Hi,
but I must communicate with a server application that lies in an
another machine, the server application is a intrinsic part, and it only has
the socket interface, I cannot modify it. In my project, a part of my date
lies in a database, but another part lies in a close environment that must
be accessed through that server application. So I must access some through
entity bean and some through sockets. For hiding the difference of the two
ways of accessing data, I want to write sockets in my entity beans also. And
I need not take care of transaction, because the socket server application
can do it automatically.
++++++++++++++++++++++++++++
Shanghai Huateng Software Systems Co., Ltd.
418 Gui Lin Road
Shanghai, P.R.China 200233
Tel : +86-21-6451-3533-11
Fax : +86-21-6472-8625
E-mail : [EMAIL PROTECTED]
Web : http://www.huateng.com
http://www.chinapay.com
> ----------
> From: Jonas Wallenius[SMTP:[EMAIL PROTECTED]]
> Reply To: A mailing list for Enterprise JavaBeans development
> Sent: Friday, July 7, 2000 5:40 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Socket in Entity Bean
>
> Afaik you _could_, but it wouldn't be transactional (not a problem for
> read-only operations I suppose), you expose yourself to more potential
> exception sources (=higher risk your bean might mess up transactions it
> partakes in unless the network the socket call is made over can be
> considered
> reliable), and I guess there might be potential problems if the remote end
> blocks for a long time or so... It shouldn't be too hard to put together a
> very
> simple test environment to find out, though?
>
> /Jonas
>
> On Fri, 7 Jul 2000, yu_robin wrote:
>
> > Hi canals,
> > Yes, I want to make an ejb that acts as a client using sockets,
> I
> > know that I can write client sockets in my ejbs but not server sockets,
> but
> > the problem is that whether I can implement the ejb's ejbCreate(),
> > ejbRemove(), ejbStore() and other methods through my client sockets
> sending
> > data to and receiving data from a remote server socket, just as
> connecting
> > to a database connection pool and make some sql operation.
> >
> > thanks.
> >
> >
> > ++++++++++++++++++++++++++++
> > Shanghai Huateng Software Systems Co., Ltd.
> > 418 Gui Lin Road
> > Shanghai, P.R.China 200233
> > Tel : +86-21-6451-3533-11
> > Fax : +86-21-6472-8625
> > E-mail : [EMAIL PROTECTED]
> > Web : http://www.huateng.com
> > http://www.chinapay.com
> >
> > > ----------
> > > From: Luis F. Canals[SMTP:[EMAIL PROTECTED]]
> > > Reply To: A mailing list for Enterprise JavaBeans development
> > > Sent: Friday, July 7, 2000 2:45 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Socket in Entity Bean
> > >
> > > Hello Robin,
> > > If you want to listen (like a server) on a socket, you can't
> do it
> > > whit
> > > EJB (see Enterprise JavaBeans Specification, chap. 18, sec. 18.1.2.
> -you
> > > can
> > > download from http://java.sun.com/products/ejb/docs.html). If you want
> to
> > > make an EJB that acts as a client using sokects (I think this is
> you're
> > > trying, don't you?), the specification permits you.
> > >
> > > Regards.
> > >
> > > Luis F. Canals Samaniego
> > > CEDETEL
> > > Parque Tecnol��(r)gico de Boecillo
> > > Edificio Centro, Parcela 109
> > > E-47151 Boecillo (Valladolid)
> > > SPAIN
> > >
> > > Tfno: +34 983 54 65 02
> > > Fax: +34 983 54 66 96
> > >
> > >
> > > -----Mensaje original-----
> > > De: A mailing list for Enterprise JavaBeans development
> > > [mailto:[EMAIL PROTECTED]]En nombre de yu_robin
> > > Enviado el: viernes 7 de julio de 2000 8:05
> > > Para: [EMAIL PROTECTED]
> > > Asunto: Socket in Entity Bean
> > >
> > >
> > > Hi everyone,
> > > I have some data that must be fetched from a remote host through
> socket,
> > > and some others from a db. I want to hide the difference between
> these
> > > two
> > > ways of getting data upon the entity bean layer��? then session beans
> can
> > > get
> > > data through entity beans uniformly. Can I write socket in my bean
> managed
> > > entity beans?
> > > pls help me.
> > > thanks.
> > >
> > > robin
> > > ++++++++++++++++++++++++++++
> > > Shanghai Huateng Software Systems Co., Ltd.
> > > 418 Gui Lin Road
> > > Shanghai, P.R.China 200233
> > > Tel : +86-21-6451-3533-11
> > > Fax : +86-21-6472-8625
> > > E-mail : [EMAIL PROTECTED]
> > > Web : http://www.huateng.com
> > > http://www.chinapay.com
> > >
> > >
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> > >
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> >
> >
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