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From Michael Morris <>
Subject RE: Parsing for variable
Date Tue, 26 Feb 2002 13:11:21 GMT

I was directed to this message by Timothy Reaves.

I have been trying to work though the documentation and am sure that either
the Modefication Manager is not designed to do what I want or (more likely)
I do not understand how to use it.

I am trying to use JMeter to create a database record and then to pick up
its id and feed it back in order to edit it. Here is what I have built

          +-+ ThreadGroup
            +-+ Simple controller
            | |
              +-- Web testing - login
            | |
            | +-- Web Testing - create record
            +-+ Modification Manager
              +-- HTML Link parser
              +-- Web Testing - edit record

I have tried it on the latest 1.7 release (25th Feb 2002)

Does anyone know what I am doing wrong.

-----Original Message-----
From: Stover, Michael []
Sent: 20 February 2002 14:41
To: 'JMeter Users List'
Subject: RE: Parsing for variable

Yes, you can do this.  

Firstly, read

Hopefully, that page will explain what you need to do.  If you have further
questions, let me know.  I will say that, in the latest build, it works
quite well.  However, it is very exacting, and I usually have to do some
work to figure out how to make it work.  The errors are generally mine


> -----Original Message-----
> From:
> []
> Sent: Wednesday, February 20, 2002 8:12 AM
> To:
> Subject: Parsing for variable
>      Hello all.  The latest nightly build seems to work very 
> well, fixing
> several issues that had been preventing me from using it.  
> Now I can use it
> to record scripts, and play them back.  But I have a question.
>      In the application I'm wanting to test (JSP based), at 
> one point in
> the process an ID number is created, and added to the data going from
> client to server.  It then is part of the further requests.  
> The problem
> is, every time I play the script back, a new ID is generated 
> (as should
> be), but the recorded script uses the old value in subsequent 
> requests.  So
> the question is: how do I scrape that value and replace it in 
> the later
> requests?
>      Is there some mechanism for something like variable 
> substitution?  In
> the product we currently use, after recording the script, you 
> can go in and
> edit it to scrape a value returned by the web server and place it in a
> variable.  Then anywhere else in the script you want to use 
> that variable,
> you delete what is there (the old value) and put the variable 
> name there.
> This way, each run of the script uses the ID created for that run.
>      Anyone?
> --
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