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module Shell
  module Commands
    class Append < Command
      def help
        <<-EOF
Appends a cell 'value' at specified table/row/column coordinates.

  hbase> append 't1', 'r1', 'c1', 'value', ATTRIBUTES=>{'mykey'=>'myvalue'}
  hbase> append 't1', 'r1', 'c1', 'value', {VISIBILITY=>'PRIVATE|SECRET'}

The same commands also can be run on a table reference. Suppose you had a reference
t to table 't1', the corresponding command would be:

  hbase> t.append 'r1', 'c1', 'value', ATTRIBUTES=>{'mykey'=>'myvalue'}
  hbase> t.append 'r1', 'c1', 'value', {VISIBILITY=>'PRIVATE|SECRET'}
EOF
      end

      def command(table_name, row, column, value, args = {})
        table = table(table_name)
        @start_time = Time.now
        append(table, row, column, value, args)
      end

      def append(table, row, column, value, args = {})
        if current_value = table._append_internal(row, column, value, args)
          puts "CURRENT VALUE = #{current_value}"
        end
      end
    end
  end
end

# add append command to Table
::Hbase::Table.add_shell_command('append')
