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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