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asp_components thread: Why and When use COM???
Message #1 by walter@w... on Thu, 1 Nov 2001 14:59:36
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Can someone explain when i shut use COM and when not?
Message #2 by Robert Chartier <rchartierh@a...> on Thu, 01 Nov 2001 09:18:21 -0800
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all you need to do is keep in mind one thing:
ASP is a hack.
What i mean by that is that it has such little support for really
everything. Sure you can get a COM here and there to do your things, but
really its pretty useless. Dont worry, so is PHP. JSP is much better, for
every reason. Then we get into .NET (DONE RIGHT), it is a huge upgrade
(better solution) than most realize.
Consider this...
http://www.15seconds.com/issue/011023.htm
COM could exists at pretty much at all layers.
But realistically, consider it for these layers:
Distributed Logic
Proxy Tier
Business Tier
Data Access Tier
....discuss more...
/rob
At 02:59 PM 11/1/2001 +0000, you wrote:
>Can someone explain when i shut use COM and when not?
>
Robert Chartier
Author and Developer
xxx-xxx-xxxx
rob@a...
http://www.aspfree.com/devlinks
http://www.aspfree.com/authors/robert
http://www.aspalliance.com/nothingmn
http://www.15seconds.com/issue/wa.htm#chartier
Message #3 by "Lewis, James" <James.Lewis@i...> on Thu, 1 Nov 2001 10:40:11 -0700
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Personally I incorporate my own COM controls for the following reasons:
- I need the performance from a compiled component as compared to scripted
hosts such as IIS
o I have a control that generates several thousand .ini files based
on some database settings. This control uses the direct win32 API file
generation (written in C++/ATL). Just by moving away from the file-system
object we realized a 2x speed increase. Improvements in the algorithms
realized yet another 2x increase. This environment also allows me to utilize
threads.
- I need hyper close control over security, such as instantiation a DCOM
control under specific permissions on specific machines.
o I wrote an ATL control that instantiates objects on remote
machines. The control takes a user ID, domain, and password which guarantees
that the SCM will not receive a NULL ACL on the remote machine. This has
been highly useful for me when I wanted to restrict a control that needs
full file system access to only one share.
- I need a highly distributed DCOM environment that is more sophisticated
that IIS or DCOMCNFG could hope to achieve.
o There's only so much DCOMCNFG can do - for more sophisticated DCOM
environments, such as say a custom load balancing environment that
piggybacks on the Windows2000 browser for location of remote servers, a
scripted environment is hopeless.
- I need access to an O/S call or other low-level service that can only be
obtained at the Win32 level
o I have a hyper file-copy control that uses multiple threads an
overlapped I/O to copy up to 10,000 files to a distribution server. The
control is triggered from IIS but internally uses low-level API's including
overlapped I/O, thread pooling, etc.
J
-----Original Message-----
From: walter@w... [mailto:walter@w...]
Sent: Thursday, November 01, 2001 8:00 AM
To: ASP components
Subject: [asp_components] Why and When use COM???
Can someone explain when i shut use COM and when not?
$subst('Email.Unsub')
Message #4 by "Michael Paul ( LTI )" <MichaelP@l...> on Thu, 1 Nov 2001 14:17:59 -0800
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Kinda Off the Subject but...
I just heard from a friend that he was told that the .NET runtime was faster
then COM/ATL. He heard this at the .NET show-tell thing in LA last week. Has
anyone heard this as well??. I would find this ALMOST impossible. He also
said
that the Microsoft was moving away from COM+ in the .NET architecture.
-----Original Message-----
From: Lewis, James [mailto:James.Lewis@i...]
Sent: Thursday, November 01, 2001 9:40 AM
To: ASP components
Subject: [asp_components] RE: Why and When use COM???
Personally I incorporate my own COM controls for the following reasons:
- I need the performance from a compiled component as compared to scripted
hosts such as IIS
o I have a control that generates several thousand .ini files based
on some database settings. This control uses the direct win32 API file
generation (written in C++/ATL). Just by moving away from the file-system
object we realized a 2x speed increase. Improvements in the algorithms
realized yet another 2x increase. This environment also allows me to utilize
threads.
- I need hyper close control over security, such as instantiation a DCOM
control under specific permissions on specific machines.
o I wrote an ATL control that instantiates objects on remote
machines. The control takes a user ID, domain, and password which guarantees
that the SCM will not receive a NULL ACL on the remote machine. This has
been highly useful for me when I wanted to restrict a control that needs
full file system access to only one share.
- I need a highly distributed DCOM environment that is more sophisticated
that IIS or DCOMCNFG could hope to achieve.
o There's only so much DCOMCNFG can do - for more sophisticated DCOM
environments, such as say a custom load balancing environment that
piggybacks on the Windows2000 browser for location of remote servers, a
scripted environment is hopeless.
- I need access to an O/S call or other low-level service that can only be
obtained at the Win32 level
o I have a hyper file-copy control that uses multiple threads an
overlapped I/O to copy up to 10,000 files to a distribution server. The
control is triggered from IIS but internally uses low-level API's including
overlapped I/O, thread pooling, etc.
J
-----Original Message-----
From: walter@w... [mailto:walter@w...]
Sent: Thursday, November 01, 2001 8:00 AM
To: ASP components
Subject: [asp_components] Why and When use COM???
Can someone explain when i shut use COM and when not?
$subst('Email.Unsub')
$subst('Email.Unsub')
Message #5 by "Lewis, James" <James.Lewis@i...> on Fri, 2 Nov 2001 09:49:51 -0700
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Yeah. My take on this is that .NET is partially advertising - if you look up
lots of the .NET documentation it's just re-packaged COM and Win32
interfaces. I'm betting that what this means is .NET is providing easier
access to the underlying infrastructure, but the underlying technology,
calling what you like, is still RPC or COM or whatever. For example, the RPC
interface to services is still the same as it was back in NT4.... and deep
down under the covers where nobody wants to look, message pumps are alive
and well :o)
-----Original Message-----
From: Michael Paul ( LTI ) [mailto:MichaelP@l...]
Sent: Thursday, November 01, 2001 3:18 PM
To: ASP components
Subject: [asp_components] RE: Why and When use COM???
Kinda Off the Subject but...
I just heard from a friend that he was told that the .NET runtime was faster
then COM/ATL. He heard this at the .NET show-tell thing in LA last week. Has
anyone heard this as well??. I would find this ALMOST impossible. He also
said
that the Microsoft was moving away from COM+ in the .NET architecture.
-----Original Message-----
From: Lewis, James [mailto:James.Lewis@i...]
Sent: Thursday, November 01, 2001 9:40 AM
To: ASP components
Subject: [asp_components] RE: Why and When use COM???
Personally I incorporate my own COM controls for the following reasons:
- I need the performance from a compiled component as compared to scripted
hosts such as IIS
o I have a control that generates several thousand .ini files based
on some database settings. This control uses the direct win32 API file
generation (written in C++/ATL). Just by moving away from the file-system
object we realized a 2x speed increase. Improvements in the algorithms
realized yet another 2x increase. This environment also allows me to utilize
threads.
- I need hyper close control over security, such as instantiation a DCOM
control under specific permissions on specific machines.
o I wrote an ATL control that instantiates objects on remote
machines. The control takes a user ID, domain, and password which guarantees
that the SCM will not receive a NULL ACL on the remote machine. This has
been highly useful for me when I wanted to restrict a control that needs
full file system access to only one share.
- I need a highly distributed DCOM environment that is more sophisticated
that IIS or DCOMCNFG could hope to achieve.
o There's only so much DCOMCNFG can do - for more sophisticated DCOM
environments, such as say a custom load balancing environment that
piggybacks on the Windows2000 browser for location of remote servers, a
scripted environment is hopeless.
- I need access to an O/S call or other low-level service that can only be
obtained at the Win32 level
o I have a hyper file-copy control that uses multiple threads an
overlapped I/O to copy up to 10,000 files to a distribution server. The
control is triggered from IIS but internally uses low-level API's including
overlapped I/O, thread pooling, etc.
J
-----Original Message-----
From: walter@w... [mailto:walter@w...]
Sent: Thursday, November 01, 2001 8:00 AM
To: ASP components
Subject: [asp_components] Why and When use COM???
Can someone explain when i shut use COM and when not?
$subst('Email.Unsub')
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