In a Simple Controller I put a JDBC PreProcessor and an If Controller for the purpose of the If Controller should use the PreProcessor's result. Because of the precedence of the elements, the controller interprets before the PreProcessor and can not evaluate the excepted value.
How can I force that the PreProcessor goes before the Controller?
In other words how can I run or skip a sample depending of dynamic precondition?
Thanks!
I found out the reason and the solution. The PreProcessors belong to Samplers. But (this was not described) they are evaluating only DIRECTLY BEFORE the Sampler. After the evaluation other Samplers and Controllers can use the results of the PreProcessors.
In my case I used first the PreProcessor, next the Conroller with a child Sampler. In this situation the PreProcessor was not evaluated at the proper time, because there was no Sampler before the Controller:
1. PreProcessor
2. Controller (can't use the PreProcessor's result)
2.1. Sampler
Solution
If any Sampler precedes the Controller, the PreProcessor will be evaluated before the Controller. One Sampler (e.g. Test Action, Debug Sampler, or any "Do-nothing" Sampler) must be between the PreProcessor and the Controller. In this case the running order is what expected:
1. PreProcessor
2. Sampler (can use the PreProcessor's result)
3. Controller (can use the PreProcessor's result)
Related
Please tell me why the code in comments (both /*something*/ and //something) is executed using JSR223 Sampler & BeanShell sampler?
For example, I have:
and in the next JSR223 Sampler I have:
and the result is:
and the question is: why this code: "/${__setProperty(checkProperty, 50)};/" is executed regardless of that it is in comment and it is in wrong condition?
JMeter Functions are being executed in the place where they're found, no matter where it is, in Sampler label, comments section, sampler body, etc.
Actually inlining JMeter Functions and/or Variables into JSR223 scripts is not the best idea as
it might conflict with Groovy's string interpolation syntax
the function or variable might resolve into something causing script compilation failure or logic error
and last but not the least Groovy will cache the first occurrence and use it for subsequent iterations
So if you need to set a property - use props.put() function like
props.put('foo', 'bar')
And finally I'm not sure that using props.clear() is a good idea because there are some pre-defined JMeter properties (you can check yourself using Debug Sampler and View Results Tree listener combination) and it might result into unexpected behaviour if a test element will be relying on that property existence and/or value
I'm trying to iterate through a User Defined Array using a ForEach Controller. I'm looping through the array and for each node, creating a new variable with the iteration count appended to the name. However, the ForEach Controller doesn't ever fire.
I can see that the values are created by logging them, but the ForEach Controller doesn't ever make it's HttpRequests. Please note that this is a prototype, our actual use case will have 1000-5000 nodes in the array and will do more then just an HttpRequest. Thanks for your help.
The variables must exist prior a thread (virtual user) reaches the ForEach Controller
PreProcessors are executed before Samplers and are not executed without Samplers, so your PreProcessor gets executed only before "HTTP Request Not In ForEach"
So the options are in:
Replace ForEach Controller with the HTTP Request Not In ForEach so the latter one would appear earlier in the Test Plan
Convert JSR223 PostProcessor to JSR223 Sampler, Samplers are executed consecutively and upside down. If you don't want it to generate a result add SampleResult.setIgnore() line somewhere in your script. See The Groovy Templates Cheat Sheet for JMeter for more Groovy-related tips and tricks
PreProcessor is executed before samplers in its scope, so that's why you don't enter the ForEach Controller.
You can change it to JSR223 Sampler, or add Sampler before the For ForEach Controller
I am using Beanshell sampler with java code to compare the two files line by line. I want to fail the Beanshell sampler if comparison failed at any line. I see always my beanshell sampler is sucess in view results treee even the comparison failed or passed. So any one please give me a idea how to fail the sampler.
Note: I used Beanshell Assertion as well but its not worked.
View Results Tree Image
Beanshell Sampler with Beanshell Assertion
boolean differenceInFile = false;
SampleResult.setSuccessful(differenceInFile);
IsSuccess=differenceInFile;
line #2 and line #3 is what you need in your bean shell sampler to pass / fail depending on your file comparasion
Sample JMX File
It will show you as an xml, try to download it
There is SampleResult pre-defined variable which you can use for setting the sampler passed or failed, define response code, response message, response body, etc.
So something like:
if (there_are_differences) {
SampleResult.setSuccessful(false)
SampleResult.setResponseCode("500")
SampleResult.setResponseMessage("Files are different")
}
In the assertion you have AssertionResult for the same.
Also be aware that you should be using JSR223 Test Elements and Groovy language for scripting since JMeter 3.1 so it might be a good option for migration.
More information on JMeter API shorthands available for the JSR223 Test Elements - Top 8 JMeter Java Classes You Should Be Using with Groovy
The accepted answer in this thread is from 2014 and does not seem to work any more. I can't figure out why: JMeter. How to determine when thread group is finished
I have 2 threadgroups (ignore the setUp group)
Based on the accepted answer in the thread above I added
A BeanShell Preprocessor vars.put("DONE", "FALSE");
A BeanShell Postprocessor
int activeThreadCount = org.apache.jmeter.threads.JMeterContextService.getNumberOfThreads();
if (activeThreadCount <= 1)
{
vars.put("DONE", "TRUE");
}
A If Controller ${__BeanShell(vars.get("DONE") != null && vars.get("DONE")=="TRUE")};
... with a Flow Control Action terminating all threads via Stop now if triggered.
via print statements in the postprocessor I was able to verify that the variable "DONE" is correctly set and the condition vars.get("DONE") != null && vars.get("DONE")=="TRUE" is evaluated correctly (when used in the postprocessor).
However when I use the condition inside of the If Controller it does not seem to be evaluated correctly no code inside of child elements of the If Controller is executed. The "Thred Group: ETL" just keeps on going even if the condition should evaluate to true.
My assumption would be that this has to do with the "Interpret Condition as Vairable Expression"-checkbox or the interpreter behind the If Controller. But unfortunately I don't know enough about JMeter to figure this out.
No Semicolon at the end of an If Controller expression is allowed. After removing the semicolon the controller works as intended
First of all get familiarized with JMeter Scoping Rules as your Beanshell Pre and Post processors are executed before/after each Sampler and it doesn't seem to me that this is something you really want to achieve
Second, since JMeter 3.1 you should be using JSR223 Test Elements and Groovy language for scripting
If Controller accepts something which resolves to true or false, in your case it's true; so If Controller's children will never be executed
It is possible to stop all the threads directly from the PostProcessor itself as simple as prev.setStopTest(true)
I am trying to built a test plan in jmeter where i want to run test for specific HTTP request based on their names. I used if controller but I dont know what condition to write.
I am writing ${__samplerName()}=="HTTPRequestName" in the condition but it isn't executing.
kindly help me as soon as possible.
You need to surround ${__samplerName()} with quotation marks as follows:
"${__samplerName()}"=="HTTPRequestName"
See How to use JMeter's 'IF' Controller and get Pie. guide for more details on If Controller use cases and clauses.
In case if you need to run samplers basing on some condition, you can use JMeter Properties as follows:
Launch JMeter providing sampler name property like jmeter -Jrunsomesampler=true
Add If Controller with the following condition: ${__P(runsomesampler,)} == true
Add desired HTTP Requests as a children of the IF Controller