how to check whether one client connected to the apache apollo broker

[zpy...@mobvoi.com]

Hi,

       I am developping one server push platform, and I use the mqtt (apache apollo as broker, Eclipse paho as client ) , I want to implement one function:

       

                                     when one client disconnect from the broker abnormal, i want to retrieve the disconnected info. in order to make it , the client register on will message when it connects to the broker.

                                     in this way I can receive the disconnected info, but it is delayed before I receive the disconnect info.   

                                     I expected to receive the disconnected info instant when the client disconnected from the broker abnormally. who can give me a help? thanks a lot.

Best wishes,

  Roger