How to access request client ip?

2

I see we are missing docs for this.

The client IP header needs an opt in to be available (as it has a slight performance overhead for each request). For the JVM SDK that is done by adding x-forwarded-for to the forwardedHeaders for the component(s) where you need it.

The API for doing that is a bit cumbersome though, you will need to drop down to calling Kalix#register yourself instead of using the generated KalixFactory, something like this (in Scala, Java should look roughly but not exactly the same):

def main(args: Array[String]): Unit = {
  val kalix = Kalix()
    .register(
      MyActionProvider(
        MyAction(_),
        ActionOptions.defaults.withForwardHeaders(Set("x-forwarded-for"))
      )
    )
  kalix.start()
}