org.apache.lens.server.api.metastore

Interface DataCompletenessChecker

All Known Implementing Classes:

DefaultChecker

public interface DataCompletenessChecker

DataCompletenessChecker is for identifying the completeness of data in a fact for the given set of measures, start and end date. A fact will have a dataCompletenessTag, multiple facts can have the same dataCompletenessTag. Similarly, measures will have a dataCompletenessTag, multiple measures can have the same dataCompletenessTag. The api will take the dataCompletenessTag for the facts and measures and compute the completeness based on these tags. The utility of having tags is that the similar kind of measures or facts which will have the same level of completeness can use the same tag, thus we avoid the redundant completeness computation for similar measures and facts. The implementations of the interface can truncate the start and end date.

Method Summary

Modifier and Type	Method and Description
Map<String,Map<Date,Float>>	getCompleteness(String factTag, Date start, Date end, Set<String> measureTag) Get completeness of the set of measures in a fact based on the dataCompletenessTag for the given starttime and endtime.

Method Detail

getCompleteness

Map<String,Map<Date,Float>> getCompleteness(String factTag,
                                            Date start,
                                            Date end,
                                            Set<String> measureTag)
                                     throws LensException

Get completeness of the set of measures in a fact based on the dataCompletenessTag for the given starttime and endtime.

Parameters:

factTag - This is the dataCompletenessTag for a fact. The tag can be specified by setting the property named dataCompletenessTag for the fact. Mutltiple facts can have the same dataCompletenessTag.

start - Start time of the query (Inclusive).

end - End time of the query (Exclusive).

measureTag - List of distinct tag of the measures in the query. Multiple measures can have the same dataCompletenessTag.

Returns:

map; key is the name of the dataCompletenessTag which refers to one or more measures. Value is the map of date and %completeness.

Throws:

LensException