Request Tracker

The driver provides the IRequestTracker interface that tracks the requests at Session and Node levels. It contains start, finish, and error events that can be subscribed by implementing the interface, and should be used by passing the implementation as an argument of the method WithRequestTracker that is available in the Builder.

An example of an IRequestTracker implementation is the extension package Cassandra.OpenTelemetry that can be checked in the documentation.

Available events

The full API doc is available here but the list below summarizes the events are available in the tracker:

• OnStartAsync - that is triggered when a session level request starts.
• OnSuccessAsync - that is triggered when the session level request finishes successfully.
• OnErrorAsync - that is triggered when the session level request finishes unsuccessfully.
• OnNodeStartAsync - that is triggered when the node request starts
• OnNodeSuccessAsync - that is triggered when the node level request finishes successfully.
• OnNodeErrorAsync - that is triggered when the node request finishes unsuccessfully.
• OnNodeAbortedAsync - that is triggered when the node request is aborted (e.g. pending speculative execution).