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Date: Thu, 6 Jan 2011 07:10:12 -0800 (PST)
From: zhouyuan <yzhou@microstrategy.com>
To: jmeter-user@jakarta.apache.org
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Subject: Re: How to get transaction time into a user defined variable?
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Felix Frank-2 wrote:
> 
> On 01/06/2011 06:43 AM, zhouyuan wrote:
>> 
>> 
>> Felix Frank-2 wrote:
>>>
>>>> No, I'm not trying to chopping off the last three digits, I just want
>>>> to
>>>> get
>>>> the transaction time through subtracting the 2 timestamps...but i
>>>> couldn't
>>>> do any operations on time1 and time2 directly. It seems that the time1
>>>> and
>>>> time2 are int variables by default? There are some extra lines just
>>>> because
>>>> I tried to debug this problem.
>>>
>>> The variables are untyped to BeanShell - their values are inserted
>>> verbatim (as numerals) into your script.
>>>
>>> Your log shows a "number too large" error, hence my suggestion to drop
>>> the milliseconds.
>>>
>>> Your computation of "long response1" should produce a valid timespan in
>>> milliseconds, I believe.
>>>
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>>>
>>>
>>>
>> 
>> Hi Felix,
>> 
>> The problem is that I can't do any computation on time2 and time1, you
>> suggest me to drop milliseconds through dividing them by 1000? Or do some
>> formatting with the time function?
>> I also tried like this:
>> int a=1;
>> ${__log(${a},OUT)};
>> int b=2;
>> ${__log(${b},OUT)};
>> int c=b-a;
>> ${__log(${c},OUT)};
>> But the console output is:
>> Log: Thread Group 1-1 : ${a}
>> Log: Thread Group 1-1 : ${b}
>> Log: Thread Group 1-1 : ${c}
>> 
>> Is there anything wrong with my script?
> 
> Careful: ${a} supposes that there is a variable *on the Test Plan level*
> that is named a (e.g., created by a RegexExtractor or
> UserDefinedVariables).
> 
> Before Jmeter sends your BSH Script to the interpreter, it substitutes
> all occurences of ${a} by the value of this Jmeter variable.
> 
> "int a=1" on the other hand creates a variable local to your BSH Script.
> The two types of variables can't be mingled.
> 
> To manipulate Jmeter variables, use the vars object from BSH.
> 
> From your earlier error logs, I assume time1 and time2 are actual Jmeter
> variables. To loose the milliseconds, I suggest using them as strings,
> chopping 3 characters using substr() or whatever that is in BSH and then
> parse it to a long value.
> 
> HTH,
> Felix
> 
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> 
> 
> 

I tried to create UDVs first and then do the computations above, but I still
can't get any output using __log function in the console. Could you give me
an example that works fine in basic computations and we can also watch the
variables in some way? Thanks!
-- 
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