Reading recent samples

When the status of the sample changes from Ready to some other state, or when a sample is created in the database, the SRO subscribes for sample data change notification to the middleware, and a list of output attributes are exposed in the SRO. The set of RecentSample attributes are updated by the SRO based on first in first out method. The sample information is maintained in the RecentSample group until it becomes the oldest sample in the set and is replaced by a new sample information.

For example, if the object is configured to keep track of the four most recent samples, and the four sets of recent sample attributes are populated, it overwrites the data of the oldest recent sample set when a new sample arrives. If RecentSample01 was the oldest, it becomes the latest record after a new sample arrives.

For more information about the output attributes, see Sample attributes available at run time.