BO with JPA/Hibernat + Spring

[phelen harg]

Hello guys,
I'm starting an app with JPA. I have my entities and the managers that list the itens in db, save and update the entity in db. My doubt is where i should put the BO. My controller jsf, will call the BO when necessary and the BO calls the manager and persist data? Can you show me an sample about it? Thanks....

[Vijitha Kumara]

Welcome to CodeRanch!

My doubt is where i should put the BO.

What you mean by *where* here? Are you talking about any design/architecture or something else?

[phelen harg]

I'm trying to understand the architecture of the project that I'm now responsable.

Currently we have this architecture:

@Entity
@Table(name="COMPANY")
@NamedQueries({
	@NamedQuery(name="empresa.max",query="SELECT MAX(e.id) FROM Empresa e")
	})
	
public class Company implements Serializable  {
	private static final long serialVersionUID = 1L;

	@Id
	private Long id;

    @ManyToOne
	@JoinColumn(name="IDCITY", referencedColumnName = "ID")
	private City city;
.
.
.
}

Manager:

@Bean(name = "companyManager")
@Transactional
public class CompanyManagerImpl extends ManagerImpl<Company, Long> implements CompanyManager {
	
	@ConstructorArgs(@Property(bean = "sessionFactory"))
	public EmpresaManagerImpl(SessionFactory sessionFactory){
		super(sessionFactory);
	}
	
	@SuppressWarnings("unchecked")
	@Override
	public List<Empresa> searchByCnpj(String cnpj) {
		Criteria crit = getSession().createCriteria(Company.class);
		
		Criterion cnpjMasc = Restrictions.eq("cnpj",cnpj);
        Criterion cnpjSemMasc = Restrictions.eq("cnpj",cnpj.replace("/", "").replace("-", "").replace(".", ""));
        LogicalExpression orExp = Restrictions.or(cnpjMasc,cnpjSemMasc);
        crit.add(orExp);		
		
		return crit.list();
	}	

	public void save(Company company) {		
		if (company.getId() == 0) {		
			company.setId(getSelectMax("empresa.max"));
			
			getSession().persist(company);
		} else { 	
			getSession().update(company);
		}
	}
}

And we are instructed, if had Busness Logic, to put them into CompanyFacade. But what I understand by facade it didn't implement Business. I'm correct? How can I implement the Business Logic in my architecture? I think that if i need some more complicated business logic that needs to comunicate itself with other classes I can create the CompanyBO and by the ManagerBean I call the Facade and it will call the other classes like CompanyBO or the entity Employee. Can you show me an example of how to do it correct?