Versioning for Optimistic Locking in Hibernate

package com.concretepage.persistence;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Version;

@Entity
@Table(name="user")  
public class User {
	@Id
	@GeneratedValue
	private int id;
		
	@Column(name="name")
	private String name;
	
	@Version
        @Column(name="OPTLOCK")
        public Long getVersion() { 
	   return System.currentTimeMillis();
        }

	public int getId() {
		return id;
	}

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

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}