I have a basic function in BeanShellSampler.bshrc at Jmeter 4.0
String getMyString(String strParam) {
return "MyString: "+strParam;
}
I called in BeanShell Sampler as below
String N = "123123";
log.info("${__BeanShell(getMyString("${__V(Var${N})}"),)}");
When I run Sampler output is somthing like that.
2018-06-18 15:25:40,080 INFO o.a.j.u.BeanShellTestElement: MyString: Var${N}
How can I set string variable to my function?
I read function articles in Jmeter web site
Thank you.
Add the next line to user.properties file:
beanshell.sampler.init=BeanShellSampler.bshrc
Amend your code to look like:
String N = "123123";
log.info(getMyString(N));
That's it, you should get MyString: 123123 in jmeter.log file
Be aware that starting from Jmeter 3.1 it is recommended to use Groovy for all forms of scripting as Groovy performance is much better comparing to Beanshell so consider taking the following steps instead:
Create a file, i.e. foo.groovy in "bin" folder of your JMeter installation and put your function there:
String getMyString(String strParam) {
return "MyString: " + strParam;
}
Add the next line to user.properties file:
You should be able to refer your custom code from __groovy() function like:
${__groovy(log.info(getMyString("123123")),)}
functions can be used anywhere in the Test Plan
For each BeanShell Program type there are different beanshell.*.init properties defined in bin/user.properties
beanshell.function.init=BeanShellFunction.bshrc
beanshell.preprocessor.init=BeanShellSampler.bshrc
beanshell.postprocessor.init=BeanShellSampler.bshrc
beanshell.assertion.init=BeanShellFunction.bshrc
Hence the same function which needs to be called from any program(preprocessor, postprocessor, etc) we need to copy the function to every .bshrc file OR use same .bshrc file for every program init property.
In your case if you are using local string variable N and passing it along with the script. If you use ${Variable} there must be a JMeter variable defined so that JMeter can pick its value. To do that you can use vars.put , write N value to JMeter variables and use ${N} .
I have defined Var123123 value as FinalValue as shown below
And 2 beanshell samplers one is to put String variable N to Jmeter variable and one is beanshell script as shown below
You can see in the log its printed VAR123123's value which is FinalValue
The reason why i took 2 beashell samplers is if i write N to JMeter variables and use it in same script its not updating N value until the sampler executed..
References :
Configuring JMeter
JMeter Beanshell
Please let me know if it helps
Related
JMeter OS Process Sampler is set up, works fine and saves result (a token as result of powershell srcipt execution) to a file.
Is it possible somehow to save result from powershell script directly into a JMeter variable instead?
What should I add for that?
Normally you should be using JMeter Post-Processors in order to extract data from Sampler's responses
If the token is the only thing that your powershell script returns you can extract it using i.e. Boundary Extractor, just provide desired variable name and leave everything else empty
Demo:
If there is some other text surrounding the token - adjust the boundaries accordingly or go for Regular Expression Extractor
I'm using a SOAP/XML-RPC Request to test a WSDL. Additionally I created a Counter element for this request. Each call of one of the functions has to contain other value in one of parameters.
Is there any possibility to save the maximum counter value to the file?
So when I start test, the value will be loaded from the file and increase by the counter.
At the end, this max value will be again saved to this file. And so on, so on...
Let's drop the built-in Counter and pass around the thread safe AtomicInteger.
Add a setUp Thread Group with a JSR223 Sampler (choose groovy as a scripting language) to your test plan. We will use it to read the value from the file. This thread group will be executed before all other thread groups and will provide us with the initial value.
Add the following code to the sampler:
import java.util.concurrent.atomic.AtomicInteger
counter = new File($/C:\Path\ToFile\fileName.txt/$).text
ai = new AtomicInteger(Integer.valueOf(counter))
props.put("sharedAtomicInteger", ai)
Then add another JSR223 Sampler after SOAP/XML-RPC Request in your regular Thread Group.
Add the following code to the sampler:
ai = props.get("sharedAtomicInteger")
variable = ai.incrementAndGet()
vars.put("variable", Integer.toString(variable))
Now the value of the improvised counter is stored in a variable and can be used in other requests issued by this thread.
Add a tearDown Thread Group with a JSR223 Sampler to your test plan. This thread group will be executed after all other thread groups and will write the maximum value to the file.
Add the following code to the sampler:
ai = props.get("sharedAtomicInteger")
new File($/C:\Path\ToFile\fileName.txt/$).write(ai.toString())
Finally, your test plan should look like this:
setUp Thread Group
JSR223 Sampler
Regular Thread Group
SOAP/XML-RPC Request
JSR223 Sampler
tearDown Thread Group
JSR223 Sampler
P.S.
Bear in mind that for brevity's sake I used the put() method of java.util.Properties class which is discouraged in the documentation.
To save value into a file (assumes a JSR223 Element and Groovy language)
new File("value.txt").text = vars.get("foo")
To read the value from file (assumes __FileToString() function)
${__FileToString(value.txt,,)}
I used tips from the first comment and do it in the following way:
transfer - Simple Controller
reading transactionId - JSR223 PreProcessor
transfer - SOAPXML-RPC Request
saving transactionId - JSR223 PostProcessor
JSR223 PreProcessor
Script language: groovy
import java.util.concurrent.atomic.AtomicInteger;
initial = new File("${absolute_path}transactionid.txt").text;
initial = initial.trim();
ai = new AtomicInteger(Integer.valueOf(initial));
transactionId = ai.incrementAndGet();
vars.put("transactionId", Integer.toString(transactionId));
SOAPXML-RPC Request
Here I'm using transactionId as one of the parameters in the SOAP Request.
JSR223 PostProcessor
Script language: groovy
transactionId = vars.get("transactionId");
new File("${absolute_path}transactionid.txt").write(transactionId.toString());
${absolute_path} is a variable defined in test plan as:
${__BeanShell(import org.apache.jmeter.services.FileServer; FileServer.getFileServer().getBaseDir();)}${__BeanShell(File.separator,)}
It is a path to folder with this JMeter project. This folder also contains file which is read to this test case.
Here is the simple code
vars.put("str" , "${__time(dd/mm/yyyy HH:MM:SS)}");
log.info("${str}");
I am expecting to see the value of str in logs but I am getting ${str}. I am validating it because I have to assign the current time to a variable and later want to use it in script. But I am not getting the value stored in str.
try as follows using vars.get:
vars.put("str" , "${__time(dd/mm/yyyy HH:MM:SS)}");
log.info("str " + vars.get("str"));
I wouldn't recommend inlining functions and/or variables into Beanshell script as you may face syntax error issues, i.e. type mismatch if the value has quotation marks.
So either use log.info(vars.get("str")); or use Debug Sampler and View Results Tree listener combination to see JMeter variables values.
More information: How to Debug your Apache JMeter Script
I want to use the name of the jmeter test script (.jmx) in a listener so as to generate the result file in a dynamic way. Can you please tell me what is the Jmeter variable for that purpose?
Used ${fileName} which didn't work
You can do it via Beanshell scripting like:
GUI mode
import org.apache.jmeter.gui.GuiPackage;
String scriptName = GuiPackage.getInstance().getTestPlanFile();
vars.put("scriptName", scriptName);
non-GUI mode
import org.apache.jmeter.services.FileServer;
String scriptName = FileServer.getFileServer().getScriptName();
vars.put("scriptName", scriptName);
Put the code snippet of your choice into any "Beanshell" test element (sampler, pre/post processor, or assertion), it will get .jmx test script name and store it into ${scriptName} variable.
To learn more about Beanshell scripting in JMeter check out How to use BeanShell: JMeter's favorite built-in component guide.
The variable that holds the test plan name is ${__TestPlanName}
Ref: http://jmeter.apache.org/usermanual/functions.html#__TestPlanName
Below would work irrespective of GUI / Non GUI mode:
import org.apache.jmeter.services.FileServer;
import java.io.File;
String testPlanFile = FileServer.getFileServer().getBaseDir() +
File.separator +
FileServer.getFileServer().getScriptName();
props.put("testPlanFile", testPlanFile);
Use this as ${__P(testPlanFile)} - Adding it as var would not work across all threads. From http://jmeter.apache.org/usermanual/functions.html -
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.
I'm very new at JMeter issues.
In a test script i have a BeanShell PreProcessor element that updates some variables previously defined at a "User Defined Variables" element.
Latter those variables are used in "Http Requests". However, the value that is used in the http request is the default one.
The scripts seems to be working due to some debug print();
My question is if it's necessary to delay the script to be sure that the BeanShell finishes?
Thanks a lot for your attention
There is no need to put any delay to Beanshell Pre-Processor as it's being executed before request. I'd recommend to check your jmeter.log file to see if there are any scripting issues as Beanshell Pre-Processor does not report errors anywhere including View Results Tree listener.
There are at least 2 ways to assure that everything is fine with your Beanshell script:
Put your debug print code after variables replace logic to see if it fires
Use JMeter __Beahshell function right in your HTTP request. If it's ok - View Results Tree will demonstrate beanshell-generated value. If not - the field will be blank and relevant error will be displayed in the log.
Example test case:
Given following Test Plan structure:
Thread Group with 1 user and 1 loop
HTTP GET Request to google.com with path of / and parameter q
If you provide as parameter "q" following beanshell function:
${__BeanShell(System.currentTimeMillis())}
and look into View Results Tree "Request" tab you should see something like:
GET http://www.google.com/?q=1385206045832
and if you change function to something incorrect like:
${__BeanShell(Something.incorrect())}
you'll see a blank request.
The correct way of changing existing variable (or creating new if variable doesn't exist) looks like
vars.put("variablename", "variablevalue");
*Important: * JMeter Variables are Java Strings, if you're trying to set something else (date, integer, whatever) to JMeter Variable you need to cast it to String somehow.
Example:
int i = 5;
vars.put("int_i", String.valueOf(i));
Hope this helps.
You can update the vale of a "user defined variable".
You have to create a bean shell sampler
vars.put("user_defined_variable", "newvalue");
#theINtoy got it right.
http://www.blazemeter.com/blog/queen-jmeters-built-componentshow-use-beanshell
I'm new to jmeter too but as I know variables defined in "User defined variables" are constants, so you can't change them. I recommend to use "User Parameters" in preprocessors or CSV Data Set Config.