如何在jmeter中使用groovy从testplan和csv文件中获取定义的变量值

Question

I am trying to pass a variable in groovy in JSR223 sampler. The variable is defined in test plan. Basically there are ${user_id} and ${__time(,curTime)} defined for value of Message in Test Plan ${user_id} is the value i am getting from csv file and ${__time(,curTime)} is function for current time in millisecond. Basically i want a value in output as user_id corresponding with timestamp in millisecond.

For Eg if value of ${user_id} is abcd and value of ${__time(,curTime)} is 1478965236574 then, i am expecting value as abcd1478965236574 in the variable data in JSR223 sampler. Can i get this value?

Answer 1

1. If you want to concatenate 2 variables: user_id and curTime

    def value = vars.get("user_id") + vars.get("curTime"); 

2. If you want to generate the new timestamp"

    def value = vars.get("user_id") + System.currentTimeMillis() 

vars is a shorthand to JMeterVariables class instance which provides read/write access to JMeter Variables in scope.

Remember that you should not inline JMeter Variables and Functions like ${Message} into the script body, use vars.get("Message") instead as inlining variables causes compilation caching failure hence you loose the major Groovy benefit. See Beanshell vs JSR223 vs Java JMeter Scripting: The Performance-Off You've Been Waiting For! for more detailed explanation and scripting best practices.