I have the function defined in JSR223 sampler in Jmeter.
I would like to call it in the different sampler in the same thread.
This function is create a new time value.
Thanks,
Pdo
I can see 2 options:
Switch from JSR223 Sampler to Beanshell Sampler. In that case you will be able to use bsh.shared namespace to reuse variables, properties, and functions.
If your request can be narrowed down to creating a new time value there is __time() function capable of returning current date in different formats. If you need time in the future/past - you can combine it with __longSum function. For better information on aforementioned and other functions refer to How to Use JMeter Functions posts series
Related
I'm new to Jmeter and vigorously learning.
I wanted to know how JSR223 Sampler and JSR223 PreProcessor are different, can a sampler be used the same way as the preprocessor?
General difference is that PreProcessor won't be executed unless it has a sampler in its scope which it will be triggered (per sampler)
Pre-Processor element is defined to alter the settings of Samplers in their scope. It will always execute before the actual sampler request.
Specific difference is that JSR223 PreProcessor doesn't have SampleResult available, so for example you can't execute the following example:
SampleResult.setStopTest(true);
The SampleResult ResponseData is set from the return value of the script. If the script returns null, it can set the response directly, by using the method SampleResult.setResponseData(data), where data is either a String or a byte array. The data type defaults to "text", but can be set to binary by using the method SampleResult.setDataType(SampleResult.BINARY).
The SampleResult variable gives the script full access to all the fields and methods in the SampleResult. For example, the script has access to the methods setStopThread(boolean) and setStopTest(boolean).
JSR223 Sampler is a Sampler, so it will generate a SampleResult which will appear in the Test Results (unless you call SampleResult.setIgnore() method)
JSR223 PreProcessor cannot be executed per se, you need to connect it to one (or many) Samplers according to JMeter Scoping Rules so it will be executed before one (or many) samplers. PreProcessors execution time is not reflected in the test results (unless you use a Transaction Controller configured to include it)
Both can run an arbitrary code (it's recommended to stick to Groovy) so which one is to use mostly depends on your use case, if you need to conduct the load and measure the time - go for the Sampler, if you need to set up some data - go for the PreProcessor, etc.
I have csv file with 10,000 entries. for each iteration, i want to use few 100's of entries. i have loaded into a java list in JSR223 sampler under only once controller. so that, i can load once and use this master list to retrieve chunk of records every time in other JSR223 samplers. i am not able to access variables "totalrows", "lines" defined in one JSR223 sampler from another JSR223 sampler in different thread group. Any other way apart from using vars.get() to get global scope for variables defined to JSR223 sampler
import org.apache.commons.io.FileUtils;
List lines = FileUtils.readLines(new File("skuinfo.csv"));
int totalrows = lines.size();
Variables are thread related, to be able to share you need to use properties (props in jsr223 test elements).
But I would advise you not to use this method as it will impact performances of JMeter particularly if your code is not correctly developed.
You also need to handle synchronization as objects will be shared among threads.
So it’s better to use built-in mechanism of JMete, ie CSV DataSet and prepare data before test.
My test configuration :
Loop Controller
--> Beanshell Sampler
vars.put("test", "${__CSVRead(*test,0)}");
Add it to an existing array retrieved from vars.getObject
In the above scenario, I am constructing my request payload dynamically in a loop controller. I had to put the CSVRead function in a separate Beanshell sampler under the loop controller since "${__CSVRead(*test,0)}" was reading the sample line if I use it within a for loop inside the beanshell sampler (interpreted mode).
While the above configuration meets my requirement, my *.jtl files are growing in size even for a 30 minute load test since the BeanShell sampler is getting measured all the time. While I am able to filter the required data by using the FilterResults tool, I want to know how to avoid this during the execution itself like the TestActionSampler
Use one of the following Test Elements instead:
BeanShell PreProcessor
BeanShell PostProcessor
Beanshell Timer
By default Timers and Pre/Post Processors execution time is not included into parent sampler elapsed time (unless you use Transaction Controller explicitly configured to do so), using this approach you will be able to exclude the time, required for constructing payload from test results.
I resolved it by using the following configuration.
Loop Controller
--> Test Action Sampler
--> Beanshell timer returning 0 at the end
vars.put("test", "${__CSVRead(*test,0)}");
Add it to an existing array retrieved from vars.getObject
return 0;
Obviously, I know that I have response time in .jtl file and in listener called Aggregate report, but I'm looking for way to get reponse time of request to variable.
You can do it as follows:
Add Beanshell PostProcessor as a child of the request
Put the following code into PostProcessor's "Script" area:
vars.put("responseTime", String.valueOf(prev.getTime()));
It will get elapsed time for the sampler (in milliseconds) and store it into ${responseTime} variable. You can add sampler label as prefix or postfix to distinguish response times for different samplers.
prev is a shorthand for parent SampleResult instance.
See How to Use BeanShell: JMeter's Favorite Built-in Component for comprehensive information on Beanshell scripting in JMeter tests.
I have a test plan in jMeter that requires some parameters that needs to be calculated before running the test. In order to calculate these parameters, I created a JSR223 PreProcessor directly under test plan as seen below.
My problem is PreProcessor seems to run before every request which is not what I want. I need to calculate these parameters only once and use them in testing.
Is there a way to run the JSR223 PreProcessor only once, or should I use another method?
Thanks in advance.
Edit:
As #ubik-load-pack suggested, I tried "setUp Thread Group" as following but variables created in the code was not available under "Thread Group". They were also present neither in the logs (logging is used in the code) nor in the View Results Tree (via Debug PostProcessor)
I also tried "Once Only Controller" which also didn't work, same as above.
For more information here is content of my JSR223 PreProcessor. (Not the whole code, there will be more variables here so using date functions is not a solution for me by the way.)
By design a PreProcessor runs before any Sampler runs.
So if you want to run something only once per user, you can do the following:
Use a Once Only Controller and put in it a JSR223 Sampler that will contain your code.
If you want to do it once for all users, then use a setupThreadGroup
that will contain your JSR223 Sampler and configure it with 1 thread. It will run once before the regular Thread Groups are started.
EDIT after you updated your question:
As I wrote, you cannot use the setupThreadGroup approach if you want to reuse variables in Thread Groups so stick to OnceOnlyController approach for your request
With the Once Only Controller it is not working because you misread my answer, I am suggesting to use a JSR223 Sampler not PreProcessor as a preprocessor will run only if there is a sampler that runs.
If you use a Sampler, and you have multiple ThreadGroups, then you'll have to copy that sampler into each ThreadGroup, since you can't put Samplers outside of ThreadGroups.
you can use jsr223 PreProcessor with:
if(vars.get("init")=="OK") return;
vars.put("init","OK")
//your code
I'm doing a slightly dirty workaround at the top of the preprocessor:
log.info("in PreProcessor. Sampler name: " + sampler.getName())
if (sampler.getName() != "HTTP Request") {
log.info("not running again")
return
}
In my case I cannot add another sampler because it will mess up my timer calculations.