How is the performance? I haven't done this before,
but it seems like the process of reading the DB then
deserielizing the object might be time-consuming?
Any metrics?
I'm not doubting you; I'm just curious ;-)
Thanks,
Lauren
--- "Juan Lorandi (Chile)" <[EMAIL PROTECTED]>
wrote:
> yes, you can use object's in CMP...
> I do that all the time with Orion Server
> just define the field as java.lang.Object, and the
> container's persistance
> manager
> will serialize the object and store it in a BLOB
> field in the database (for
> Oracle, for Sybase & SQL Server it will be image or
> varbinary).
>
> HTH
>
> JP
>
> PS: Of course, if you try to access the DB directly
> thru SQL, you will have
> to deserialize
> the Object manually. This will present additional
> difficulties if you aren't
> using Java.
>
> > -----Original Message-----
> > From: Jianguo Wang
> [mailto:[EMAIL PROTECTED]]
> > Sent: Jueves, 01 de Febrero de 2001 16:47
> > To: [EMAIL PROTECTED]
> > Subject: Re: bean design problem for one to many
> relationship
> >
> >
> > Hi,
> >
> > When you say that I can put ContactInfo in a
> Person member, you mean
> > to use BMP, don't you? To my understanding, it is
> impossible
> > to use object
> > as a member in CMP because it can not match a
> object with a
> > field in the table.
> >
> > Please verify it for me.
> >
> > -John
> >
> > -----Original Message-----
> > From: Juan Lorandi (Chile)
> [SMTP:[EMAIL PROTECTED]]
> > Sent: Thursday, February 01, 2001 12:56 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: bean design problem for one to
> many relationship
> >
> > With this design, you could easily have 2 CMP
> beans that do
> > just what you
> > want.
> > Alternatively, if contact info will only be
> accesible thru
> > Person, you could
> > store all ContactInfo
> > in a Person member:
> >
> > (very PSEUDO pseudo-code)
> > public class ContactInfo extends Object {
> > public String UID;
> > public String Type;
> > public String Detail;
> > }
> >
> > and in Person:
> >
> > ..
> > public Vector contactInfoCollection;
> > ..
> >
> > public addContact(ContactInfo contact);
> > {
> > contactInfoCollection.add(ContactInfo);
> > }
> >
> >
> > HTH
> >
> > JP
> > > -----Original Message-----
> > > From: Jianguo Wang
> [mailto:[EMAIL PROTECTED]]
> > > Sent: Jueves, 01 de Febrero de 2001 14:42
> > > To: [EMAIL PROTECTED]
> > > Subject: bean design problem for one to many
> relationship
> > >
> > >
> > > Dear friends,
> > >
> > > I have a design problem about one to many
> relationship. Can
> > > anyone there give me
> > > some suggestions,
> > >
> > > For simplicity's sake, let's say I have two
> tables
> > > Person(UID, FirstName, LastName)
> > > with primary key (UID) and ContactInfo(UID,
> Type, Detail)
> > > with primary key (UID, Type).
> > > A person may have more than one ContactInfo. For
> example,
> > >
> > > A record in the table "Person" is (777, John,
> Smith)
> > > Corresponding to this person, there are two
> records in the
> > > table "ContacInfo" like
> > > (777, Email, [EMAIL PROTECTED])
> > > (777, Phone, (850)123-4567)
> > >
> > > These information are provided at a time and can
> be saved in
> > > array (mainly ContactInfo).
> > > When I try to insert them into database, can I
> implement it
> > > as CMP? or I have to
> > > implement it as BMP? If I can do with CMP, does
> it mean that
> > > I have to make a loop
> > > to invoke home.create(UID, Type, Detail)?
> > >
> > > Thank you very much.
> > >
> > > -John
> > >
> >
> >
>
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>
>
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