I need extract some string from Sampler Result, for example Latency:. How can i do that? Using regex function?
I don't think you will be able to extract the Latency using Regular Expression Extractor, if you need this metric as a JMeter Variable I would rather suggest going for JSR223 PostProcessor and the following code:
def latency = prev.getLatency()
vars.put('status', latency as String)
where:
prev is a shorthand for SampleResult class instance
vars is a shorthand for JMeterVariables class instance
See Javadoc for the aforementioned classes to see the available properties and functions and Top 8 JMeter Java Classes You Should Be Using with Groovy article to learn more about JMeter API shortcuts available for the JSR223 Test Elements
Demo:
the value can be referred as ${status} where required
Related
I'm trying to define fragment inputs, which are variables that should be defined to have the fragment execute successfully (I'm trying to achieve something similar to method arguments in programming languages)
I have tried to use test plan variables in the fragment like so :
But when the fragment is included in another test plan and with looking to the Debug PostProcessor output, those variables are completely ignored.
Please is there official JMeter documentation that mention test plan variables are ignored in this case ?
What is the cleanest way to define variables for a fragment with a scope local to the fragment or at least local to current thread ? My purpose to make a fragment clearly defined what are the variable it uses, so it can be easily reused by other developers
Thank you
If you need to declare the variables to be used in the test fragment - go for User Defined Variables configuration element like:
When you call a Test Fragment from a separate Test Plan the variables defined in that Test Plan will be available for usage.
Alternative option is using JMeter Properties which are global for the whole JVM
I'm trying to use Beanshell Assertion inside a Critical Section Controller, but it seems to be ignored. Does someone know why is this behaviour? have I missed something?
JMeter Assertions are executed only in context of the Sampler, if there is no sampler which generates a SampleResult in the Assertion's scope - it will not be executed.
Also be aware that since JMeter 3.1 you should be using JSR223 Test Elements and Groovy language for scripting so consider migrating to JSR223 Assertion on next available opportunity
assertions apply to all samplers which are in their scope
Assertion, for instance, is hierarchical in the test tree. If its parent is a request, then it is applied to that request. If its parent is a Controller, then it affects all requests that are descendants of that Controller.
Context
I am developing a custom JMeter plugin which generates test data dynamically from a tree like structure.
The editor for the tree generates GUI input fields as needed, and therefore I have no set of defined configuration properties which are set in the respective TestElement. Instead, I serialize the tree as a whole in the GUI class, set the result as one property and deserialize it in the config element where it is processed further during test execution.
Problem
This works just fine, except that JMeter variable/function expressions like ${foo} or ${_bar(..)} in the dynamic input fields are not evaluated. As far as I understand the JMeter source code, the evaluation is triggered somehow if the respective property setters in org.apache.jmeter.testelement.TestElement are used which is not possible for my plugin.
Unfortunately, I was not able to find a proper implementation which can be used in my config element to evaluate such expressions explicitly after deserialization.
Question
I need a pointer to JMeter source code or documentation for evaluating variable/function expressions explicitly.
After I manages to setup the JMeter-Project properly in my IDE, I found org.apache.jmeter.engine.util.CompoundVariable which can be used like this:
CompoundVariable compoundVariable = new CompoundVariable();
compoundVariable.setParameters("${foo}");
// returns the value of the expression in the current context
compoundVariable.execute();
If give String ResponseCode = prev.getResponseCode(); in beanshell assertion it's working good.
But if use String ResponseCode = getResponseCode(); I am getting error, so what is the reason for this?
JMeter is a Java application , which is an Object Oriented language.
In the element you use, JMeter exposes few scripting objects described here:
http://jmeter.apache.org/usermanual/component_reference.html#BeanShell_Assertion
One of them is SampleResult exposed under name « prev ».
This object is an instance of class :
http://jmeter.apache.org/api/org/apache/jmeter/samplers/SampleResult.html
By the way you should move to JSR223 Assertion using groovy.
prev is a shorthand for previuos SampleResult, see the JavaDoc for all available methods and fields.
Depending on parent sampler type it might resolve into different classes, i.e. HTTPSamplerResult which may provide more useful methods.
Also if you look at the bottom of the Beanshell Assertion test element you will see some other pre-defined variables which you may find useful:
As you can see there is already a ResponseCode variable which holds current sampler response code.
Check out How to Use JMeter Assertions in Three Easy Steps article for comprehensive information on different assertion types.
In JMeter I need to pass a value from one JSR223 sampler (groovy) to another one within the same Thread group. For now I use a User Parameter (vars.put(...), vars.get(...)) but it has a disadvantage that extra conversions to and from string are required to pass non-string data. Is there a way to pass an object (e.g. Integer or Date) between two groovy samplers in JMeter?
As per How to use BeanShell: JMeter's favorite built-in component guide:
vars
vars is the most frequently used component which represents JMeter Variables. It’s an instance of org.apache.jmeter.threads.JMeterVariables class and provides read/write access to current variables, capable of enumerating/changing existing, creating new ones and obtaining nested properties.
If you look into JMeterVariables class JavaDoc by following above link you'll be able to see putObject(String key, Object value) method which seems to be what you're looking for.
So in the first sampler:
Date now = new Date();
vars.putObject("now", now):
And in the second sampler:
Date then = vars.getObject("now");
Alternatively you can use props.put(String, Object) and props.get(String, Object) - in that case you will be able to access the values from different Thread Groups.