hbase-shell/src/main/ruby/shell/commands/list_snapshots.rb

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#     http://www.apache.org/licenses/LICENSE-2.0
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require 'time'

module Shell
  module Commands
    class ListSnapshots < Command
      def help
        <<-EOF
List all snapshots taken (by printing the names and relative information).
Optional regular expression parameter could be used to filter the output
by snapshot name.

Examples:
  hbase> list_snapshots
  hbase> list_snapshots 'abc.*'
EOF
      end

      def command(regex = '.*')
        formatter.header(['SNAPSHOT', 'TABLE + CREATION TIME'])

        list = admin.list_snapshot(regex)
        list.each do |snapshot|
          creation_time = Time.at(snapshot.getCreationTime / 1000).to_s
          formatter.row([snapshot.getName, snapshot.getTableNameAsString + ' (' + creation_time + ')'])
        end

        formatter.footer(list.size)
        list.map(&:getName)
      end
    end
  end
end