I am setting my Jmeter variable using this using beanshell assertion:
${__setProperty(id_${__threadNum},${id},)}
And using this in another request like this:
${__P(id_${__threadNum},)}
and running the requests like this
However I want to run the loop count instead of the thread. So that i can run the request one by one. How can i change it to so it is loopNum instead of the thread
Can i use this below when i want to use the loop instead of the thread??
I am setting my Jmeter variable using this:
${__setProperty(id_${__iterationNum},${id},)}
And using this in another request like this:
${__P(id_${__iterationNum},)}
For getting the current iteration (1st loop - 1, 2nd loop - 2, etc.):
props.put("id_" + vars.getIteration(), vars.get("id"));
For getting all iterations (each time it will return 10)
props.put("id_" + ctx.getThreadGroup().getSamplerController().getProperty("LoopController.loops"), vars.get("id"));
Few more hints:
Don't inline JMeter Functions or Variables into Scripts, either use "Parameters" section or go for code-based equivalents instead, like in my above examples props stand for JMeter Properties, vars - for JMeter Variables, etc.), see Top 8 JMeter Java Classes You Should Be Using with Groovy article for more details.
Don't use Beanshell for scripting, since JMeter 3.1 you are supposed to use JSR223 Test Elements and Groovy language
Related
I am struggling a bit to make use of a variable created using the Json extractor, I have extracted all the ID's from a response and want to cycle through them individually across the threads.
Thread 1 would use id_1 and thread 2 would use id_2 etc.
I have tried using a ForEach controller but it's cycling through the whole set for each thread.
Test runs like this:
Generate access token
Get parameters - Extract the list of ID's here.
Update parameter - Pass the ID individually here per thread.
Is there a way to achieve this?
You won't be able to do this because as per documentation:
Properties are not the same as variables. Variables are local to a thread; properties are common to all threads, and need to be referenced using the __P or __property function.
So if you want to perform extraction using one thread and then hit everything using multiple threads you can either convert all the variables which start with id_ to JMeter Properties using the following Groovy code snippet:
vars.entrySet().each { variable ->
if (variable.getKey().startsWith('id_')) {
props.put(variable.getKey(), variable.getValue())
}
}
and then you will be able to access the properties using __P() function like:
${__P(id_${__threadNum},)}
When I use the command ${__jm__myLoopControllerName__idx} in JSR223 Sampler, it always returns 0 as the index.
The sampler is in the Loop Controller. But I can see that the CSV file I'm looping is done for each line because in the listener "View Result Tree" I can see in the Request Headers, that the data is from each line. What am I doing wrong ?
Thanks for your help.
M.
Use vars to get variable in JSR223 script:
String index = vars.get("__jm__myLoopControllerName__idx");
variable inside ${} syntax is getting cached
ensure the script does not use any variable using ${varName} as caching would take only first value of ${varName}. Instead use : vars.get("varName")
As per JSR223 Sampler documentation:
The JSR223 test elements have a feature (compilation) that can significantly increase performance. To benefit from this feature:
Use Script files instead of inlining them. This will make JMeter compile them if this feature is available on ScriptEngine and cache them.
Or Use Script Text and check Cache compiled script if available property.>
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.
So either put your ${__jm__myLoopControllerName__idx} to "Parameters" section and refer it as "Parameters" in your script:
or use vars shorthand for JMeterVariables class instance like:
vars.get('__jm__myLoopControllerName__idx')
I have an http request that uses an extractor to set a JMeter variable (lets call it test) from the body. When I look at the debug controller I can see this works fine. Next I want to append something to the beginning of the variable so I add a user defined variable node and add a variable with the name new and I set the value to ${test}. However when I look in the debug response I see ${test} instead of the value.
I tried the same thing setting the value manually in 2 different UDV nodes and it works fine, so how do I append to a JMeter variable declared in an extractor?
As per JMeter Documentation:
The User Defined Variables element lets you define an initial set of variables, just as in the Test Plan.
Note that all the UDV elements in a test plan - no matter where they are - are processed at the start.
So the User Defined Variables element will be read only once and only when the Test Plan is started.
If you need to overwrite the current variable with a new value you can go for i.e. __groovy() function, the relevant syntax would be something like:
${__groovy(vars.put('foo'\, 'some_prefix_' + vars.get('foo')),)}
Demo:
vars is a shorthand for JMeterVariables class instance, it provides read-write access to all JMeter Variables in the current thread scope. Check out The Groovy Templates Cheat Sheet for JMeter to learn what else you can do with Groovy scripting in JMeter tests
UDVs can't be used in dynamic way because they are process once at the start of the test.
Don't use UDV, use JSR223 Sampler (or PostProcessor) with vars;
vars.put("new", "prefix"+ vars.get("test"))
Another option is to use Set Variables Action plugin
I want print my json response in jmeter. I used beanshell but it shows error. Below is the line to print json object extracted in "data":
log.info("========"+${data});
Don't ever inline JMeter Functions or Variables into scripts, they may resolve into something which will cause compilation/interpretation failure, use code-based equivalents instead or pass functions/variables via "Parameters" section.
Exhibit A: using vars shorthand
log.info("========" + vars.get("data"));
Exhibit B: using "Parameters" section
Using Beanshell isn't the best scripting option, consider migrating to JSR223 Elements and Groovy language as Beanshell has known performance problems. Moreover, Groovy has built-in JSON support See Apache Groovy - Why and How You Should Use It for details.
And finally your ${data} variable might not be defined (i.e. your extractor fails), in this case you will get interpretation failure on attempt to refer it as ${data}, double check its value using Debug Sampler and View Results Tree listener combination.
I wrote a Script in Test Case inside BeanShell PreProcessor and I want to use the value(Integer) in ThreadGroup.
By using vars.put() we can only share String type of values.
NOTE: I want to use the value in Number of Threads(users) block
There are at least 3 ways of doing this:
Use vars.putObject() - places an arbitrary Object into JMeterVariables
Cast Integer to String vars.put("foo", String.valueOf(bar));
Use bsh.shared namespace like:
bsh.shared.myInt = 15
See How to Use BeanShell: JMeter's Favorite Built-in Component guide for more information on Beanshell scripting in JMeter tests
NOTE! you won't be able to amend number of threads in the current Thead Group using Beanshell test elements.