Is it posible to access the HTTP request object from inside a helper class? If yes, how?

so I have a custom class located in /bluegrass/core/src/main/java/com/bluegrass/core/imp/view/components/MyCustomerHelper.java

I'm wondering if it's possible to access the HTTP request object from this section? If yes, how?

Here's a snippet of the class declaration.

public class CourseListHelper extends BaseWCMPojo {
  public void activate() throws Exception {
    //more code here
  }
}

I understand it can be done via servlet but I have the impression that to access the servlet, I need to access it via HTTP (like an AJAX request).

I'm wondering if a servlet can  be access like this:

<sly data-sly-use.grasses="com.bluegrass.core.impl.view.components.MyCustomHelper">

Thanks a lot!