vSphere 6.0 Task and events notification

Hi ,

Is there a way where we can subscribe to the events and task status and vSphere can notify us when the event/task happens/completes.

My goal is to get the notifications from vSphere tasks and events , without having to poll for task/events from vSphere.  I am thinking of exposing an endpoint by extending the interface from vSphere management SDK (6.0)  and configure that endpoint in vSphere  , and get notified on tasks and events as it happens on vSphere instead of me polling the vSphere.

I am not sure if it is possible , any help/sample/documentation is appreciated.

Thanks

-Sada