I have a program I wrote that gets two parameters and set some files to be upload, and I want to know if I can run it from Jmeter before performing the HTTP upload requests.
You can use OS Process Sampler to invoke the .exe file of your C# program.
You can execute any program using JSR223 Sampler and Groovy language. If you don't want this execution to appear in the .jtl results file you can use i.e. JSR223 PreProcessor instead.
The relevant code will be as simple as:
"your_command".execute()
If you need the command output, you can amend it as:
"your_command".execute().text
The approach works on any operating system. See Groovy is the New Black article to learn what else could be done with Groovy.
Related
how to stop current iteration using jmeter and move to next iteration using beanshell script.
(Without using test action element)
I tried ctx.setRestartNextLoop(true) but this is not working.
JMeter version: 5.2.1
Since JMeter 3.1 it's recommended to use JSR223 Test Elements and Groovy language for any form of scripting
If for some reason (I fail to see any valid reason though) you still want to do this using JSR223 Sampler instead of Flow Control Action sampler - the relevant code would be:
SampleResult.setIgnore()
ctx.setTestLogicalAction(org.apache.jmeter.threads.JMeterContext.TestLogicalAction.START_NEXT_ITERATION_OF_CURRENT_LOOP)
More information on Groovy scripting in JMeter: Apache Groovy - Why and How You Should Use It
Is there any JMeter plugin available natively to send JMeter results to Splunk tcp forwarder? I looked up in jmeter-plugin's site but cannot find one. One other answer in SO suggested to use beanshell postprocessor to send the result. I am fairly new to Beanshell any help to get this done is much helpful.
Instead of sending data to Splunk from JMeter you could do the opposite thing - configure Splunk's input.conf to read JMeter's .jtl results file. See Monitor files and directories article for more details.
Second viable choice would be sticking to JMeter TCP Sampler, I believe it is easier than using any form of scripting
If you are looking for a ready solution you can consider SendToSplunk program which can be invoked via OS Process Sampler
I have an scenario to measure login function performance for that i have used JSR223 preprocessor to encrypt my password using Javascript its around 2000 Line of code it works fine it encrypts the password successfully, i can able to login using my script it works fine in small number of users.
If we go for an large volume of users script finish first 3 steps very fast once it reaches JSR223 preprocessor thread it takes long time to process it makes delay in performance test.
Any suggestion to fine tune this process ?
Already i have configured the cache size as 1024 even though it takes long time to execute.
For 600 Users it takes 1hr +++ time to finish the process with 1 Master and 3 slaves environment.
Javascript should be avoided for Load Testing.
The best option is to use:
Groovy
Check Cache Compilation Key
Enter a unique key per Test element
This will make JMeter compile the script leading to most optimal performances, read this for more informations:
http://www.ubik-ingenierie.com/blog/jmeter_performance_tuning_tips/
If you're looking to learn jmeter correctly, this book will help you.
JavaScript is not the best language to use with JSR223 PreProcessor, it's being run via Rhino or Nashorn engine and your expression is being evaluated all the time from scratch using not very performant way.
According to JMeter Best Practices it is recommended to use Groovy scripting engine. Assuming good configuration you will be able to get groovy scripts compiled into native JVM bytecode hence performance will be much higher than for JavaScript.
In order to get Groovy support in Jmeter you just need to
Download groovy-all.jar
Drop the file to "lib" folder of your JMeter installation
Restart JMeter
See Beanshell vs JSR223 vs Java JMeter Scripting: The Performance-Off You've Been Waiting For! guide for more detailed explanation and scripting best practices.
I want to run java code in jmeter using BSF shell but it shows an error:
"Response message: org.apache.bsf.BSFException: unable to load language: java".
Please provide url where I can download java language jar for jmeter.
Easy way: switch to Beanshell Test Elements, Beanshell is quite Java-compliant (apart from modern features like generics, switch statement on strings, etc.
Hard way: patch bsf-2.4.0.jar file (lives under /lib folder of your JMeter installation) to add JavaEngine class to it.
Right way:
From BSF Sampler Documentation:
The BSF API has been largely superseded by JSR-223, which is included in Java 6 onwards. Most scripting languages now include support for JSR-223; please use the JSR223 Sampler instead. The BSF Sampler should only be needed for supporting legacy languages/test scripts.
So consider using JSR223 Test Elements and Groovy language instead. In 99% of cases valid Groovy code will be valid Java code so it's unlikely that you'll have to change anything. See Beanshell vs JSR223 vs Java JMeter Scripting: The Performance-Off You've Been Waiting For! guide for details.
Is there a way to write scripts that simulate HTTP requests in JMeter. I know this can be done using the GUI, but is there a way to automate it using scripts?
The main method for writing JMeter scripts is using GUI.
Another option is to edit manually JMX file but (almost) nobody uses it as:
its format isn't documented (at least I haven't saw it)
JMeter GUI is really easy to use. See JMeter New GUI features to increase your productivity. It can't be said about JMX XML file
Non-GUI mode is for running JMeter scripts (it takes less resources than GUI mode)