It performs fairly good in Orion Server (it's what I most commonly use).
It's will most times be a lot faster than having a different Entity to hold
data (a table for data, and perhaps an extra table for relationships)
> -----Original Message-----
> From: Lauren Commons [mailto:[EMAIL PROTECTED]]
> Sent: Jueves, 01 de Febrero de 2001 17:48
> To: [EMAIL PROTECTED]
> Subject: Re: bean design problem for one to many relationship
>
>
> 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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>
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