Persisting Entity with composite key is not working

[Shaily Shah]

Hi,

I am using Spring3 and hibernate3 and JPA annotations. I have an entity class which has composite key as a primary key. Two columns id and created_time defines primary key. Out of these two columns id is generated using a sequence and created_time is something which we set on entity object.

I have my entity class defined as below with a separate class for primary key.

@Entity
@Table (name = "event")
public class Event {

	private String description;
	
	@EmbeddedId private EventPK id;
	
    public EventPK getId() {
		return id;
	}
	public void setId(EventPK id) {
		this.id = id;
	}
	
    @Column(name="descr", nullable = true)
	public String getDescription() {
		return description;
	}
	public void setDescription(String description) {
		this.description = description;
	}
	
}

@Embeddable
public class EventPK implements Serializable {
	private long id;
	private long createdT;

	@Column(name="id", unique = false, nullable = false)
	@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="id_sequence")
	@SequenceGenerator( name="id_sequence", sequenceName="id_sequence" )
	public long getID() {
		return id;
	}
	public void setID(long id) {
		this.id = id;
	}
	
    @Column(name="created_t", unique=false, nullable = false)
	public long getCreatedT() {
		return createdT;
	}
	public void setCreatedT(long createdT) {
		this.createdT = createdT;
	}
	
	@Override
	public int hashCode() {
              //Here i have auto generated code for hashcode
	}
	@Override
	public boolean equals(Object obj) {
              //Here i have auto generated code for equals	
        }
	 
}

My DAO has a call to save this entity:

	public void insert(Event event) {
		try {
			hibernateTemplate.save(event);
		} catch (HibernateException he) {
			throw new DataAccessException("some message", he);
		}
	}

The problem is when I am trying to save this entity using code above, the sequence number generated for the field "id" is totally incorrect. I don't understand why it is doing this. I am new to spring and hibernate. If any can tell me if I am doing something wrong. Let me know if any more information is required.

Any help is greatly appreciated.

Thanks