How to run gatling scenarios in sequence

Gatling (Open-Source)
1

I have created a simple gatling maven application to test performance, verify API rate limit(so if sent requests more than its rate limit it should fail) . In order to run each api as an independent operation and not concurrently, I have created separate simulation classes for each API call to test.
In order to run them in a sequential order I have enabled runMultipleSimulations .
Following eg from galting doc: https://gatling.io/docs/3.0/extensions/maven_plugin/

But I don’t think they are running in sequential order and one scenario that I see from logs, is mostly showing failed user requests with 500 internal server errors, neither I see all test scenarios in logs . Do I need anything else beyond including this dependency ? Here is my pom.xml :

`

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>rate-limiting</groupId>
    <artifactId>rate-limiting</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <gatling-plugin.version>3.0.1</gatling-plugin.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>io.gatling.highcharts</groupId>
            <artifactId>gatling-charts-highcharts</artifactId>
            <version>3.1.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <testSourceDirectory>src/test/scala</testSourceDirectory>
        <plugins>
            <plugin>
                <groupId>io.gatling</groupId>
                <artifactId>gatling-maven-plugin</artifactId>
                <version>${gatling-plugin.version}</version>

                <configuration>
                    <runMultipleSimulations>true</runMultipleSimulations>
                </configuration>

                <executions>
                    <execution>
                        <goals>
                            <goal>test</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

`

Below is how my project structure looks and action class as well as scenario simulation classes resides under src/test/scala:
ratelimiting

  • src
  • test
  • resources
  • scala
  • Actions
  • CreateAPISimulation
  • GetAPISimulation
  • DeleteAPISimulation

Eg: of a scenario file :

`

class DeleteAPISimulation extends Simulation {
  var test = ""

  val preScenario = scenario(" DELETE API PRE-SCENARIO")
    .exec(CreateResource())
    .exec(session => {
      test = session("resourceId").as[String].trim
      println("%%%%%%%%%%% resource ID =====>>>>>>>>>> " + test)
      session}
    )
  val deleteResourceScenario = scenario("DELETE API TEST SCENARIO")
    // Set it here
    .exec(_.set("resourceId", test))
    .exec(DeleteResource())

  setUp(
    preScenario.inject(atOnceUsers(1)),
    deleteResourceScenario.inject(rampUsers(520) during(60))
  )

}

`
Similarly I created one .scala file for each API scenario.

Actions class just has the DSL http requests implementations for APIs. Eg:

`

object Actions{

def DeleteResource():HttpRequestBuilder = {
  http("DELETE_RESOURCE_OPERATION")
    .delete(Host+ "/items/${resourceId}")
    .header("Authorization", "Bearer "+ Token)
    .check(status.is(200))
}
.
.
//and so on
// similar api method requests so on

.
}

`

Can someone please look at this and guide me if I’m doing correctly and whether they should be executed in sequential order just with above defined manner.