Apache JMeter -How do I get variable value in __javaScript function

Question

How do I get variable value in __javaScript function ?

My code:

String[] zoollevelParams = Parameters.split(",");
Random random = new Random();
int zoomValue= Integer.parseInt(zoollevelParams[random.nextInt(10)]);
double lat = 50.669;
double lng = 5.499;
int numTiles = ${__javaScript(Math.pow(2\, "${zoomValue}"))};

This code is unbale to get value of zoomValue in __javaScript function call, how do I get value in this function?

Ori Marko · Accepted Answer · 2017-10-28 11:51:47Z

2

You can't combine Java and Javascript code and don't need to.

Just keep using Java and take parameter from JMeter variables object vars:

 int numTiles = Math.pow(2, vars.get( "zoomValue"));

Note: If you save zoomValue as Double or not a regular String use vars.getObject

answered Oct 28, 2017 at 11:51

Ori Marko

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2 Comments

Shruti Gupta Over a year ago

Thanks for answer, I tried your solution but I got an exception - org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval Sourced file: inline evaluation of: ``String[] zoollevelParams = Parameters.split(","); Random random = new Random(); . . . '' : Typed variable declaration : Error in method invocation: Static method pow( int, null ) not found in class'java.lang.Math'

Ori Marko Over a year ago

It means zoomValue has no value. If you want more help share you test plan how zoomValue is defined

Dmitri T · Accepted Answer · 2017-10-30 14:41:51Z

0

Don't inline JMeter Variables or Functions into scripts, particular in your case __javaScript function is being executed before zoomValue is getting initialized.

Make sure you use the relevant JSR223 Test Element
Make sure you select groovy from the "Language" dropdown
Make sure you have Cache compiled script if available box ticked
Amend the last line of your code to look like:
```
int numTiles = Math.pow(2, zoomValue)
```

Demo:

Check out Apache Groovy - Why and How You Should Use It article for more details on using Groovy for scripting in JMeter tests.

answered Oct 30, 2017 at 14:41

Dmitri T

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