onSubscribe-Notification

We are currently evaluating Lightstreamer and ran into the following problem.

We need to send a message from a web client as soon as the connection to Lightstreamer is established. Unfortunately, sometimes this message is being sent before a successful subscription, which means that this message cannot be sent, because of a missing listener in the java adapter.

Is there any possibilty to the let the web client know (via Javascript) that a subscription was successful? Or is there another way to solve this problem?

Best regards,
Oliver

The successful subscription notification is done through the table onStart callback.