True, but
I still tend to think that with the neat way EJB envisions(spelling?) to
solve the distributed computing problem, it is here to stay for a long time.
And when there have been well defined core EJBs for most enterprises(don't
they all use similar business logic?)we should achieve OO's dream of (a high
percentage ) code reuse,and then ordinary beans should really die.
apollo
-----Original Message-----
From: Jim Preston [mailto:[EMAIL PROTECTED]]
Sent: Monday, June 05, 2000 5:54 PM
To: [EMAIL PROTECTED]
Subject: Re: EJB and JavaBeans
I don't think it's a question of replacing. EJBs are essentially a super-set
of ordinary beans, and the latter will certainly have their place in the
scheme of things for a while to come. Besides, ordinary beans aren't really
a "thing", it's more a set of conventions that enable a Java class to be
used in certain ways, like being called from the get/setProperty tag of a
jsp. Finally, EJBs require an EJB-enabled server, so their use is more
restricted. Look at it this way: electric screwdrivers have many advantages
over the old manual kind, but you can still buy both in the stores, and
sometimes a manual one is better suited to the job at hand (no pun
intended).
--Jim Preston
> -----Original Message-----
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Apollo Mcowiti
> Sent: Monday, June 05, 2000 3:13 PM
> To: [EMAIL PROTECTED]
> Subject: Re: EJB and JavaBeans
>
>
> Thanks.
> seems then SUn will replace beans with EJB , given the
> advantages of EJBs??
>
> -----Original Message-----
> From: Alex Strasheim [mailto:[EMAIL PROTECTED]]
> Sent: Monday, June 05, 2000 4:54 PM
> To: [EMAIL PROTECTED]
> Subject: Re: EJB and JavaBeans
>
>
> > Apart from EJB being a "biz" bean what functional differences exist
> between
> > the two?
>
> (I'm not a guru, so I could be wrong...)
>
> Normal beans are just plain old software components. They let you
> take code out of your JSP page so your web designers won't get
> confused, and they can communicate with other JSP pages that live in
> the same JVM on your application server.
>
> EJBs are specialized components that can count on having a variety of
> services available from an EJB container. Those services make the
> components well suited for distributed enterprise computing. The EJB
> containers make it possible for EJBs to communicate with processes on
> other machines in a secure and orderly way. If you wanted to do the
> same sorts of things on an MS system, you'd probably use MTS. And if
> you wanted to make a scalable JSP system, you might need to use EJBs
> so that pages running in different JVMs can communicate with one
> another.
>
> I looked at an EJB book at the store, but the first thing it said was
> that it was a hard subject to tackle, so I decided to spend more time
> with JSP and plain old beans before I dove in to EJBs. They do seem
> to be easier to figure out than MTS, though, although I say that as a
> person who hasn't learned either technology.
>
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