Pass variable as attribute to XML body - scala

Question

I am creating a Gatling load test in Scala and I wish to create a HTTP POST request with attribute.
val getServiceCall = http("get service call")
.post("/MyService")
.headers(header)
.body(ElFileBody("templates/GetServiceCallRqTemplate.xml"))
.check(status.is(200))
And this is a snippet from my xml:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<pus:GetServiceCallRq>
<com:header>
<com:type>pus:GetServiceCallRq</com:type>
<com:timestamp>timestamp</com:timestamp>
<com:source>source</com:source>
<com:destination>destination</com:destination>
<com:serverNode>serverNode</com:serverNode>
</com:header>
<pus:body>
<pus:reference>${reference}</pus:reference>
....
I would like to pass the ${reference} attribute from a variable creating within my code - and not from a csv file.
How is it possible to pass it as a request param?

Answer 1

using a feeder (csv file) is not the only way to get a value into a session parameter.
you could also set the value manually via a session action
exec(session => session.set("reference", "ref0001"))
or via a check on an earlier request (whatever is in the 'ref' key in the response gets saved to the ${reference} variable
exec(
http("setupReq")
.get("someURL")
.check(
jsonPath("$.ref").saveAs("reference")
)
)
or even by creating your own custom feeder - for example, if you just wanted to generate random references
//somewhere at the top of your scala class
private val refs = Iterator.continually(
Map("reference" -> (Random.alphanumeric take 10 mkString).toUpperCase())
)
//then later in your scenario...
.feed(refs) //will put a new random string into ${reference}
//then make your "get service call" request