I am using Jmeter for Load Testing. In Jmeter i am creating Scenario for load test.
There is two option available as given below-
ThreadGroup -> ConfigElement -> HttprequestDefaults
and
ThreadGroup -> Sampler -> Httprequest.
I want to know that what is difference between these two options(HttprequestDefaults and Httprequest) while creating scenario.
HttprequestDefaults sets the default values for the Httprequest controllers in the test plan. So the actual HTTP request is peformed by Httprequest sampler and HttprequestDefaults configures HTTP request samplers as implied by its control type ConfigElement.
HttprequestDefaults and Httprequest works on concept of Global and Local Variable
If you set any values in HttprequestDefaults, It will apply on all httprequest
For Example: Domain Name, Proxy server Name, Protocol etc. ; You don't need to go one by one in all the httprequest to do that
And if, In a scenario any httprequest values is different than httprequestdefaults (Global Variable) ; It will take httprequest values in scenario run (Local Variable) (Priority)
Hope this helps !
Related
In perf tests, I have the below scenario.
the first graphql call fetches multiple account numbers
Next, multiple graphql calls are triggered in parallel - one for each account number in the above response. URL is the same, but the request body has different account numbers.
I added a JSR223 postprocessor for the first request and read account numbers into a list (added them to vars). I can read the list in JSR223 sampler but I cannot find how to use the list to make parallel graphql calls.
The number of parallel graphql calls is equal to the size of the list. The url of requests is the same, the account number in the payload needs to be different.
I can only think of using Parallel Sampler, you can dynamically add children (HTTP requests to execute) using JSR223 PreProcessor like:
1.upto(vars.get('var_matchNr') as int, { index ->
sampler.addURL(vars.get('var_' + index))
})
make sure that your var_1, var_2, etc. variables contain the full URL with the parameters
Parallel Sampler and Controller are not the part of official JMeter distribution, they need to be installed using JMeter Plugins Manager
More information: How to Use the Parallel Controller in JMeter
I have JDBC request, what give me 10 values. Also i have ThreadGroup from 10 user. I need launch HTTP request in my service, but for different user i need different value from me JDBC. How can i do that?
Define "Variable Name" in the JDBC Request sampler like:
It will give you the following JMeter Variables (observable by the Debug Sampler):
foo_1=xxx
foo_2=yyy
foo_3=zzz
...
foo_#=10
Now you can access a different variable with the different JMeter virtual user using __threadNum() and __V() functions combination like:
${__V(foo_${__threadNum},)}
More information: Here’s What to Do to Combine Multiple JMeter Variables
So I have a REST API that I want to test with JMeter.
I have few different paths in the REST Service.
If we take an example of simple REST service that will calculate based on two values passed in request, I have four different paths
/add
/sub
/mul
/div
Now I want to test this with a 5000 requests but want to randomize the path and the values in request parameters in each request. Also if possible, want to get the results in 4 categories separately for each path.
Can someone please suggest the right combination of elements?
I am very new to JMeter and hence, expect a little elaborated answer. :)
The fastest and the easiest way is using __chooseRandom() function available via JMeter Plugins. The relevant configuration of the HTTP Request Sampler would be:
Path: /${__chooseRandom(add,sub,mul,div,path)} - get a random option and store it into ${path} JMeter Variable
Name: ${path} - change HTTP Request Sampler Label (for separate reporting)
You can install __chooseRandom() and other plugins Functions via JMeter Plugins Manager from the "Available Plugins" tab:
Be aware that your requests will be random hence your test scenario won't be repeatable so I would recommend considering using other test elements instead i.e. Throughput Controller or Switch Controller or Weighted Switch Controller.
See Running JMeter Samplers with Defined Percentage Probability article for above test elements configuration details.
JMeter provides a simple HTTP server, the HTTP Mirror Server (https://jmeter.apache.org/usermanual/component_reference.html#HTTP_Mirror_Server), which causes JMeter to simply mirror back any request that is sent to it.
Instead of mirroring a given request, is there a way for JMeter to accept a request and then, based on the request, execute a series of actions?
You can use i.e. a Beanshell Sampler which allows execution of arbitrary Beanshell (or Java) code so you should be able to develop logic parsing incoming request and conditionally switch to this or that actions branch.
Test plan outline
Thread Group
Beanshell Sampler
If Controller (condition 1)
action 1
action 2
If Controller (condition 2)
action 3
action 4
In Beanshell Sampler place custom code which will listen to incoming HTTP connections and set a JMeter variable basing on outcome via vars.put method
In the If Controller you can put a condition checking variable value like
In "If Controller (condition 1)" - "${myVariable}"=="foo"
In "If Controller (condition 2)" - "${myVariable}"=="bar"
See How to use BeanShell: JMeter's favorite built-in component for detailed information on Beanshell scripting and pre-defined variables and If Controller documentation entry for information on setting correct conditions.
Need some help on Jmeter for the following scenario please I need to simulate these steps in order to load our application.
a) make a request to a web-service.(done)
b) verify the response for some variables and extract a URL address from the response.(done)
c) Now using the extracted URL need to make another request.(extraction done)
d) in response a media file will be sent.
My Plan consists of "stepping thread group-->(Sampler 1)HTTP Request +couple of listeners for data gathering--> (Sampler 2)HTTP Request +couple of listeners for data gathering. the issue is that when i ran the plan the first sampler generated 4 requests but the second one generated only 2 can you tell me why is it so.
In general how can i simulate all 4 steps in one go for a single thread. I hope that i have cleared myself.
In JMeter each thread runs requests sequentially already.
So in order to do what you expect you'll need to use:
Post Processors called extractors to extract data into variables
Variables to inject in the requests
Read:
https://jmeter.apache.org/usermanual/test_plan.html#postprocessors
https://jmeter.apache.org/usermanual/functions.html#functions