Package org.apache.druid.data

Interface SearchableVersionedDataFinder<DataDescriptor>

Type Parameters:
DataDescriptor - The containing type for the data. A simple example would be URI
public interface SearchableVersionedDataFinder<DataDescriptor>
A class which implements SearchableVersionedDataFinder can find a DataDescriptor which describes the most up to date version of data given a base descriptor and a matching pattern. "Version" is completely dependent on the implementation but is commonly equal to the "last modified" timestamp. This is implemented explicitly for org.apache.druid.query.lookup.namespace.CacheGenerator If you have a use case for this interface beyond CacheGenerator please bring it up in the dev list.

  • Method Summary

    Modifier and Type
    Method
    Description
    DataDescriptor
    getLatestVersion(DataDescriptor descriptorBase, Pattern pattern)
    Get's a DataDescriptor to the latest "version" of a data quantum starting with descriptorBase and matching based on pattern

  • Method Details

    • getLatestVersion

      DataDescriptor getLatestVersion(DataDescriptor descriptorBase, @Nullable Pattern pattern)
      Get's a DataDescriptor to the latest "version" of a data quantum starting with descriptorBase and matching based on pattern
      Parameters:
      descriptorBase - The base unit of describing the data.
      pattern - A pattern which must match in order for a DataDescriptor to be considered.
      Returns:
      A DataDescriptor which matches pattern, is a child of descriptorBase, and is of the most recent "version" at some point during the method execution.