A way to notify that a sendSync message has reached all the clients?

[nvd_ai]

Hi all,

In my application, before running a garbage collector, I need to send a kind of "prepare" message to all clients and then run the garbage collector only when all the clients have received the "prepare" message. Is there a way that when a client sends "prepare" message using sendSync, it waits for an "ack" which is triggered only when all the clients have received the message?

Thanks!

Navid