# ConfigFactory and config files for environment specific test runs **URL:** \ **Category:** Gatling (Open-Source)\ **Created:** [February 23, 2021, 9:46pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997 "2021-02-23T21:46:21Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Jason\_Eales](https://avatars.discourse-cdn.com/v4/letter/j/a8b319/32.png) [@Jason\_Eales](https://community.gatling.io/u/Jason_Eales)\ **Post date:** [February 23, 2021, 9:46pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/1 "2021-02-23T21:46:21Z")
Hi **My setup** - Visual Studio Code with the Scala extension - Gatling 3.4 (Open-Source) - Start tests using the following command line - I use Powershell to run this command - .\gatling.bat --simulation “api.private” **The question** I would like to have more information on how I setup my Gatling so that, from the command line i can run my tests against a particular environment (eg. Acceptance, Test, Dev) Through some investigation I have found the ConfigFactory and have managed to use it with a new custom config file named accp.config. However Im unable to supply this config file as part of the command line options! [https://gatling.io/docs/current/general/configuration/#zip-bundle-command-line-options](https://gatling.io/docs/current/general/configuration/#zip-bundle-command-line-options) What is a good approach to use to get this to work the way I expect? ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [February 23, 2021, 9:52pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/2 "2021-02-23T21:52:17Z")
Use [Java System properties](https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html). You can pass them from the command line .\gatling.bat --simulation “api.private” -Dfoo=bar ---
**Author:** ![Jason\_Eales](https://avatars.discourse-cdn.com/v4/letter/j/a8b319/32.png) [@Jason\_Eales](https://community.gatling.io/u/Jason_Eales)\ **Post date:** [February 23, 2021, 10:27pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/3 "2021-02-23T22:27:47Z")
Thanks Stephane ill give it a try 👍 ---
**Author:** ![Jason\_Eales](https://avatars.discourse-cdn.com/v4/letter/j/a8b319/32.png) [@Jason\_Eales](https://community.gatling.io/u/Jason_Eales)\ **Post date:** [February 23, 2021, 11:47pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/4 "2021-02-23T23:47:41Z")
@Stéphane Landelle nah mate that does not work. In the Powershell command typed **.\gatling.bat --simulation “api.private” -Dfoo=bar** and added the following lines to me code **var h = System.getProperty(“foo”)** **println(“h=” + h)** when i ran it i get the message **Warning: Unknown option -Dfoo=bar** **h=null** The test ran successfully but the “foo bar” part did not pull the data from the command line any ideas as to what im doing incorrectly? PS: I also tried this and it too did not work [Passing Parameters – Gatling Open-Source Load Testing Documentation](https://gatling.io/docs/current/cookbook/passing_parameters/) ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [February 24, 2021, 6:40am UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/5 "2021-02-24T06:40:37Z")
Right, for the bundle, you have to set the JAVA\_OPTS env var with the System props you want, eg -Dfoo=bar ---
**Author:** ![Sri\_Harsha\_G](https://avatars.discourse-cdn.com/v4/letter/s/5daacb/32.png) [@Sri\_Harsha\_G](https://community.gatling.io/u/Sri_Harsha_G)\ **Post date:** [March 4, 2021, 3:52pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/6 "2021-03-04T15:52:35Z")
Hi, If you use gradle plugin for gatling it will be helpful [https://github.com/gatling/gatling-gradle-plugin](https://github.com/gatling/gatling-gradle-plugin) Setup gradle as the build tool instead of using bat file for execution ---
**Author:** ![Jason\_Eales](https://avatars.discourse-cdn.com/v4/letter/j/a8b319/32.png) [@Jason\_Eales](https://community.gatling.io/u/Jason_Eales)\ **Post date:** [March 4, 2021, 9:55pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/7 "2021-03-04T21:55:14Z")
Hi I have managed to get it working in PowerShell. **Param(** **[Parameter(Mandatory=$true)]** **[ValidateSet(“PROD”, “ACCP”, “TEST”)]** **$environment** **)** **Set-Variable JAVAOPTS\_ENV\_PARAM -Option Constant -Value ([string]"-Denvironment=")** **$javaoptsenv = $JAVAOPTS\_ENV\_PARAM + $environment** **Set-Item ENV:JAVA\_OPTS $javaoptsenv** **$simname = "test.sim"** **$gatsim = ".\gatling.bat --simulation $testsim"** **&cmd /c $gatsim** ---
**Author:** ![Sri\_Harsha\_G](https://avatars.discourse-cdn.com/v4/letter/s/5daacb/32.png) [@Sri\_Harsha\_G](https://community.gatling.io/u/Sri_Harsha_G)\ **Post date:** [March 5, 2021, 2:52pm UTC](https://community.gatling.io/t/configfactory-and-config-files-for-environment-specific-test-runs/5997/8 "2021-03-05T14:52:49Z")
ok… looks good. but if you want to have a proper implementation, I would prefer using gradle build tool and gatling gradle plugin Build.gradle sourceSets{ gatling { resources.srcDir “src/gatling/resources/” scala.srcDir “src/gatling/simulations/” scala.srcDir “src/gatling/java” scala.srcDir “src/gatling/scala” } } gatling { toolVersion = ‘3.3.1’ logLevel = ‘WARN’ jvmArgs = [’-server’, ‘-Xmx4G’, ‘-XX:+UseG1GC’, ‘-XX:MaxGCPauseMillis=30’, ‘-XX:G1HeapRegionSize=16m’, ‘-XX:InitiatingHeapOccupancyPercent=75’, ‘-XX:+ParallelRefProcEnabled’, ‘-XX:+PerfDisableSharedMem’, ‘-XX:+AggressiveOpts’, ‘-XX:+OptimizeStringConcat’, ‘-XX:+HeapDumpOnOutOfMemoryError’] systemProperties = [‘file.encoding’: ‘UTF-8’] simulations = { include “**/\*.scala" include "**/_/_.scala” } } **Simulation : fetching variables from commandline args and parameters** val env = System.getProperty(“env”) val envConf = ConfigFactory.load(“conf/environment.conf”) val baseURL = envConf.getString(s"$env.baseURL") val authUser= envConf.getString(s"$env.user") val authPassword = envConf.getString(s"$env.password")