Re: How to use Request Factory with JPA Hibernate and PostgreSQL ?

Some more Info:
Thats the Worker.java class:

package de.mash.project.server;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Persistence;
import javax.persistence.Table;
import javax.persistence.Transient;

@Entity
@Table(name = "Worker")
public class Worker {

    public static Worker findWorker(Long id) {
        // if (id == 0) {
        return null;
        // }
        // EntityManager em = entityManager();
        // try {
        // Worker worker = em.find(Worker.class, id);
        // return worker;
        // } finally {
        // em.close();
        // }
    }

    @Transient
    protected Object[] jdoDetachedState;

    // @Id
    // @GeneratedValue(generator = "auto_increment")
    // @GenericGenerator(name = "auto_increment", strategy = "increment")
    // @Column(name = "id")
    // private int id;

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "first_name")
    private String firstName;

    @Column(name = "last_name")
    private String lastName;

    @Column(name = "salary")
    private int salary;

    public Worker() {
    }

    public Worker(String fname, String lname, int salary) {
        this.firstName = fname;
        this.lastName = lname;
        this.salary = salary;
    }

    public Long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String first_name) {
        this.firstName = first_name;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String last_name) {
        this.lastName = last_name;
    }

    public int getSalary() {
        return salary;
    }

    public void setSalary(int salary) {
        this.salary = salary;
    }

    public static Long countWorkers() {
        return 2l;
    }

    public Integer getVersion() {
        return 1;
    }

    public void persist() {
        // EntityManager em = entityManager();
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("transactions-optional");
        EntityManager em = emf.createEntityManager();
        try {
            em.persist(this);
        } catch (Exception e) {
            int i = 1;
        } finally {
            em.close();
        }
    }

    public static final EntityManager entityManager() {
        return EMF.get().createEntityManager();
    }

}

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