G'day I had the same problem.
I define a user defined variable to hold the thread count. I populate the Number of Threads field on the thread group from the UDV (the field accepts an expression). Then you have the thread count in a variable which you can give to the sampler in the normal way without having two places to update the thread count. 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: [email protected] . www.temenos.com . -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Paul Robinson Sent: Monday, 23 March 2009 4:19 PM To: JMeter Users List Subject: Re: Custom Sampler: Force all setupTest methods to be invoked before runTest methods Ian, I see what you mean now. We have considered this approach already and we plan to use it as a fall back. The problem with the approach is as you suggest, you need to tell the sampler how many client threads to expect. I've inspected the JavaSamplerContext and can't find a thread count. Thanks, Paul. 2009/3/23 Ian Blavins <[email protected]> > 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: [email protected] > . > www.temenos.com > . > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] 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 <[email protected]> > > > 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: [email protected] > > . > > www.temenos.com > > . > > > > -----Original Message----- > > From: [email protected] [mailto: > > [email protected]] On Behalf Of Paul Robinson > > Sent: Monday, 23 March 2009 2:59 PM > > To: [email protected] > > 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. > > 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. > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > > -- > Dr Paul Robinson > Senior Consultant Engineer > Arjuna Technologies Ltd > > Tel: +44 191 243 0676 > Mob: +44 772 920 7346 > Fax: +44 191 243 0677 > Web: www.arjuna.com > > Registered Office: Floor A, Milburn House, Dean Street, Newcastle upon > Tyne, NE1 1LE > > VAT Registration No: 764173128. Company registered in England > > Registration No: 4497081 > 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. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Dr Paul Robinson Senior Consultant Engineer Arjuna Technologies Ltd Tel: +44 191 243 0676 Mob: +44 772 920 7346 Fax: +44 191 243 0677 Web: www.arjuna.com Registered Office: Floor A, Milburn House, Dean Street, Newcastle upon Tyne, NE1 1LE VAT Registration No: 764173128. 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