I am writing a gateway between a proprietary protocol and BACnet, where a large number of data points should be exposed as BACnet points. I need to know when any BACnet client subscribed an object for data delivery to start polling for values on the backend. Any idea where to hook?
Notification when client subscribed an object
I'm not overly familiar with the BACnet protocol but I have worked with this code some. Perhaps the class:
is fired on the client side when a BACnet client receives a value change from a BACnet server. What I need is the opposite - I need an event on the server side when a client starts to poll for a BACnetObject property (in my case the PresentValue). The proper place for a hook could be
Both are not easy to implement via subclassing (Bacnet4J library does not allow me to add my own MixIn, for example) so I ended by changing the original source code.