Book Image

Performance Testing with JMeter 2.9

By : Bayo Erinle
Book Image

Performance Testing with JMeter 2.9

By: Bayo Erinle

Overview of this book

Performance testing with JMeter 2.9 is critical to the success of any software product launch and continued scalability. Irrespective of the size of the application's user base, it's vital to deliver the best user experience to consumers. Apache JMeter is an excellent testing tool that provides an insight into how applications might behave under load enabling organizations to focus on making adequate preparations. Performance Testing with JMeter 2.9 is a practical, hands-on guide that equips you with all the essential skills needed to effectively use JMeter to test web applications using a number of clear and practical step-by-step guides. It allows you take full advantage of the real power behind Apache JMeter, quickly taking you from novice to master. Performance Testing with JMeter 2.9 begins with the fundamentals of performance testing and gets you acquainted with JMeter. It will guide you through recording realistic and maintainable scripts. You will acquire new skills working with tools such as Vagrant, Puppet, and AWS, allowing you to leverage the cloud to aid in distributed testing. You will learn how to do some BeanShell scripting and take advantage of regular expressions, JMeter properties, and extension points to build comprehensive and robust test suites. Also, you will learn how to test RESTful web services, deal with XML, JSON, file downloads/uploads, and much more. Topics like resource monitoring, distributed testing, managing sessions, and extending JMeter are also covered. Performance Testing with JMeter 2.9 will teach you all you need to know to take full advantage of JMeter for testing web applications, dazzle your co-workers, and impress your boss! You will go from novice to pro in no time.
Table of Contents (14 chapters)

JMeter functions

JMeter functions are special values that can populate fields or any sampler or other element in the test plan. They take the following form:


Here, __functionName matches any of the many function names JMeter offers. Parentheses surround the parameters sent to the function, which can vary from function to function. Functions with no parameters don't need the parentheses; for example, ${__threadNum}. A list of all the available functions can be found on JMeter's website at Functions are divided into seven main categories. They are given here along with their examples:

  • Information: threadNummachineIP, time, and so on

  • Input : CSVRead, XPath, and so on

  • Calculation: counter, random, UUID, and so on

  • Scripting: javaScript, BeanShell, and so on

  • Properties: property, P, setProperty, and so on

  • Variables: split, eval, and so on

  • String: char, unescape, and so on

Functions can prove useful in certain...