Cannot get value from Regular Expression Extractor and using in BeanShell PostProcessor

Question

I have a problems while picking up variables set by the Regular Expression Extractor in a Beanshell.

The result of Regular Expression Extractor:

JMeterVariables:
JMeterThread.last_sample_ok=true
JMeterThread.pack=org.apache.jmeter.threads.SamplePackage@120cc173
START.HMS=090316
START.MS=1507255396987
START.YMD=20171006
TESTSTART.MS=1507266934916
returnLink=not found
returnLink_1=/tripper/payment/info?booking=KD6YGS4L8I
returnLink_1_g=1
returnLink_1_g0="returnLink":"/tripper/payment/info?booking=KD6YGS4L8I"
returnLink_1_g1=/tripper/payment/info?booking=KD6YGS4L8I
returnLink_matchNr=1

Now I want to using returnLink_1 in Beanshell, but I cannot get And print it out. Actually, I want to get "KD6YGS4L8I" from the string but I can't.

int size = Integer.parseInt(vars.get("returnLink_matchNr")); // to get size of matched values
log.info("size is:" + size ); // you can remove log stmts once it is working

String url = vars.get("returnLink_1");
log.info("link:", url);
vars.put("BookingCode",url); // store in Booking code and use for next thread

I'm a newbie in JMeter. Please help me.

Answer 1

As Rohan already states: you should use "1" and not "-1"

It would be better that your expression would look like

booking=(.+?)"

as that would extract only the code you are looking for and it is returned in the defined variable ready for further use (assuming that the string is always the same of course apart from your code, otherwise you have to adapt your regex accordingly).

Answer 2

1. Make sure your Beanshell PostProcessor is located below the Regular Expression Extractor as JMeter runs Post-Processors upside down

2. Your test has mistake, you need to replace this line:

   log.info("link:", url);
   

   with this line:

   log.info("link:" + url);
   

   in order to see the output in the jmeter.log file

3. Since JMeter 3.1 it is recommended to use JSR223 test elements and Groovy language for scripting instead of Beanshell. See Apache Groovy - Why and How You Should Use It guide for more detailed explanation on why Groovy is better. You won't even have to change a single line of code (apart from the one, mentioned in point 2)
4. In general you don't need to copy returnLink_1 variable into BookingCode variable, you can access its value as ${returnLink_1} directly where required.