BeanShell Processor Tutorial 2: Advanced Usage

BeanShell is the most powerful component of Apache JMeter. You can execute any Java code by using BeanShell scripts. If you are new to BeanShell, please take a look basic usage of BeanShell Processor.

In this BeanShell tutorial, I want to deep dive into BeanShell and show you some other example of its usage. If you’re familiar with Java or any other language, it is very easy to get used to it.

Sample 1: Dealing With Dates

Dates are the most frightening component of any developer and testers also. In case you need deal with dynamic dates during your test, just follow these steps.

In this BeanShell example, we will create two dates for a reservation system.

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_YEAR, Integer.parseInt("5"));
Calendar calReturn = Calendar.getInstance();
calReturn.add(Calendar.DAY_OF_YEAR, Integer.parseInt("10"));

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");

vars.put("outFormatDate",df.format(cal.getTime()));
vars.put("returnFormatDate",df.format(calReturn.getTime()));

log.info("Departure Date "+vars.get("outFormatDate"));
log.info("Arrival Date "+vars.get("returnFormatDate"));

After running the code, you will have output:

2018-05-07 12:18:15,386 INFO o.a.j.u.BeanShellTestElement: Departure Date 2018-05-12
2018-05-07 12:18:15,387 INFO o.a.j.u.BeanShellTestElement: Arrival Date 2018-05-17

Our code added 5 and 7 days to today’s date in order to create two new Date objects. Then we assigned those variables by using vars.put() method to be able to use them in JMeter scripts.

Sample 2: File Writing

You might need some extra logging during your test. Basic FileOutputStream and PrintStream are enough to achieve this need.

FileOutputStream fout = new FileOutputStream(PATH+"/log.txt");
PrintStream out = new PrintStream(fout);
out.println("Departure Date "+vars.get("outFormatDate"));
out.println("Arrival Date "+vars.get("returnFormatDate"));
out.close();

This will create a log.txt file under the PATH you specified. PrintStream will write anything you want in that text file.

Sample 3: Dealing With Thread Groups or Responses

You can enable your BeanShell Processor to get information from your Thread.

log.info("THREAD Name "+ctx.getThread().getThreadName());
log.info("THREAD Name "+ctx.getThread().getStartTime());
log.info("Response Time is: " + prev.getTime().toString());
log.info("Connect Time is: " + prev.getConnectTime().toString());
log.info("URL is: " + prev.getURL());
log.info("The result is passed: " + prev.isSuccessful().toString());
log.info("Headers are: " + prev.getResponseHeaders());

CTX variable gives you the control over your current Thread. There are many functions that you can use.

PREV variable gives you control over your sampler’s response.

Then you have the response:

2018-05-07 13:02:00,387 INFO o.a.j.u.BeanShellTestElement: THREAD Name Thread Group 1-1
2018-05-07 13:02:00,387 INFO o.a.j.u.BeanShellTestElement: Thread Start Time is: 0
2018-05-07 13:02:00,387 INFO o.a.j.u.BeanShellTestElement: Thread End Time is: 0
2018-05-07 13:02:00,387 INFO o.a.j.u.BeanShellTestElement: Response Time is: 955
2018-05-07 13:02:00,388 INFO o.a.j.u.BeanShellTestElement: Connect Time is: 326
2018-05-07 13:02:00,388 INFO o.a.j.u.BeanShellTestElement: URL is: https://loadium.com/
2018-05-07 13:02:00,388 INFO o.a.j.u.BeanShellTestElement: The result is passed: true
2018-05-07 13:02:00,388 INFO o.a.j.u.BeanShellTestElement: Headers are: HTTP/1.1 200 OK
Date: Mon, 07 May 2018 10:02:00 GMT
Server: Apache/2.4.18 (Ubuntu)
Strict-Transport-Security: max-age=63072000
X-Frame-Options: DENY
X-Content-Type-Options: nosniff
Link: <https://loadium.com/wp-json/>; rel="https://api.w.org/"
Link: <https://loadium.com/>; rel=shortlink
Vary: Accept-Encoding
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

As you can see, the sky is the limit. Keep on load testing by using BeanShell Processors.

Happy load testing!