ok,
since I already have the schema, how can I generate the EJB entities or at
least how can I design the web-services to interchange the data based on the
schema ?
i.e., I have a schema and I want to create an application based on on this
schema.. using EJB to represent data, JPA to persist the EJBs and
web-services to expose the data...
On 7/13/06, Sameer Tyagi <Sameer.Tyagi_at_sun.com> wrote:
>
> You could used standard J2EE role based security
>
>
> /s
>
>
>
>
> Felipe Gaścho wrote:
>
> ok, some use cases:
>
> - the professor mofidy (crud) questions into the database
> - the student read a set of questions from the database
>
> the question is: how can I control the access to the questions using
> web-services?
>
>
> On 7/13/06, Sameer Tyagi <Sameer.Tyagi_at_sun.com> wrote:
> >
> > Hello.
> >
> > In most large scale enterprise applications that I have been involved
> > in, the
> > web services layer is viewed as an abstraction to expose reusable
> > services
> > as "web services" using a particular transport.
> > In your case I would focus on your domain model and getting the right
> > granularity
> > in the services. How you expose the business logic, (EJB's of PoJos)
> > depends
> > on the use case, need for transactional context, security, reusability
> > etc.
> > In most application architects prefer to keep the business logic
> > separate from
> > the facade exposing it, and then depending on the use case, layer that
> > with
> > an EJB or other component.
> > For example if there is no transactional or security context in the
> > service, you could
> > expose the same class containing your business logic as a JAX-WS service
> > implementation
> > or as a stateless EJB web service endpoint.
> >
> > I m not sure what you mean by controlling data access in your question
> > below.
> >
> > Hope this helps.
> > /s
> >
> >
> >
> >
> > Felipe Gaścho wrote:
> >
> > > Dear friends,
> > >
> > > I am designing a new Enterprise Application here.. and I have some
> > > questions:
> > >
> > > the original idea is to use the following architecture:
> > >
> > > business > middleware > presentation
> > > JPA + EJB JAX-WS servlets/swing
> > >
> > >
> > > the questions are:
> > >
> > > - Where I can implement the business logic? only in the EJB? both in
> > > EJB and JPA? or either both in EJB and JAX-WS ?
> > > - Can I control the data access from the user into the JAX-WS
> > > middleware? how? using role based JAAS? how to ?
> > >
> > > a lot of concepts and experiements, I know... but the best kickoff
> > > seems to be asking other developers...
> > >
> > > best regards,
> > >
> > > Felipe Gaucho
> > >
> > >
>
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