jmeter unique id per thread for http request

Question

My jmeter tests make a http request which contains a unique id.

http://myserver.com/{uniqueId}/

I want to set the base number (say 35000) and increment for each thread, for example my ids would be 35001, 35002, 35003 ...

http://myserver.com/{base + count}

I see functions for __threadnum and __counter but how would I:

1. set it in a variable so that I can substitute it in my url
2. add this count to my base value

Answer 1

I would simply go with Beanshell pre processor.

int threadNo = ctx.getThreadNum()+1; //to get the thread number in beanshell
int base = 35000;
int uniqueId = threadNo + base;
vars.put("uniqueId", Integer.toString(uniqueId));

Now your HTTP requests as given below should have the value substituted.

http://myserver.com/${uniqueId}/

Answer 2

To set a variable per thread you can use User Defined Variables.

To sum, you can use functions:

• __intSum
• __longSum

Or use a JSR223 PRE Processor or JSR223 POST Processor + Groovy and do it in Groovy.