=== WaitSetDataSubscriber
=== [WaitSetDataSubscriber] Query : message = "Hello again"
=== [WaitSetDataSubscriber] Ready ...

!!! a MsgWriter joined

    --- New message received ---
    userID  : 1
    Message : "First Hello"

    --- message received (with QueryCOndition on message field) ---
    userID  : 1
    Message : "Hello again"

!!! a MsgWriter lost its liveliness
