Hello!
I am using JMeter now for a few days now, and I have to say: great software,
I like it very much! Thank you for your work.
I have the task to "synchronise" the different threads of a thread group.
The aim is, that after several steps in our web application (login procedure
etc.) all threads execute the same HTTPS-request nearly at the same time (in
between 1 to 2 seconds).
To be more specific: Let's say I have 3 users in parallel and all start
their work at 08:00:00. The first user finishes its work at 08:02:05, the
second at 08:03:45 and the third at 08:04:15. How can I achieve the goal, so
that all users (HTTP-sessions have to be kept) set a HTTP-request at
08:05:00 ?
Since I could not find any suitable JMeter component, I thought about
different approaches.
1. Approach:
============
First I tried to set the synchronized time (in the example above 08:05:00)
with predefiend variables ('s_' stands f�r 'synchronized')
s_year = 2005
s_month = 2
s_day = 23
s_hour = 8
s_minute = 5
s_second = 0
In addition with a WHILE-Controller and a Delay-Timer (100 ms) as a child of
this WHILE-Controller, a JavaSript-Function should return true, if the
actual time:
${__javaScript(if (new Date().getTime() > Date.UTC(${s_year}, ... ,
$(s_second)) return true,)}
Well the problem is, that new Date().getTime() works perfectly, but
Date.UTC(...) doesnt. It is not executed, whatever I try: (even new
Date().UTC(...)
2. Approach:
============
I tried to use the BSF-Sampler in order to have more scripting capabilities.
But I have no idea how to use it, since the documentation of the BSF is not
really "user friendly". I am no Java-programmer. I have the
bsf.jar file and the jpython.jar file (since I'd like to use Python, but it
could be JavaScript too..)
The thing I'd like to know is, how can I get the BSF to run? Where do I have
to put the jars (bsf.jar, jython.jar), what entries do I have to put in the
BSF-Sampler what else do i have to do in order to execute the following
(testing) python scrtipt.
# --- python start ---
# import the module time
import time
# delay execution for 10 secondes
time.sleep(10)
# --- python script end ---
I would paste this testing peace of code in the "Script to run" - Box
and set the "Scripting language:" to "jython".
I'd prefer the 2nd approach over the first, in order to have the
jython-capabilities...
3. Approach:
============
Do you know any other possibilities to synchronize threads?
Thank you very much,
Leo
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