RowKeyUtil (Cloud Bigtable HBase Client for Java 1.12.0 API)

com.google.cloud.bigtable.util

Class RowKeyUtil

• java.lang.Object
• • com.google.cloud.bigtable.util.RowKeyUtil

• ---

  
  

  public class RowKeyUtil
  extends Object

• • Constructor Summary

    Constructors 

    Constructor and Description
    RowKeyUtil()

  • Method Summary

    All Methods Static Methods Concrete Methods 

    Modifier and Type	Method and Description
    static byte[]	calculateTheClosestNextRowKeyForPrefix(byte[] rowKeyPrefix) When scanning for a prefix the scan should stop immediately after the the last row that has the specified prefix.

    • Methods inherited from class java.lang.Object

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

• • Constructor Detail

    • RowKeyUtil

      public RowKeyUtil()

  • Method Detail

    • calculateTheClosestNextRowKeyForPrefix

      public static byte[] calculateTheClosestNextRowKeyForPrefix(byte[] rowKeyPrefix)

      When scanning for a prefix the scan should stop immediately after the the last row that has the specified prefix. This method calculates the closest next rowKey immediately following the given rowKeyPrefix.

      IMPORTANT: This converts a rowKeyPrefix into a rowKey.

      If the prefix is an 'ASCII' string put into a byte[] then this is easy because you can simply increment the last byte of the array. But if your application uses real binary rowids you may run into the scenario that your prefix is something like:    { 0x12, 0x23, 0xFF, 0xFF }
      Then this stopRow needs to be fed into the actual scan
         { 0x12, 0x24 } (Notice that it is shorter now)
      This method calculates the correct stop row value for this usecase.

      Parameters:

      rowKeyPrefix - the rowKeyPrefix.

      Returns:

      the closest next rowKey immediately following the given rowKeyPrefix.