On 1 July 2014 08:22, Sam Drew <sam.d...@forgerock.com> wrote:
> I’m trying to write a custom JMeter module, that will run a Java method that 
> I use for Server Setup and returns Map<String,String> as configuration 
> properties that can be used in sampling.

How are you going to use the Map?

Why are the exsisting facilities for providing input to threads not sufficient?

For example,
http://jmeter.apache.org/usermanual/component_reference.html#CSV_Data_Set_Config
http://jmeter.apache.org/usermanual/functions.html#__StringFromFile

> At the moment I am slightly unsure of what TestElement I should be extending 
> or implementing in order to achieve this, given that it seems to sit 
> somewhere between a PreProcessor and ConfigTestElement, in that it is both 
> setting up pre-conditions for the test and then providing these as 
> configuration parameters.
>
> After looking at the example in jmeter-plugins for csv config element I wrote 
> a class which was little more than
>
> class CreateMyServerConfig extends Arguments {
>     @Override
>     public Map<String, String> getArgumentsAsMap() {
>         return ServerInstance.getServerInstance().getPropertiesAsMap();
>     }
> }
>
> Where getServerInstance would first generate a VM Instance and later just 
> provide a reference to the one created. When I tried to run a test plan with 
> it in the code never appeared to be executed, and I never really knew what to 
> expect. And whether/when this code might be called (particularly as I only 
> really want it run once).
>
> I was hoping that someone might be able to tell me which path to follow, 
> whether I’m barking up the wrong tree and which resources might be helpful. I 
> have looked at https://jmeter.apache.org/extending/jmeter_tutorial.pdf, have 
> seen various information relating to building custom samplers, and have even 
> used the Java Request Sampler in the past, however this has me completely 
> stumped.
>
> Alternatively a way to deal with JMeter’s configuration such that I could 
> embed JMeter in a jar and load the config from classpath would allow me to 
> run the code manually before starting JMeter from within Java.
>
> Thanks,
>
> Sam.

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