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)

Managing sessions with cookies

A majority of web applications rely on cookies to maintain the session state. In the very early stages of the Internet, cookies were only used to keep the session ID. Things have since evolved and cookies now store a lot more information, such as user IDs and location preferences. The banking application we used as a case study in Chapter 2, Recording Your First Test, for example, relies on cookies to help each user maintain a valid session with the server, enabling the user to make a series of requests to the server. An example will help clear things up, so let's get right to one. For our example, some resources are protected based on the role of the user that is logged in. Users can have an admin or user role.

The steps to manage sessions with cookies are as follows:

  1. Launch JMeter.

  2. Start the HTTP proxy server (see Chapter 2, Recording Your First Test, if you don't know how).

  3. In the browser, go to

  4. Click on the User Protected Resource...