How to pass command line input in Gatling using Scala script?

Gatling (Open-Source)
1

I want that user can input ‘Count, repeatCount, testServerUrl and definitionId’ from command line while executing from Gatling. Can anybody please help me? TIA.

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._

    class TestCLI extends Simulation {

        val **count** = 50
        val wait = 2
        val **repeatCount** = 2

        val **testServerUrl** = "Some url" 

        val scn = scenario("testabcd")
            .repeat (repeatCount ) {
                exec(http("asdfg")
                .post("""/xyzapi""")
                .headers(headers_0)
                .body(StringBody("""{"**definitionId**":10200121}"""))) // I also want to get this value dynamic from CLI and put here
                .pause(wait) 
            }                   

        setUp(scn.inject(atOnceUsers(count))).protocols(httpProtocol)

    }
2

Hi Pandya,

Configuration for gatling is here: http://gatling.io/docs/2.0.0-RC2/general/configuration.html

The one you’re looking for is probably JAVA_OPTS. I use this by modifying the gatling.sh script, setting

JAVA_OPTS="${JAVA_OPTS} -Dgatling_conf=${GATLING_CONF} -Dgatling_home=${GATLING_HOME}"

and then in the driver class

val gatlingHome = System.getProperty(“gatling_home”)

I hope that helps.

Kind regards,

Tony.

3

Hi Tony,

I have modified following code.

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._

    class TestCLI extends Simulation {

        val count = Integer.getInteger("users", 50).toint
        val wait = 2
        val repeatCount = Integer.getInteger("repeatCount", 2).toInt

        val testServerUrl = System.getProperty("testServerUrl")
        val definitionId  = java.lang.Long.getLong("definitionId", 0L)

        val httpProtocol = http
		.baseURL(testServerUrl)
		.inferHtmlResources()
		.acceptHeader("""*/*""")
		.acceptEncodingHeader("""gzip, deflate""")
		.acceptLanguageHeader("""en-US,en;q=0.8""")
		.authorizationHeader(envAuthenticationHeaderFromPostman)
		.connection("""keep-alive""")
		.contentTypeHeader("""application/vnd+json""")
		.userAgentHeader("""Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 Safari/537.36""")

	val headers_0 = Map(
		"""Cache-Control""" -> """no-cache""",
		"""Origin""" -> """chrome-extension://mmmmmmmmmmmm""")

val scn = scenario("testabcd")
            .repeat (repeatCount ) {
                exec(http("asdfg")
                .post("""/xyzapi""")
                .headers(headers_0)
                .body(StringBody("""{"definitionId":$definitionId}"""))) // I also want to get this value dynamic from CLI and put here
                .pause(wait) 
            }                   

        setUp(scn.inject(atOnceUsers(count))).protocols(httpProtocol)

    }

But gives this error while running,

`
D:\abc\gatling-charts-highcharts-bundle-2.1.7\bin>JAVA_OPTS="-DuserCount=50 -D flowRepeatCount=2 -DdefinitionId=10220301 -DtestServerUrl=‘something’"
gatling.b at ‘JAVA_OPTS’ is not recognized as an internal or external command, operable program or batch file.

`

4

Hi Pandya,

I’m guessing by the truncated “gatling.b” that you’re running this in Windows. I’m not entirely familiar with this (as I use a real operating system by choice :wink: ), but try “set JAVA_OPTS=…”

Also, you have a space in “-D flowRepeatCount=…” that might cause problems.

At this point, I’ll hand you on to any Windows people watching.

Kind regards,

Tony.

5

Hii Tony,

That JAVA_OPTS error got solved by adding java before JAVA_OPTS (java JAVA_OPTS arguments…) but one more error shows which is it could not find main class (as I dont have main class in my script)

D:\Ronak\gatling-charts-highcharts-bundle-2.1.7\bin>java JAVA_OPTS="-DuserCount= 50 -DflowRepeatCount=2 -DdefinitionId=10220301 -DtestServerUrl='something'" ./ga tling.bat Error: Could not find or load main class JAVA_OPTS=-DuserCount=50 -DflowRepeatCo unt=2 -DdefinitionId=10220301 -DtestServerUrl='something'

So, how can I add main class or any alternative solution without adding main class? script code I already added in previous thread.

Thanks.

6

Hi Pandya,

That’s not solved the problem. Doing

java “somelongstring” someotherstuff

just tells java to look for a class somelongstring, that has a main() method.

Kind regards,

Tony.

7

Hii,

I want that user can input ‘Count, repeatCount, testServerUrl and definitionId’ from command line while executing from Gatling. From command line I execute
`

export JAVA_OPTS=“-DuserCount=1 -DflowRepeatCount=1 -DdefinitionId=10220101 -DtestServerUrl=‘https://someurl.com’”
sudo bash gatling.sh`

but there is runtime error,
Errors --------------------------------------------------------------------
url null/api/workflows can't be parsed into a URI: scheme

URL which I provide is shown null

Here is the code snippet,

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._

class TestCLI extends Simulation {
val userCount = Integer.getInteger(“userCount”, 1).toInt
val holdEachUserToWait = 2
val flowRepeatCount = Integer.getInteger(“flowRepeatCount”, 2).toInt
val definitionId = java.lang.Long.getLong(“definitionId”, 0L)
val testServerUrl = System.getProperty(“testServerUrl”)

val httpProtocol = http
.baseURL(testServerUrl)
.inferHtmlResources()
.acceptHeader(“”“/”“”)
.acceptEncodingHeader(“”“gzip, deflate”“”)
.acceptLanguageHeader(“”“en-US,en;q=0.8"”“)
.authorizationHeader(envAuthenticationHeaderFromPostman)
.connection(”““keep-alive””“)
.contentTypeHeader(”““application/vnd.v7811+json””“)
.userAgentHeader(”““Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 Safari/537.36"””)

val headers_0 = Map(
“”“Cache-Control”“” → “”“no-cache”“”,
“”“Origin”“” → “”“chrome-extension://faswwegilgnpjigdojojuagwoowdkwmasem”“”)

val scn = scenario(“testabcd”)
.repeat (flowRepeatCount) {
exec(http(“asdfg”)
.post(“”“/api/workflows”“”)
.headers(headers_0)
.body(StringBody(“”“{“definitionId”:$definitionId}”“”))) // I also want to get this value dynamic from CLI and put here
.pause(holdEachUserToWait)
}

setUp(scn.inject(atOnceUsers(userCount))).protocols(httpProtocol)

}

Thanks.