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In JSF where would be the best place to define business rules? In the model, in the Managed-bean or in a layer of business rules( I am very reluctant to adopt this last approach), or even to implement such rules as being custom JSF validators? I have doubts about implementing a business rule in the model since I don’t know when this method would be called, since the bean will directly access the model sets.
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Hello. I don’t know if that would really be an answer because you could use it the way you think best. Here in the company where I work we have this structure:
Our vision layer is composed of:
Our business rule is composed of:
And the controllers are:
But as I told you, it depends on how you adapt in your business! Hugs
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The best place is at the example Service layer
Example :
public class LoginController {
@inject
private LoginService loginService;
public void login(Login login)
{
loginService.login(login);
}
}
public class LoginService {
public boolean login(Login login){
//todas as Regras feitas aqui!
if(){
}
}
}
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Like Gilvan said, there are several ways to do it, here at the company we do it like this:
I get it. I think my simplest rules will be transformed into custom JSF validators. And I’ll leave the service class only with methods that have to access the database.
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We also use it like this. And a package with all objects. A difficulty is always using BC to perform the validations, but always ends up getting something in Bean... I don’t know if I’m the only one who ends up in this situation.
– Rodrigo
Of course, some things will always land on Bean. In my case, for example, I have separate projects (libraries I would say), that is, one project is the vision layer and the other is the business rule. Some dependencies that I have in the vision layer I don’t have in the business, and I wouldn’t have to have just to make validations... then I make the validations in the same bean. The validations considered standards I do in BC.
– Gilvan André