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Robert MacLean · Guest

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H

I'm trying to clear up something.
A property on webmodule is a global var, but to that thread only, but
a real global var is common to all threads?

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Robert MacLean
[email]robert (AT) sadev (DOT) co.za[/email]
http://www.sadev.co.za
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Dave Hackett · Guest

Not quite. A property on a WebModule is local to that web module - not a
global var.

If you created another unit and wanted to access a property inside the web
module, you would have to reference it like this...

Count := WebModule1.Actions.Count;

Each Action Handler and Tag Substitution method you create is a member of
the WebModule object, so they all have access to web module properties -
which is why your probably confused.

DaveH

"Robert MacLean" <robert (AT) nospam (DOT) sadev.co.za> wrote

Robert MacLean · Guest

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Dave Hackett was moved enough, that he took time and energy to create
the a news post (which will probebly come back to haunt him in the
future):

Dave Hackett · Guest

Not quite sure I'm following...

Instances of WebModules are not inside a Thread. WebBroker declares a
WebApplication object. It contains a TList of Active WebModules and a TList
of InActive WebModules. When a request comes in, WebApplication grabs an
InActive WebModule, moves it to the Active list and asks it to handle the
request. When its done, it moves it back to the InActive list. If there is
no WebModule in the InActive TList, it creates one.

So, having said that, variables declared within the TWebModule are global to
all methods inside the TWebModule.

Variables declared within a Unit and under the "Implementation" heading are
global to that unit, no matter if its referenced from a procedure, function
or a method of some object implemented in that unit.

Variables declared within a Unit and above the "Implementation" heading are
global to that unit - and all units that "Use" that unit, again no matter if
its referenced from a procedure, function or a method of some object
implemented in any of the units.

Now, if you create a new TThread object and declare a variable within it and
declare a TWebModule within it as well, the variable is global to the Thread
such that methods of that thread can access it, but it's not global to the
WebModule.

Eg.
TMyThread = class(TThread)
Name : string
WebModule : TWebModule;
procedure Execute;
end;

Execute can access Name and WebModule, but the code inside WebModule has no
access to the thread or the variables inside the thread. For that matter,
TWebModule would be declared in a separate unit, so see the rules above.

Maybe I'm just mudding the waters...

Sorry for the long response.
DaveH

"Robert MacLean" <robert (AT) nospam (DOT) sadev.co.za> wrote

Robert MacLean · Guest

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Dave Hackett was moved enough, that he took time and energy to create
the a news post (which will probebly come back to haunt him in the
future):

Dave Hackett · Guest

Yes.

DaveH

"Robert MacLean" <robert (AT) nospam (DOT) sadev.co.za> wrote