Hi Vlada,
Can you ellaborate more on how this can be done ?
I too might need to supply such a generic implementation
and would like to know how to approach this situation.
Thanks,
eyal.
----- Original Message -----
From: Vlada Matena <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: ��� ����� 19 ����� 2000 20:52
Subject: Re: EJBHome create method
> You cannot do this directly with the EJB spec. If you need to use a
generic factory interface
> in your app, you will need to layer some framework on top of the EJB home
interface.
>
> Vlada
>
> ----- Original Message -----
> From: Mario de Sa Vera <[EMAIL PROTECTED]>
> To: Vlada Matena <[EMAIL PROTECTED]>
> Cc: <[EMAIL PROTECTED]>
> Sent: Wednesday, January 19, 2000 10:42 AM
> Subject: Re: EJBHome create method
>
>
> > Ok Vlada,
> >
> > I think now we are on the same page... the problem I am having
is
> > due to this phrase :
> >
> > "methods of the home interface are defined as type-specific,
not
> > generic"
> >
> >
Vlada.
> >
> > What I am trying to do is having a call to create on a generic
> > Home Interface and unfortunately
> > I think this will not be possible... at least I can't seem to find a
> > reasonable implementation for that :
> >
> > EJBObject _genericSkel = _genericHome.create(_genericPk);
> >
> > THERE IS NO WAY TO CREATE AN INTERFACE CALLED GENERICHOME THAT
> > WOULD HAVE
> > A CREATE METHOD BECAUSE THE REMOTE INTERFACE TYPE IS STILL NOT DEFINED
!!!
> >
> > Do you see any solution for that... I think it could be very useful...
> >
> > thanks a lot and if you still don't understand my question please feel
free
> > to give me a call ... I'd appreciate
> > it !
> >
> >
> >
> >
> >
> > At 10:18 AM 1/19/00 -0800, you wrote:
> > >I misunderstood your question. I still don't fully understand what you
are
> > >trying to accomplish.
> > >Could you send a more specific example using the late binding
technique?
> > >Perhaps we
> > >can figure out a solution that would work with you within the spec
> > >constraints.
> > >
> > >Note that we wanted to make the home interface type-safe. Therefore,
the
> > >create and finder
> > >methods of the home interface are defined as type-specific, not
generic.
> > >The other reason
> > >why we wanted the methods to return the exact type was to avoid the
client
> > >to perform
> > >the PortableRemoteObject.narrow operation.
> > >
> > >Vlada
> > >
> > >----- Original Message -----
> > >From: Mario de Sa Vera <[EMAIL PROTECTED]>
> > >To: Vlada Matena <[EMAIL PROTECTED]>
> > >Sent: Wednesday, January 19, 2000 9:18 AM
> > >Subject: Re: EJBHome create method
> > >
> > >
> > > > Thanks Vlada for the prompt response...
> > > >
> > > > Are you sure Vlada ? I think the EJB specification
REQUIRES
> > > that the
> > > > return type for the create method from the Home Interface HAS TO BE
THE
> > > > REMOTE INTERFACE type and not a generic type like EJBObject... this
is
> > > > exactly the problem I am facing... this is bringing me a huge
problem
> > > because
> > > > as we know this implementation would be ideal and very standard in
terms of
> > > > Object Oriented design ... I am using a generic implementation that
at
> > > run time
> > > > will be replaced by a specific implementation of this generic class
> > > (classic
> > > > late binding) but the problem is that the EJBHome specification as I
said
> > > > before
> > > > does not have a generic create method implementation and if I create
> > > one there
> > > > is no way for it to work because I can't predefine the Remote
Interface
> > > return
> > > > type do you understand ?
> > > >
> > > > thanks again.
> > > >
> > > >
> > > >
> > > > At 08:50 AM 1/19/00 -0800, you wrote:
> > > > >You can define the generic create(Serializable pkey) method in the
home
> > > > >interface,
> > > > >and the corresponding ejbCreate(Serializable pkey) method in the
bean
> > > class.
> > > > >
> > > > >Vlada
> > > > >
> > > > >----- Original Message -----
> > > > >From: Mario de Sa Vera <[EMAIL PROTECTED]>
> > > > >To: <[EMAIL PROTECTED]>
> > > > >Sent: Wednesday, January 19, 2000 7:45 AM
> > > > >Subject: EJBHome create method
> > > > >
> > > > >
> > > > > > Hello guys,
> > > > > >
> > > > > >
> > > > > > I've being involved on a couple of projects using EJB since last
> > > year and
> > > > > > for the first
> > > > > > time I find myself facing a wall that will be very hard for me
to
> > > overcome
> > > > > > it. May be you could
> > > > > > help me out either by answering me or sending me a EJB list
group
> > > to help
> > > > > > me out somehow...
> > > > > >
> > > > > > EJBHome does not define a generic create method although the EJB
> > > compiler
> > > > > > requires (to
> > > > > > a certain extent) that you define one and once you define one
create
> > > > > method
> > > > > > at your home
> > > > > > interface it checks if you defined a correspondent method at the
Bean
> > > > > class
> > > > > > (ejbCreate). This
> > > > > > scenario works fine if you already know in advance the Remote
Interface
> > > > > > class because that
> > > > > > way you can define create methods from your home interface
> > > returning the
> > > > > > already known type
> > > > > > of the Remote Interface...
> > > > > >
> > > > > > The problem I am facing is that I want to have a late binding
Remote
> > > > > > Interface creation which
> > > > > > will require a generic Home Interface that defines a generic
create
> > > method
> > > > > > but the specification does
> > > > > > not allow me to do that because there is no generic create
method
> > > at the
> > > > > > EJBHome like :
> > > > > >
> > > > > > EJBObject create(EJBPrimaryKey) // I am going further with the
> > > > > > specification this is only a suggestion.
> > > > > >
> > > > > >
> > > > > > Will I have to simulate an Entity Bean using Session Beans ?
> > > > > >
> > > > > > thanks.
> > > > > >
> > > > > >
> > > > > > Mario de Sa Vera
> > > > > > Applications Engineer
> > > > > > 161 Maiden Lane
> > > > > > New York City 10038
> > > > > > (212) 487-7400
> > > > > >
> > > >
> > > >
> >
> > Mario de Sa Vera
> > Applications Engineer
> > 161 Maiden Lane
> > New York City 10038
> > (212) 487-7400
> >
>
>
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