How to use response field in a new request in Jmeter - jmeter

I have this issue that I want to solve.
I want to create a new http request using field from previous response
I send a request
I used Json extractor to move the response string to a variable (let call this string nurl)
I used Regular expression and move the field that I want to "Reference Name"
(meanning from nurl I just want tt_cid)
Now I want to make a new call, and use that field tt_cid in my new call
How I shall call tt_cid? since it is not passed as User Defined Variables,
when I use tt_cid, I do not think J meter know it, since it is not written there, I just pulled it from the response.
Provided a Pic of what I have done
Regards to you all

Short answer call it ${tt_cid}.
since it is not passed as User Defined Variables, when I use tt_cid,
I do not think J meter know it,
For your understanding add Debug Sampler after Regular expression,
You will see all your JMeter variables, including tt_cid, which can be called as other variables ${tt_cid} inside other Samplers.
It's called Reference Name and not Variable Name because it's more complicated, You should read JMeter's Regular Expression to understand how it works internally, But basically it saves more than just 1 Variable.

Related

Jmeter check using if controller, for a variable has a value or not

in one of my steps in the Jmeter script, I'm using json extractor to read a value from a key(address) in the JSON response and store it in a variable called "TypeOfRequest." In the next step, I need to check if the "TypeOfRequest" value is null or not(There can be situations I don't find that key in the JSON response). Then I need to take a different route.
Snippet how I'm getting the TypeOfRequest from Json extractor $.communicationMethods[:1].hTTPS.address
So my question is, how do I check if TypeOfRequest has a value or not in the if controller?
tried using '${__javaScript(vars.get("TypeOfRequest") == null)}(ref https://www.blazemeter.com/blog/jmeter-if-controller and https://sqa.stackexchange.com/questions/32969/how-do-i-check-if-a-variable-is-null-using-a-if-controller) but unable to go through the if condition, can someone help me with this. Thanks in advance
Just use Debug Sampler to see what JMeter Variables are defined and inspect their values, my expectation is that you're "unable to go through the if condition" because your TypeOfRequest variable is not null, i.e. it's present but it's an empty string.
Also the referenced article suggests using __groovy() or __jexl3() function so I believe if you change your condition to something like:
${__groovy(org.apache.commons.lang.StringUtils.isEmpty(vars.get('TypeOfRequest')),)}
you will be able to "go through the if condition"

Is it possible to add an object refernce User Defined Variable in JMeter?

I can see that User Defined Variables can populate vars with string values only. Is there a way to populate an object reference User Defined Variable in User Defined Variables element.
I have tried as UDV values something like ${__groovy(new java.util.concurrent.ConcurrentHashMap())}. But this way leads to some string retrieved from the variable later.
I have even tried to use side effects of User Defined Variables groovy scripts like ${__groovy(vars.putObject("key", new java.util.concurrent.ConcurrentHashMap(); "assigned")}. But this one leads to some JMeter compilation error while being syntactically OK groovy script in my opinion.
I have tried using scripting pre-processors put on top of the test plan like one of SO answers suggested but they work before each sampler in the tree and thus do not what is intended do.
I still can't find a way to initialize an object reference variable in JMeter at the test plan initialization phase hijacking the thread initializing UDVs.
I know of possibilities to populate vars with putObject(<key>, <reference value>) from within scripting elements like JSR223/BeanShell/some others sampler/pre-processors etc.
But I want to populate the vars for all my thread groups at the initialization of the test plan in order to avoid using props imposing synchronized lock penalty on each put/get call. And there is no possibility to add a sampler at the top of the test plan.
EDIT after accepting correct answer by Dmitri T (for those who want to know the answer right away in more clear form):
${__groovy(vars.putObject("<key>"\, new HashMap()); "virtually anything")}
is correct (while indirect) way to populate an object reference variable in UDV test plan element.
while being syntactically OK groovy script in my opinion.
it's only your opinion, look at jmeter.log file and you will see interpretation error there
As per JMeter Documentation:
If a function parameter contains a comma, then be sure to escape this with "\", otherwise JMeter will treat it as a parameter delimiter. For example:
${__time(EEE\, d MMM yyyy)}
the correct syntax would be something like:
${__groovy(vars.putObject('key'\,new java.util.concurrent.ConcurrentHashMap()),)}
Demo:
More information: Apache JMeter Functions - An Introduction

Unable to send object value in next request json body

I am trying to send object value based on condition to the previous request.
From above,pricecheck i will get formtype value based on form type validation i have to send guests info in request..
here i am able to validate but not able to pass the object value if i try any string i can able to do,please help me.
You need to put a string value in vars, surrounded with quotes " and escape inner quotes\",as
vars.put("guests", "{ \"title\":\"Mr\", .... }");
You're violating 2 major best practices:
You're referring JMeter Variables like ${form} in the JSR223 Test Elements while you should be using vars.get('form') construction instead
You're using JavaScript language which is a performance anti-pattern, since JMeter 3.1 you should be using Groovy language for scripting
Check out Parsing and producing JSON article to learn more about reading and generating JSON in Groovy.
Also posting code in form of screenshots is not something you should be doing otherwise the chance of getting a comprehensive answer will be much less

Using Extracted JSON Value in Another JMeter Thread

First, let me preface this question that I've only been using JMeter for 36 hours.
I've been able to successfully create a thread that performs a POST (json body) to generate a new record.
{
"id":1257697771,
"displayName":"TERM2",
"functionName":"f_1257697771",
"displayableSourceExpression":"TRUE",
"typeId":200,
"groupId":300,
"clobObjId":1257697772,
"typeCode":5,
..........
}
I need to take the new record's ID (1257697771) value returned in order to perform updates, get by ID, delete, etc. on this record in other threads.
After much reading, I've created a Regular Expression Extractor where:
Apply to: Main Sample Only
Field to Check: Body as Document
Reference Name: newRecord
Regular Expression: "id":(.+?)\,"displayName"
Template: $1$
Match No: 1
Default Value: NONE
At this point, I'm not sure if my Regular Expression is formatted correctly where (.+?) is valid.
Also, I'm confused if I can either just specify the new reference (newRecord) in another thread's HTTP request's Parameters or use a BeanShell Post-Processor, or a Response Assertion, etc....
There a lot of answers for the same function of "Passing". Not being a programmer, I've tried to follow the discussion "how to extract json response data in jmeter using regular expression extractor?", but I'm still not clear.
Any insight is appreciated. Thanks.
JMeter Variables are local to Thread Group, you need to convert your variable to JMeter Property.
Use:
__setProperty() function in the Thread Group where you define your newRecord variable like:
${__setProperty(newRecord,${newRecord},)}
__P() function to access property value like:
${__P(newRecord,)}
See Knit One Pearl Two: How to Use Variables in Different Thread Groups article for more detailed explanation.
Also be aware of the Function Helper Dialog as it looks like JMeter functions syntax was developed by aliens.
To pass a value between threads you need to use the jmeter property function.
In a jsr223 postprocessor using groovy the code to get the value is as follows:
def userProperty = props.get('propertyToGet')
vars.put('userProperty', String.valueOf(userProperty))
You would then access the variable in your thread using:
${userProperty}
Or you can use shorthand directly:
${__P('propertyToGet')}
Variables in jmeter are thread specific.
Thanks everyone. I was able to resolve it with your help!
In the first thread:
set the Reg Expression Extractor Regular Expression = "id":(.+?)\,"displayName"
added a Bean Assertion where Parameters = ${__setProperty(newRecord,${newRecord},)}
In the second thread:
appended the Path url with ${__P(newRecord,)}
Executing the first thread (POST) resulted an new record with a unique ID. (1257698108)
Executing the 2nd thread (GET) shows
GET http://server/.../.../.../.../1257698108
And returns the exact data generated in the first thread.
Thanks everyone for your help!

How to pass the value of a jmeter response as the input to the next request

As am new to jmeter please help me in passing the value from a webservice response as the input to the next webservice request
I guess that your web service returns XML (more likely) or JSON.
All you need is to use XPath Extractor Post Processor, get interesting response part, store it to variable and use in next request.
You can address variables next ways:
${YOUR_VARIABLE_NAME}
${__V(YOUR_VARIABLE_NAME)}
I prefer the second option as it allows combining several variables, evaluating functions, etc.

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