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September 19, 2013

Beanshell scripting in Apache JMeter

This blog post explains about Beanshell scripting in Apache JMeter.

 
  • Introduction to Beanshell • BeanShell is a Java-like scripting language, invented by Patrick Niemeyer. • Pure Java • Free • Runs in the Java Runtime Environment and uses Java syntax • BeanShell is small and embeddable, so you can call BeanShell from your Java applications to execute Java code dynamically at run-time • standalone BeanShell scripts to manipulate Java applications; working with Java objects and APIs dynamically. • Runs in four modes: Command Line, Console, Applet, Remote Session Server. • With BeanShell you can create custom outputs, perform logical operations, manipulate variables, etc.
  • 3. Scripting Features • Optionally typed variables. • Scripted methods with optionally typed arguments and return values • Scripted objects (method closures) • Scripted interfaces and event handlers. • Convenience syntax for working with JavaBean properties, hashtables, and primitive wrapper types. • Auto-allocation of variables to emulate Java properties files. • Extensible set of utility and shell-like commands • Dynamic classpath management including find grained class reloading • Dynamic command loading and user command path • Sophisticated namespace and callstack management • Detailed error reporting
  • 4. Bean Shell Sampler • In order to manipulate and work on the response data, Bean Shell sampler would be a great element. • To add Bean Shell sampler, right click, Add > Sampler > Bean Shell Sampler.
  • 5. Bean Shell Sampler • In this example, user name will be retrieved and manipulated using Bean Shell sampler. • If the username is not equal to NAVEENKUMAR NAMACHIVAYAM, then the thread will stop. • Use Regular Expression Extractor to extract the username as shown below.
  • 6. Bean Shell Sampler • Once the username is extracted, add Bean Shell Sampler to manipulate. • Here the username will be stored in username variable. • To get the extracted value in Bean Shell sampler, use below syntax. • String userName = vars.get(“username”); • Next step is to check the condition using if statement. • if (userName != “NAVEENKUMAR NAMACHIVAYAM”) • You can use Data set config file variable too, if you do not want to hard code the user name. • Now, if the condition is true, following statement will be used to terminate the execution. • SampleResult.setStopThread(true); • Below statement will be used to return the value. • return userName
  • 7. Bean Shell Sampler
  • 8. Bean Shell Sampler Output
  • 9. Bean Shell Sampler – Some more enhancement • To print the output to command prompt, you can use • System.out.println statement • System.out.println(“Response Code is ” + ResponseCode); • System.out.println(“Response Message is ” + ResponseMessage); • if (SampleResult.isSuccessful()) • { • System.out.println(“Success”); • SampleResult.setStopTest(true); • SampleResult.setStopThread(true); • }

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About NaveenKumar Namachivayam

Hi there! is a passionate and experienced Performance Test Analyst based in Chicago, USA with skill sets in Manual Testing, Test Automation, Performance Testing, and Test Estimation. He loves to learn and experiment new trends and models in Software Testing. Please stop by at his personal blogs: Excel Blog, DealsBrook, NaveenKumarN.in, and Affiliate Insights blog and Software Testing Memes.

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