Check the consistency of a read result. This method should be invoked if the check function
is defined for the migration and both reads ("new"/"old") were done.
The function will use the checkRatio to determine if the check should be executed, and it will record the result.
Example calling the check function from the migration config.
context.tracker.consistency(() => config.check!(oldValue.result, newValue.result));
If the consistency check function throws an exception, then the consistency check result will not be included in the generated event.
The function which executes the check. This is not the check function from the
migration options, but instead should be a parameter-less function that calls that function.
Create a migration op event. If the event could not be created, because of a missing operation, then undefined is returned.
Report that an error has occurred for the specified origin.
The origin of the error.
Call this to report that an origin was invoked (executed). There are some situations where the expectation is that both the old and new implementation will be used, but with writes it is possible that the non-authoritative will not execute. Reporting the execution allows for more accurate analytics.
The origin that was invoked.
Report the latency of an operation.
The origin the latency is being reported for.
The latency, in milliseconds, of the operation.
Sets the migration related operation associated with these tracking measurements.
The operation being tracked.
Used to track information related to a migration operation.