Variables Definition

You can define an initial set of variables within:

• a test plan
• a User Defined Variables (UDV) element. It's a configuration element.

User variables per Thread

Some test plans need to use different values for different users/threads.

For example, you might want to test a sequence that requires a unique login for each user.

• Create a text file containing the user names and passwords, separated by commas.
• Add a CSV DataSet configuration element to the test plan under a thread group
• Give a name to the USER and PASSWORD variables in the variable name field.
• Set the sharing mode to “All Threads”. The CSV Data Set element will read a new line for each thread.
• Replace the login name and password on the appropriate samplers with the appropriate name variables.

Command Line

You can change the values of variable on the command-line only by using a property.

Passing variable between thread

To pass variable between thread when the value is not known until the test starts, you may use:

• A property: Properties are shared between all JMeter threads, so if one thread sets a property , another thread can read the updated value.
• A File: Write variables to a file and re-read them. For example you could use the Save Responses to a file listener or perhaps a BeanShell PostProcessor in one thread, and read the file using the HTTP Sampler “file:” protocol, and extract the information using a PostProcessor or BeanShell element.
• the bsh.shared namespace
• (and write) your own Java classes