Class: LdbEngin

Inherits:
Object
  • Object
show all
Defined in:
lib/ldb_engin.rb

Instance Method Summary collapse

Constructor Details

#initialize(dbdir) ⇒ LdbEngin

Returns a new instance of LdbEngin.



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# File 'lib/ldb_engin.rb', line 6

def initialize(dbdir)
    @db = LevelDB::DB.new dbdir
end

Instance Method Details

#dump(rowcount, keybyte, valuebyte) ⇒ Object 



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# File 'lib/ldb_engin.rb', line 10

def dump(rowcount, keybyte, valuebyte)
    raise "keybyte(#{keybyte}) is too small for #{rowcount} rows." if rowcount.to_s.length > keybyte


    puts "dump level-db with #{rowcount} rows. key = #{keybyte} bytes, value = #{valuebyte} bytes."
    tstart = Time.new
    (0..rowcount).each do |id| 
        key = id.to_s.rjust(keybyte, '0')
        value = id.to_s.rjust(valuebyte, '-')
        @db[key] = value
    end
    puts "dump finished. #{Time.new - tstart} seconds elapsed."

end