I have a setup thread group which sets the property value and in Thread group i am using the variable in csv data set configure
it is working if i am giving values like
${__setProperty(${name},_id.csv)} but if i take _id.csv from an array it is not reading the value.
Don't inline JMeter Functions or Variables into Groovy scripts as:
It may resolve into something causing script compilation failure
It may conflict with Groovy GString templates
It conflicts with compilation caching feature
As per JSR223 Sampler documentation:
JMeter processes function and variable references before passing the script field to the interpreter, so the references will only be resolved once. Variable and function references in script files will be passed verbatim to the interpreter, which is likely to cause a syntax error. In order to use runtime variables, please use the appropriate props methods, e.g.
props.get("START.HMS");
props.put("PROP1","1234");
So you need to amend your code as follows:
def name = 'file'
def files = ['_id.csv']
props.put(name, files[0])
Check out Apache Groovy - Why and How You Should Use It article for more information on Groovy scripting in JMeter.
Related
Update - TL'DR:
When it comes to the compilable and cacheable JSR223 Elements, I've saw people using all sorts of tactics dancing around it. I had my doubts and I had my answers here, and found that most of tactics I saw are done wrong:
If your JSR223 scripts are full of args[0], args[1], args[2] everywhere, then that's the wrong choice of tactic, even it is the best practice of JMeter, it is not the best practice in the software engineering and easy-maintenance point of view.
Even if you assign args[n] to some meaningful-named variables, it is not the best practice in JMeter either, as there are much simpler and straightforward ways.
Similarly, if you are following the advices of "using vars.get("") to get variables" (then assign them to some meaningful-named variables), it is not the best practice in JMeter either, as there are much simpler and straightforward ways.
The advice of "Don't use ${} in JSR223 scripts" is more a myth than the truth, as all the ${} using examples in this question are just fine.
Also, the advices of breaking up expressions like "ValidAssetIds_${i+1}_g" with "+" into "ValidCatalogAssetIds_"+ (i+1) + "_g" is just another myth, and in most cases untruth, as illustrated in this question.
Now, as per JMeter's best practices for JSR223:
The reason JSR223 Elements is recommended for intensive load testing over Beanshell or Javascript, is because it implements the Compilable interface, as Groovy scripting engine implements Compilable.
And, it tells people to
ensure
to check (enable) the Cache compiled script if available property to ensure the script compilation is cached
the script does not use any variable using ${varName} as caching would take only first value of ${varName}. Instead use:
vars.get("varName"),
like:
Else, the other option is to pass them as Parameters to the script, like this:
Now, my question are,
What would happen if I use
def my_var = vars.get("MY_VARIABLE")
log.info("The value of my_var is ${my_var}")
in above example? Would log changes in each iteration when MY_VARIABLE changes?
Instead of above, I also tried to use
def my_var2 = __V(MY_VARIABLE)
def my_var3 = ${__V(MY_VARIABLE)}
but somehow I wasn't able to get the values of MY_VARIABLE. What I'm missing?
what if my ${varName} is dynamically defined, what would happen if I use ${varName} in such form? Like,
case 1:
for(def i = 0; i < validAssets.size(); i++) {
vars.put("ValidAssetIds_${i+1}_v","${i+1}")
}
case 2:
def varName = ${__time(/1000,)}
vars.put("MY_Log","abc${varName}")
Would each iteration have their own MY_Log values, or they all will be the same? I know I can guess my conclusion from observations, but the purpose of this question is to let me (or people) know the precautions when it comes to using JSR223 that we might not be aware of before. thanks.
All the "precautions" are described in the documentation
When using this feature, ensure your script code does not use JMeter variables or JMeter function calls directly in script code as caching would only cache first replacement. Instead use script parameters.
For example if you define a random string via User Parameters:
and try to refer it as ${randomString} in Groovy - it will be "random" only during the first iteration, on subsequent iterations the "first" value will be used:
Questions 1 and 3 are using Groovy's string interpolation feature, it's safe to use unless there is a clash with other JMeter Variables names
Question 2: you need to surround the __V() function with quotation marks otherwise the variable value is resolved but it's not defined in Groovy causing compilation error, you should see a message in jmeter.log file regarding it
def my_var2 = "${__V(MY_VARIABLE,)}"
Check out Apache Groovy: What Is Groovy Used For? article for more information on Groovy scripting in JMeter context.
I have defined in my bamboo plan a variable (BAMBOO_TEST_VAR) that I'd like to reuse in a particular script but I can't seem to figure out how to make it visible to that script.
If I just reference that variable from the script it merely prints the variable as empty.
27-Oct-2020 23:34:00 TEST JOB
27-Oct-2020 23:34:00 bamboo.shortJobName =
27-Oct-2020 23:34:00 BAMBOO_TEST_VAR=
And if I provide it as input to the Environment variables field it just renders with the value I give in that field taken as a literal, not to the plan variable I was hoping it would evaluate to.
27-Oct-2020 23:36:57 TEST JOB
27-Oct-2020 23:36:57 bamboo.shortJobName =
27-Oct-2020 23:36:57 BAMBOO_TEST_VAR=$BAMBOO_TEST_VAR
How can I reference the plan's environment variable directly from a script task without passing it down through arguments or something of the sort. What aspect or bamboo detail am I ignorant of that would have informed me that what I'm attempting is not possible or not supported because of reason XYZ?
So the trouble was I didn't scope the variable appropriately. What did it in the end was
${bamboo.BAMBOO_TEST_VAR}
Turns out if I slowed down and looked at the bamboo page more carefully I would have noted the help breadcrumbs they left around. Copying that help text here, emphasis mine:
Variables substitute values in your task configuration and inline scripts. If a variable name contains any reference to a password, like "password", "sshKey", "secret", or "passphrase", its value will be masked with "********".
For tasks configuration fields, use the syntax ${bamboo.myvariablename}.
I have environmental variable called ENV, which holds the DEV,QA OR PROD region as value. When the server.xml loaded it includes the corresponding db configuration using this variable. For ex: db-config-${env.GAH_ENV}.xml
I would like to pass the same value to the batch job xml as a job parameter or properties to any of the class. How Can I do that.
below code snippet not working
<property name="environment" value="${env.GAH_ENV}"/>
The short answer is that using a batch property may not be a good solution and you might consider something else like MicroProfile's #ConfigProperty.
The reason is there's not a built-in way to access environmental variables through JSL substitution. There is also not a convenient way for one artifact to set a property value to be used by a second artifact running later within the job execution.
In the special case that you are starting the job from within the same JVM it will execute, of course, you could pass the env var value as a job parameter.
But in the general case, if you can change the Java code and you don't really need a batch property I would use a MicroProfile Config property instead, injected via #Inject #ConfigProperty.
By doing so you lose the batch-specific substitution precedence, including the override available via job parameters passed with the submit/start. You also give up the ability to use this property in other JSL substitutions (to "compose" its value into other batch properties via other substitutions).
But you at least get a property with its own various levels of precedence/override (e.g. server config, env var, microprofile-config.properties), which is more flexible than just always reading the env var via System.getenv( ).
This is certainly an area to consider for the next version of the (now-Jakarta) Batch spec.
I have an Config Element in JMeter, Especially User Defined Variables.
I have the variable "user" with the value "Justin", How can I use this variable in the groovy code (of an JSR223 Assertion)?
There are several of getting it:
Given you pass the variable to the JSR223 Assertion script via "Parameters" section you can access it as Parameters which contains the full string passed in the "Parameters" section
Given you pass the variable to the JSR223 Assertion script via "Parameters" section you can access it as args[0] (if you pass more than one variable separated by spaces you will be able to refer 2nd variable as args[1], 3rd as args[2], etc.
You can access it as vars.get('user') where vars stands for JMeterVariables class instance
You can access it as vars['user'] - basically the same as point 3 but uses some Groovy Syntax Sugar
You can access it as ctx.getVariables().get('user') - where ctx stands for JMeterContextService class instance just in case (in some test elements vars shorthand is not available)
Demo:
Any JSR223 element including Assertion have few variables it can use out of the box.
One of the variable is vars which is basically a map of JMeter stored variables.
User Defined Variables row is creating a JMeter variable, so you can get your value Justin in JSR223 using vars.get("user")
I have variable as string in this view:
["564546","56454654","3123123","868987"]
I need the script that deletes unnecessary symbols [ ] " and put it to another variable . (something like trim method)
I assume it should be made in BeanShell pre-processor.
It can be done via Beanshell PreProcessor as follows:
Add Beanshell PreProcessor as a child of the request which needs "another variable"
Put the following code into the PreProcessor's "Script" area:
String yourvar = vars.get("yourvar");
String anothervar = yourvar.replace("[","").replace("]","").replaceAll("\\\"","");
vars.put("anothervar",anothervar);
Change "yourvar" and "anothervar" according to your variables reference names.
yourvar - source variable name
anothervar - result variable name
vars is a shorthand to JMeterVariables class instance which provides access to JMeter variables in current context. See JavaDoc for the class for all available methods and How to use BeanShell: JMeter's favorite built-in component guide for advanced information on Beanshell scripting in JMeter.