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From "Ian Blavins" <iblav...@temenos.com>
Subject RE: Custom Sampler: Force all setupTest methods to be invoked before runTest methods
Date Mon, 23 Mar 2009 16:13:05 GMT
G'day

I wasn't suggesting static for the connection - just to control initialization.  Don't let
any thread exit from initialization until all have completed initialization. You will need
a static variable to keep count of threads that have initialized and a static synchronized
method to update it in a thread safe manner. You will also need to tell the sampler the number
of threads in the run. You may be able to get this from the environment with a method call
or you may have to pass it in.

There are probably other ways to do this if getting the number of threads in the run proves
awkward.



Ian Blavins
Software performance specialist
.
TEMENOS
The Banking Software Company
.
PeopleBuilding 2, Maylands Av
Hemel Hempstead   UK   HP2 4NW
.
T:  +44 (0) 1442 431 106
E:  iblavins@temenos.com
.
www.temenos.com
.


-----Original Message-----
From: paul.robinson.arjuna@googlemail.com [mailto:paul.robinson.arjuna@googlemail.com] On
Behalf Of Paul Robinson
Sent: Monday, 23 March 2009 4:09 PM
To: JMeter Users List
Subject: Re: Custom Sampler: Force all setupTest methods to be invoked before runTest methods

Hi,

Thanks for the quick reply. Static variables would be a good idea, however,
I require that each thread has it's own connection, in order to simulate
multiple separate users. Sharing a connection through a static variable
would break my test unfortunately.

For some reason, the system I am testing requires that all connections are
established before any of them are used. Therefore I really need to ensure
all the setupTest methods are invoked before any of the runTest methods are
invoked.

Thanks for the help,

Paul.


2009/3/23 Ian Blavins <iblavins@temenos.com>

> G'day
>
> Because they all run under one JVM all instances of the sampler within a
> JMeter server can share memory through static variables.
>
> If you are familiar with static variables that should be enough to get you
> going.
>
>
> Ian Blavins
> Software performance specialist
> .
> TEMENOS
> The Banking Software Company
> .
> PeopleBuilding 2, Maylands Av
> Hemel Hempstead   UK   HP2 4NW
> .
> T:  +44 (0) 1442 431 106
> E:  iblavins@temenos.com
> .
> www.temenos.com
> .
>
> -----Original Message-----
> From: paul.robinson.arjuna@googlemail.com [mailto:
> paul.robinson.arjuna@googlemail.com] On Behalf Of Paul Robinson
> Sent: Monday, 23 March 2009 2:59 PM
> To: jmeter-user@jakarta.apache.org
> Subject: Custom Sampler: Force all setupTest methods to be invoked before
> runTest methods
>
> Hello,
>
> I have written a Custom Sampler by extending "AbstractJavaSamplerClient".
> My
> sampler is very simple, it just logs the method being invoked.
>
> If i run the sampler for 2 threads with "loop count" of 1, I see the
> following output:
>
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler Constructor
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler setupTest
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler runTest
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler Constructor
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler setupTest
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler runTest
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler teardownTest
> INFO  03/23, 02:49:18 hat.test.jms.test.DummySampler teardownTest
>
> Here you will observe that the "runTest" method of the first thread is
> invoked before the "setupTest" of the 2nd thread. For my test I need to
> ensure that all threads have their setupTest method invoked before any of
> them have their "runTest" method ivoked.
>
> Does anyone know how I can do this?
>
> Thanks,
>
> Paul.
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> TEMENOS accepts no liability for any damage caused by any malicious code
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-- 
Dr Paul Robinson
Senior Consultant Engineer
Arjuna Technologies Ltd

Tel: +44 191 243 0676
Mob: +44 772 920 7346
Fax: +44 191 243 0677
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Disclaimer:
If you have received this e-mail in error please notify the sender. 
Please note that any views or opinions presented in this e-mail are solely 
those of the author and do not necessarily represent those of TEMENOS. 
We recommend that you check this e-mail and any attachments against viruses. 
TEMENOS accepts no liability for any damage caused by any malicious code 
or virus transmitted by this e-mail.


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