Package com.mapr.fs.hbase.filter

Class KeySamplingFilter

  • @Public
@Stable
public class KeySamplingFilter
extends org.apache.hadoop.hbase.filter.FilterBase
    A filter that will only return the first KV from each row.

    This filter can be used to more efficiently perform row count operations.

    • Nested Class Summary

      • Nested classes/interfaces inherited from class org.apache.hadoop.hbase.filter.Filter

        org.apache.hadoop.hbase.filter.Filter.ReturnCode

    • Field Summary

      • Fields inherited from class org.apache.hadoop.hbase.filter.Filter

        reversed

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static org.apache.hadoop.hbase.filter.Filter createFilterFromArguments​(java.util.ArrayList<byte[]> filterArguments)  
      org.apache.hadoop.hbase.filter.Filter.ReturnCode filterKeyValue​(org.apache.hadoop.hbase.Cell v)  
      static KeySamplingFilter parseFrom​(byte[] pbBytes)  

      • Methods inherited from class org.apache.hadoop.hbase.filter.FilterBase

        filterAllRemaining, filterRow, filterRowCells, filterRowKey, getNextCellHint, getNextKeyHint, hasFilterRow, isFamilyEssential, reset, toByteArray, toString, transform, transformCell

      • Methods inherited from class org.apache.hadoop.hbase.filter.Filter

        isReversed, setReversed

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • KeySamplingFilter

        public KeySamplingFilter()

    • Method Detail

      • createFilterFromArguments

        public static org.apache.hadoop.hbase.filter.Filter createFilterFromArguments​(java.util.ArrayList<byte[]> filterArguments)

      • parseFrom

        public static KeySamplingFilter parseFrom​(byte[] pbBytes)
                                   throws org.apache.hadoop.hbase.exceptions.DeserializationException
        Parameters:
        pbBytes - A pb serialized FirstKeyOnlyFilter instance
        Returns:
        An instance of FirstKeyOnlyFilter made from bytes
        Throws:
        org.apache.hadoop.hbase.exceptions.DeserializationException
        See Also:
        FilterBase.toByteArray()

      • filterKeyValue

        public org.apache.hadoop.hbase.filter.Filter.ReturnCode filterKeyValue​(org.apache.hadoop.hbase.Cell v)
                                                                throws java.io.IOException
        Specified by:
        filterKeyValue in class org.apache.hadoop.hbase.filter.Filter
        Throws:
        java.io.IOException