Question

I am using netbeans 6.9.1, Glassfish 3.1. I am trying to write some values to the MYSQL table.

this works and the records gets saved to the table with no problem. But everytime when i restart glassfish or build the project all the saved data from the MySQL tables gets erased. How do i avoid this.

I have used Entity beans and Persistence to create table (auto generate tables)

@Entity
public class HotelVacancy implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@OneToOne (cascade=CascadeType.ALL)
private Hotel hotId;
private int noVancies;

public Long getId() {
    return id;
}

 ...

How do i solve this

Answer 1

When you have follow (or similar) row in your persistence.xml:

<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>

delete it.