Where to put Bo's, Pd's ?

Leif Eirik Olsen

Delphi Developer

Tue, 04 Nov 2003 22:05:31 GMT

Where to put Bo's, Pd's ?

Hi all,

I've read Philip Brown's series of articles (great!) available in code
central, and now I'm trying to figure out what this can do for me.
I mainly develop 3 tier applications using Midas, and my question is related
to this,

Where do one put thoose BO's or PD's that Philip is talking about :
1. Client App,
2. Server App,
3. Both,

Thanks,
Leo

Phil Shrimpto

Delphi Developer

Tue, 04 Nov 2003 22:19:04 GMT

Re:Where to put Bo's, Pd's ?

Quote

In article <3b052c24$1_2@dnews>, le...@wmdata.no wrote...

Hi,

Quote

> Where do one put thoose BO's or PD's that Philip is talking about :
> 1. Client App,
> 2. Server App,
> 3. Both,

Depends if you want a fat or thin client. I usually put them on the
server and export the interface (using DCOM or Corba) to the client.

Cheers

Phil

Thomas Andersso

Delphi Developer

Wed, 05 Nov 2003 01:39:35 GMT

Re:Where to put Bo's, Pd's ?

Where can I find Philip Brown's articles that everybody except me has read?

Thomas Andersson

"Leif Eirik Olsen" <le...@wmdata.no> wrote in message
news:3b052c24$1_2@dnews...

Quote

> Hi all,

> I've read Philip Brown's series of articles (great!) available in code
> central, and now I'm trying to figure out what this can do for me.
> I mainly develop 3 tier applications using Midas, and my question is
related
> to this,

> Where do one put thoose BO's or PD's that Philip is talking about :
> 1. Client App,
> 2. Server App,
> 3. Both,

> Thanks,
> Leo

Alexander Myachi

Delphi Developer

Wed, 05 Nov 2003 03:43:42 GMT

Re:Where to put Bo's, Pd's ?

Hi Phil

Quote

> > Where do one put thoose BO's or PD's that Philip is talking about :
> > 1. Client App,
> > 2. Server App,
> > 3. Both,

> Depends if you want a fat or thin client. I usually put them on the
> server and export the interface (using DCOM or Corba) to the client.

Both DCOM and Cobra instist on using "stateless" objects
Client side objects are usually "statefull". This is basicaly what makes
implementations of BOs for (1) and (2) so different.

Alexander Myachin

wangw

Delphi Developer

Wed, 05 Nov 2003 04:05:32 GMT

Re:Where to put Bo's, Pd's ?

http://codecentral.borland.com/codecentral/ccweb.exe/listing?id=15511

Quote

"Thomas Andersson" <thomas.anders...@bluelabs.se> wrote in message

news:3b055e4c_2@dnews...

Quote

> Where can I find Philip Brown's articles that everybody except me has
read?

> Thomas Andersson

> "Leif Eirik Olsen" <le...@wmdata.no> wrote in message
> news:3b052c24$1_2@dnews...
> > Hi all,

> > I've read Philip Brown's series of articles (great!) available in code
> > central, and now I'm trying to figure out what this can do for me.
> > I mainly develop 3 tier applications using Midas, and my question is
> related
> > to this,

> > Where do one put thoose BO's or PD's that Philip is talking about :
> > 1. Client App,
> > 2. Server App,
> > 3. Both,

> > Thanks,
> > Leo

Leif Eirik Olse

Delphi Developer

Fri, 07 Nov 2003 17:52:00 GMT

Re:Where to put Bo's, Pd's ?

Quote

"Phil Shrimpton" <p...@nospam.co.uk> wrote in message

news:MPG.156f3fae4b6e9f119896f3@newsgroups.borland.com...

Quote

> Depends if you want a fat or thin client. I usually put them on the
> server and export the interface (using DCOM or Corba) to the client.

Using Interfaces; does this result in one call to AppServer for every
property read from any object ?

Thanks,
Leo

Phil Shrimpto

Delphi Developer

Sat, 08 Nov 2003 06:11:50 GMT

Re:Where to put Bo's, Pd's ?

Quote

In article <3b08e548_2@dnews>, le...@wmdata.no wrote...

Hi,

Quote

> > Depends if you want a fat or thin client. I usually put them on the
> > server and export the interface (using DCOM or Corba) to the client.

> Using Interfaces; does this result in one call to AppServer for every
> property read from any object ?

I am no DCOM expert, but using Corba, when you create an instance of the
Object, it is actually creating it on the server, so reading/writing to
it will go across the wire.

Cheers

Phil

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