Is there a way to use Spring boot beans in a Gatling simulation? - spring

Question

I am currently writing a Spring boot application that will perform loadtests on another app. I want to use Gatling to manage the tests, but I need it to access the configuration that I defined in beans of my Spring app.
Here is what I would like to see working :
public class MySimulation extends Simulation {
#Autowired
private JMSConnectionFactoryBeanClass myConnectionFactory;
public MySimulation() {
JmsProtocolBuilder jmsProtocol = jms.connectionFactory(myBean);
ScenarioBuilder scn = scenario("My Simulation Scenario")
.exec(
jms("test")
.send()
.queue("myQueue")
.textMessage("message")
);
{
setUp(
scn.injectOpen(rampUsers(10).during(5))
).protocols(jmsProtocol);
}
}
When I hardcode the configuration into the simulation class and remove all #Autowired thing, everything works, so it must be comming from the dependency injection. Does anybody know if there is a way to us spring beans in a gatling simulation ?

Answer 1

Following Stéphane Landelle advice, here is what I came up with, but instead of creating my app context inside of the simulation, I figured out how to run the simulation along with my spring app using gatling API :
public class GatlingRunner {
public static void run() {
GatlingPropertiesBuilder props = new GatlingPropertiesBuilder();
props.simulationClass("path.to.Simulation");
Gatling.fromMap(props.build());
}
}
This is how I modified my spring app :
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
GatlingRunner.run();
}
}
Finally, to use spring beans in the simulation, I wrote a context provider that would make the link between spring and gatling :
#Component
public class ApplicationContextProvider implements ApplicationContextAware {
private static ApplicationContext context;
public static ApplicationContext getApplicationContext() {
return context;
}
#Override
public void setApplicationContext(ApplicationContext context)
throws BeansException {
ApplicationContextProvider.context = context;
}
}
Now, to get a bean inside of the simulation, all I needed was this :
Bean myBean = ApplicationContextProvider.getApplicationContext()
.getBean("myBean", Bean.class)

Answer 2

You can't use #Autowired. You have to create an ApplicationContext programmatically and pull the JMSConnectionFactoryBeanClass from it.

Answer 3

#RunWith(SpringRunner.class)
#ContextConfiguration(classes = MySimulation.class, loader = SpringApplicationContextLoader.class)
public class MySimulation extends GatlingTest {
#Autowired
private JMSConnectionFactoryBeanClass myConnectionFactory;
#Test
public void test() {
...
}
}