libgs.monitoring.Monitor.add_callback

Monitor.add_callback(callable)

Add a callable to be invoked every N times a value is polled.

Note

The callback will be executed in the same sub-thread that does the polling

The prototype of the callable should be

some_function(point_name, tstamp, exc, ret)

where

• point_name is the name of the monitor point that has been polled
• tstamp is the unix timestamp at which the monitor function returned a value (obtained wiht time.time()),
• exc is None if no exception happened, otherwise it is set to the exception that occurred.
• ret are the return values. Will always be an Alert object.

Parameters:callable – The callable

Returns: