stats

Type Members

1. trait GeoMesaStats extends Closeable

   

   Tracks stats for a schema - spatial/temporal bounds, number of records, etc.

   Tracks stats for a schema - spatial/temporal bounds, number of records, etc. Persistence of stats is not part of this trait, as different implementations will likely have different method signatures.

2. trait HasGeoMesaStats extends AnyRef

   

   Marker trait for classes with stats

3. abstract class MetadataBackedStats extends RunnableStats with StatsBasedEstimator

   

   Tracks stats via entries stored in metadata

4. class RunnableStats extends GeoMesaStats with LazyLogging

   

   Runnable stats implementation, doesn't persist stat values.

   Runnable stats implementation, doesn't persist stat values. DataStore needs to be able to handle stat query hints

5. trait StatsBasedEstimator extends AnyRef

   

   Estimate query counts based on cached stats.

   Estimate query counts based on cached stats.

   Although this trait only requires a generic GeoMesaStats implementation mixin, it has been written based on MetadataBackedStats. In particular, getCount(Filter.INCLUDE) is expected to look up the stat and not invoke any methods in this trait. Also, only Frequency and Z3Histograms are split out by time interval, so filters are only passed in when reading those two types.