j a v a  2  s. co  m*/
        Professor emp = service.createProfessor(158, "AAA", 45000);
        em.getTransaction().commit();
        System.out.println("Persisted " + emp);

        util.checkData("select * from EMP");

        // remove an employee
        em.getTransaction().begin();
        service.removeProfessor(158);
        em.getTransaction().commit();
        System.out.println("Removed Professor 158");

        util.checkData("select * from EMP");

        em.close();
        emf.close();
    }

---

From source file:Professor.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();/*from w  w  w.j  a  va  2s  .  co m*/

        util.checkData("select * from CONTRACT_EMP");

        em.getTransaction().commit();
        em.close();
        emf.close();
    }

---

From source file:ContractProfessor.java

  public static void main(String[] a) throws Exception {
  JPAUtil util = new JPAUtil();

  EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
  EntityManager em = emf.createEntityManager();
  ProfessorService service = new ProfessorService(em);

  em.getTransaction().begin();/*from w  w  w.  ja  v a2s . co  m*/

  Professor emp = null;
  emp = new ContractProfessor();

  emp.setId(1);
  emp.setName("name");
  service.createProfessor(emp);

  System.out.println("Professors: ");
  for (Professor emp1 : service.findAllProfessors()) {
    System.out.print(emp1);
  }

  util.checkData("select * from EMP");

  em.getTransaction().commit();
  em.close();
  emf.close();
}

---

From source file:Professor.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();//from ww  w .j  a v a 2 s  .com

        Professor emp = service.createProfessor(1, "name", 100);
        emp = service.createProfessor(2, "name 2", 100);

        Integer userId = 1;

        emp = em.find(Professor.class, userId);
        if (emp == null) {
            System.out.println(userId + " not found! ");
        } else {
            System.out.println("Found " + emp);
        }

        for (Object o : em.createQuery("SELECT u FROM Professor u").getResultList()) {
            System.out.println(o);
        }

        util.checkData("select * from Professor");

        em.getTransaction().commit();
        em.close();
        emf.close();
    }

---

From source file:Department.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();//from   w  ww  .  jav a  2s  .  c o m

        service.createProfessor(1, "empName", 1);

        util.checkData("select * from Professor");

        em.getTransaction().commit();
        em.close();
        emf.close();
    }

---

From source file:Professor.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();/*  w  ww  . jav  a  2 s  . c  o m*/
        Professor emp = service.createProfessor(158, "AAA", 45000, new Date());
        em.getTransaction().commit();
        System.out.println("Persisted " + emp);

        util.checkData("select * from Professor");

        // remove an employee
        em.getTransaction().begin();
        service.removeProfessor(158);
        em.getTransaction().commit();
        System.out.println("Removed Professor 158");

        util.checkData("select * from Professor");

        em.close();
        emf.close();
    }

---

From source file:BadProfessor.java

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();//from w ww . ja v a  2 s.  com

        BadProfessor emp2 = new BadProfessor();
        emp2.setId(2);

        emp2.setName("bad");

        service.createProfessor(emp2);

        System.out.println("Professors: ");
        for (Professor emp1 : service.findAllProfessors()) {
            System.out.print(emp1);
        }

        util.checkData("select * from EMP");

        em.getTransaction().commit();
        em.close();
        emf.close();
    }

---

From source file:Professor.java

License:asdf

public static void main(String[] a) throws Exception {
        JPAUtil util = new JPAUtil();

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfessorService");
        EntityManager em = emf.createEntityManager();
        ProfessorService service = new ProfessorService(em);

        em.getTransaction().begin();/*from w  w w .j a v a  2s.  com*/
        Professor emp = service.createProfessor(158, "AAA", 45000, "asdf".getBytes());
        em.getTransaction().commit();
        System.out.println("Persisted " + emp);

        util.checkData("select * from EMP");

        // remove an employee
        em.getTransaction().begin();
        service.removeProfessor(158);
        em.getTransaction().commit();
        System.out.println("Removed Professor 158");

        util.checkData("select * from EMP");

        em.close();
        emf.close();
    }

---

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