COM+ / NET Components

[Lula.Pro]

Hi,

I need to create some .Net components to run in COM+ and works with ASP.NET
Pages, mostly because of security (the client demand that the web
application have to be separated of the bussiness tie, for many reasons
beside security, like scabillity). I made a lot of tests, and nothing seems
to work. I just wanna create an DLL in .NET (in VB.Net), register in the
COM+ of the application server , export a package to the IIS server and call
it in ASP.NET Pages using the CreateObject command. I know that seems
different of the porpouse of .NET, but it's work. If I have some MS
documentation that explain "this is a bad idea", it will help me a lot too.

I will not use any early techonologiem like VB6 components. I'm using
Framework 3.5, with VB.Net and ASP.Net. There's some VB dlls calling each
other (also with Create Object) and the ASp.Net WebSite, in a Different
server.

What's the best pratice to do this?

Thanx in Advance !

 

[Gregory A. Beamer]

Hi,

I need to create some .Net components to run in COM+ and works with
ASP.NET Pages, mostly because of security (the client demand that the
web application have to be separated of the bussiness tie, for many
reasons beside security, like scabillity). I made a lot of tests, and
nothing seems to work. I just wanna create an DLL in .NET (in VB.Net),
register in the COM+ of the application server , export a package to
the IIS server and call it in ASP.NET Pages using the CreateObject
command. I know that seems different of the porpouse of .NET, but it's
work. If I have some MS documentation that explain "this is a bad
idea", it will help me a lot too.

You don't have to go through this for true separation of tiers. If you want
a separate application server, there are other ways to solve the boundary
problem than mixing COM and .NET. And, I would argue, more superior ways to
do it.

If you look at Juval Lowy's work, the idea of setting up a WCF service over
the libraries works very nicely for this type of separation. And, you incur
less overhead than your proposed solution, which is:

ASP.NET
calls COM+
calls distributed system using COM+
calls your .NET assembly on the other machine
calls interop to native methods
etc.

At least with the WCF service approach, you end up with this:

ASP.NET calls WCF business tier component
WCF calls local .NET componet (all .NET)
..NET calls interop where needed for native methods

Your overhead, via latency, is pretty much equivalent, but the interop back
and forth eats up cycles, thus destroying part of the scalability you
achieve from putting the business tier on another machine.

If you MUST head this direction, something like .NET Reactor may be a
better option for creating true native code from .NET. LSW was also looking
into native with their Lab product and I think remote soft has something
along these lines in their product (although I still do not think it is
truly native code). I would still advise against this, as you can set up
the security and scalability in true .NET without jumping through this
hoop.

--
Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

Twitter: @gbworld
Blog: http://gregorybeamer.spaces.live.com

*******************************************
| Think outside the box! |
*******************************************

 

[Lula.Pro]

Hi Gregory ! Thank you for help!

If you look at Juval Lowy's work, the idea of setting up a WCF service
over
the libraries works very nicely for this type of separation.

Thank you for the tip, i will search about it. I need to understand how the
WCF service can be exported or called from another machine. I don't know WCF
so much, but the ideia seems great. If the service works under a validation
of users (like COM+, to start / stop processes), this is just what I need.

If you MUST head this direction, something like .NET Reactor may be a
better option for creating true native code from .NET.

But It's possible to created the web site application as i told ? Just for
curiosity, cause i will follow the WCF Service idea (If my client aprove it)
.. I searched about .Net Reactor, and don't really understand how it works.

Thanx again for yout time and patience!

 

[Gregory A. Beamer]

But It's possible to created the web site application as i told ? Just
for curiosity, cause i will follow the WCF Service idea (If my client
aprove it) . I searched about .Net Reactor, and don't really
understand how it works.

Tehcnically, you can use COM+ to separate your layers, but it is a lot of
overhead to do all of the interop necessary, so I would not do it.


--
Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

Twitter: @gbworld
Blog: http://gregorybeamer.spaces.live.com

*******************************************
| Think outside the box! |
*******************************************