Printing Session Values for debugging

Gatling (Open-Source)
1

Hi, I am trying to capture the session details in JAVA using the below code but unfortunately, it is not working.

Reference: Gatling - Debugging

.exec(
  http("request_5")
    .post("/services/login/json")
    .formParam("userName", "xyz")
    .formParam("password", "***")
    .formParam("saveUserName", "false")
    .formParam("isSubmitting", "true")
    .exec(session -> {
      System.out.println(session.getString("session"));
      return session;
    })
);
2

By “it’s not working”, you mean “it doesn’t compile”.

When things don’t compile, it means you have a syntax error.

Indeed, your second exec block is not at the right place:

.exec(
  http("request_5")
    .post("/services/login/json")
    .formParam("userName", "xyz")
    .formParam("password", "***")
    .formParam("saveUserName", "false")
    .formParam("isSubmitting", "true")
)
.exec(session -> {
  System.out.println(session.getString("session"));
  return session;
});
3

Thanks Stéphane, your are right. Actually, we are doing POC to migrate from Jmeter to Gatling. Understand there’s a steep learning curve to achieve this.

BTW, I did try the above code but it is not printing session details. I have gone through the Session API tutorial - Gatling - Session API but not sure how to retrieve the content and what all attributes a session holds. I think there’s an issue with my println statement:
System.out.println(session.getString(“session”));
Here .getString(“What should I write here to retrieve all the session details”)

My main goal is to capture responses for the failed transactions/requests. Many Thanks in advance, I will work with Arnaud from gatling to get more details.

.exec(
  http("request_5")
    .post("/services/login/json")
    .formParam("userName", "xyz")
    .formParam("password", "***")
    .formParam("saveUserName", "false")
    .formParam("isSubmitting", "true")
)
.exec(session -> {
  System.out.println(session.getString("session"));
  return session;
});
4

I realize that I’ve forgotten to override Java Session’s toString, see Core: Java Session misses toString override · Issue #4228 · gatling/gatling · GitHub

As a workaround, you can do:

System.out.println(session.asScala());

My main goal is to capture responses for the failed transactions/requests.

That’s not the kind of things you’ll find in the Session. The Session is only the memory space for each virtual user where you can store and fetch back some data.

5

Thanks, I see session details printed now.

6

Oh, wow. I’ve been so busy with my head down writing tests, I didn’t think long enough to report a bug. Been working with Java DSL (thank you, by the way) and just relied on independently logging my vars but I enabled trace most of the time and looked at the session vars there.