<s> """<STR_LIT>""" <EOL> import argparse <EOL> import json <EOL> import sys <EOL> from swift . common . ring import builder <EOL> from swift . common . ring . utils import parse_add_value <EOL> ARG_PARSER = argparse . ArgumentParser ( <EOL> description = '<STR_LIT>' ) <EOL> ARG_PARSER . add_argument ( <EOL> '<STR_LIT>' , '<STR_LIT:-c>' , action = '<STR_LIT:store_true>' , <EOL> help = "<STR_LIT>" ) <EOL> ARG_PARSER . add_argument ( <EOL> '<STR_LIT>' , <EOL> help = "<STR_LIT>" ) <EOL> class ParseCommandError ( ValueError ) : <EOL> def __init__ ( self , name , round_index , command_index , msg ) : <EOL> msg = "<STR_LIT>" % ( <EOL> name , round_index , command_index , msg ) <EOL> super ( ParseCommandError , self ) . __init__ ( msg ) <EOL> def _parse_weight ( round_index , command_index , weight_str ) : <EOL> try : <EOL> weight = float ( weight_str ) <EOL> except ValueError as err : <EOL> raise ParseCommandError ( '<STR_LIT>' , round_index , command_index , err ) <EOL> if weight < <NUM_LIT:0> : <EOL> raise ParseCommandError ( '<STR_LIT>' , round_index , command_index , <EOL> '<STR_LIT>' ) <EOL> return weight <EOL> def _parse_add_command ( round_index , command_index , command ) : <EOL> if len ( command ) != <NUM_LIT:3> : <EOL> raise ParseCommandError ( <EOL> '<STR_LIT>' , round_index , command_index , <EOL> '<STR_LIT>' % command ) <EOL> dev_str = command [ <NUM_LIT:1> ] <EOL> weight_str = command [ <NUM_LIT:2> ] <EOL> try : <EOL> dev = parse_add_value ( dev_str ) <EOL> except ValueError as err : <EOL> raise ParseCommandError ( '<STR_LIT>' , round_index , <EOL> command_index , err ) <EOL> dev [ '<STR_LIT>' ] = _parse_weight ( round_index , command_index , weight_str ) <EOL> if dev [ '<STR_LIT>' ] is None : <EOL> dev [ '<STR_LIT>' ] = <NUM_LIT:1> <EOL> default_key_map = { <EOL> '<STR_LIT>' : '<STR_LIT>' , <EOL> '<STR_LIT>' : '<STR_LIT:port>' , <EOL> } <EOL> for empty_key , default_key in default_key_map . items ( ) : <EOL> if dev [ empty_key ] is None : <EOL> dev [ empty_key ] = dev [ default_key ] <EOL> return [ '<STR_LIT>' , dev ] <EOL> def _parse_remove_command ( round_index , command_index , command ) : <EOL> if len ( command ) != <NUM_LIT:2> : <EOL> raise ParseCommandError ( '<STR_LIT>' , round_index , command_index , <EOL> "<STR_LIT>" % <EOL> ( command , ) ) <EOL> dev_str = command [ <NUM_LIT:1> ] <EOL> try : <EOL> dev_id = int ( dev_str ) <EOL> except ValueError as err : <EOL> raise ParseCommandError ( '<STR_LIT>' , <EOL> round_index , command_index , err ) <EOL> return [ '<STR_LIT>' , dev_id ] <EOL> def _parse_set_weight_command ( round_index , command_index , command ) : <EOL> if len ( command ) != <NUM_LIT:3> : <EOL> raise ParseCommandError ( '<STR_LIT>' , round_index , command_index , <EOL> "<STR_LIT>" % <EOL> ( command , ) ) <EOL> dev_str = command [ <NUM_LIT:1> ] <EOL> weight_str = command [ <NUM_LIT:2> ] <EOL> try : <EOL> dev_id = int ( dev_str ) <EOL> except ValueError as err : <EOL> raise ParseCommandError ( '<STR_LIT>' , <EOL> round_index , command_index , err ) <EOL> weight = _parse_weight ( round_index , command_index , weight_str ) <EOL> return [ '<STR_LIT>' , dev_id , weight ] <EOL> def _parse_save_command ( round_index , command_index , command ) : <EOL> if len ( command ) != <NUM_LIT:2> : <EOL> raise ParseCommandError ( <EOL> command , round_index , command_index , <EOL> "<STR_LIT>" % ( command , ) ) <EOL> return [ '<STR_LIT>' , command [ <NUM_LIT:1> ] ] <EOL> def parse_scenario ( scenario_data ) : <EOL> """<STR_LIT>""" <EOL> parsed_scenario = { } <EOL> try : <EOL> raw_scenario = json . loads ( scenario_data ) <EOL> except ValueError as err : <EOL> raise ValueError ( "<STR_LIT>" % err ) <EOL> if not isinstance ( raw_scenario , dict ) : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> if '<STR_LIT>' not in raw_scenario : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> try : <EOL> parsed_scenario [ '<STR_LIT>' ] = int ( raw_scenario [ '<STR_LIT>' ] ) <EOL> except ValueError as err : <EOL> raise ValueError ( "<STR_LIT>" % err ) <EOL> if not <NUM_LIT:1> <= parsed_scenario [ '<STR_LIT>' ] <= <NUM_LIT:32> : <EOL> raise ValueError ( "<STR_LIT>" <EOL> % raw_scenario [ '<STR_LIT>' ] ) <EOL> if '<STR_LIT>' not in raw_scenario : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> try : <EOL> parsed_scenario [ '<STR_LIT>' ] = float ( raw_scenario [ '<STR_LIT>' ] ) <EOL> except ValueError as err : <EOL> raise ValueError ( "<STR_LIT>" % err ) <EOL> if parsed_scenario [ '<STR_LIT>' ] < <NUM_LIT:1> : <EOL> raise ValueError ( "<STR_LIT>" <EOL> % parsed_scenario [ '<STR_LIT>' ] ) <EOL> if '<STR_LIT>' not in raw_scenario : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> try : <EOL> parsed_scenario [ '<STR_LIT>' ] = float ( raw_scenario [ '<STR_LIT>' ] ) <EOL> except ValueError as err : <EOL> raise ValueError ( "<STR_LIT>" % err ) <EOL> if parsed_scenario [ '<STR_LIT>' ] < <NUM_LIT:0> : <EOL> raise ValueError ( "<STR_LIT>" <EOL> % parsed_scenario [ '<STR_LIT>' ] ) <EOL> if '<STR_LIT>' not in raw_scenario : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> try : <EOL> parsed_scenario [ '<STR_LIT>' ] = int ( raw_scenario [ '<STR_LIT>' ] ) <EOL> except ValueError as err : <EOL> raise ValueError ( "<STR_LIT>" % err ) <EOL> if '<STR_LIT>' not in raw_scenario : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> if not isinstance ( raw_scenario [ '<STR_LIT>' ] , list ) : <EOL> raise ValueError ( "<STR_LIT>" ) <EOL> parser_for_command = { <EOL> '<STR_LIT>' : _parse_add_command , <EOL> '<STR_LIT>' : _parse_remove_command , <EOL> '<STR_LIT>' : _parse_set_weight_command , <EOL> '<STR_LIT>' : _parse_save_command , <EOL> } <EOL> parsed_scenario [ '<STR_LIT>' ] = [ ] <EOL> for round_index , raw_round in enumerate ( raw_scenario [ '<STR_LIT>' ] ) : <EOL> if not isinstance ( raw_round , list ) : <EOL> raise ValueError ( "<STR_LIT>" % round_index ) <EOL> parsed_round = [ ] <EOL> for command_index , command in enumerate ( raw_round ) : <EOL> if command [ <NUM_LIT:0> ] not in parser_for_command : <EOL> raise ValueError ( <EOL> "<STR_LIT>" <EOL> "<STR_LIT>" % <EOL> ( round_index , command_index , command [ <NUM_LIT:0> ] , <EOL> parser_for_command . keys ( ) ) ) <EOL> parsed_round . append ( <EOL> parser_for_command [ command [ <NUM_LIT:0> ] ] ( <EOL> round_index , command_index , command ) ) <EOL> parsed_scenario [ '<STR_LIT>' ] . append ( parsed_round ) <EOL> return parsed_scenario <EOL> def run_scenario ( scenario ) : <EOL> """<STR_LIT>""" <EOL> seed = scenario [ '<STR_LIT>' ] <EOL> rb = builder . RingBuilder ( scenario [ '<STR_LIT>' ] , scenario [ '<STR_LIT>' ] , <NUM_LIT:1> ) <EOL> rb . set_overload ( scenario [ '<STR_LIT>' ] ) <EOL> command_map = { <EOL> '<STR_LIT>' : rb . add_dev , <EOL> '<STR_LIT>' : rb . remove_dev , <EOL> '<STR_LIT>' : rb . set_dev_weight , <EOL> '<STR_LIT>' : rb . save , <EOL> } <EOL> for round_index , commands in enumerate ( scenario [ '<STR_LIT>' ] ) : <EOL> print "<STR_LIT>" % ( round_index + <NUM_LIT:1> ) <EOL> for command in commands : <EOL> key = command . pop ( <NUM_LIT:0> ) <EOL> try : <EOL> command_f = command_map [ key ] <EOL> except KeyError : <EOL> raise ValueError ( "<STR_LIT>" % key ) <EOL> command_f ( * command ) <EOL> rebalance_number = <NUM_LIT:1> <EOL> parts_moved , old_balance , removed_devs = rb . rebalance ( seed = seed ) <EOL> rb . pretend_min_part_hours_passed ( ) <EOL> print "<STR_LIT>" % ( <EOL> parts_moved , old_balance , removed_devs ) <EOL> while True : <EOL> rebalance_number += <NUM_LIT:1> <EOL> parts_moved , new_balance , removed_devs = rb . rebalance ( seed = seed ) <EOL> rb . pretend_min_part_hours_passed ( ) <EOL> print "<STR_LIT>" % ( <EOL> rebalance_number , parts_moved , new_balance , removed_devs ) <EOL> if parts_moved == <NUM_LIT:0> and removed_devs == <NUM_LIT:0> : <EOL> break <EOL> if abs ( new_balance - old_balance ) < <NUM_LIT:1> and not ( <EOL> old_balance == builder . MAX_BALANCE and <EOL> new_balance == builder . MAX_BALANCE ) : <EOL> break <EOL> old_balance = new_balance <EOL> def main ( argv = None ) : <EOL> args = ARG_PARSER . parse_args ( argv ) <EOL> try : <EOL> with open ( args . scenario_path ) as sfh : <EOL> scenario_data = sfh . read ( ) <EOL> except OSError as err : <EOL> sys . stderr . write ( "<STR_LIT>" % <EOL> ( args . scenario_path , err ) ) <EOL> return <NUM_LIT:1> <EOL> try : <EOL> scenario = parse_scenario ( scenario_data ) <EOL> except ValueError as err : <EOL> sys . stderr . write ( "<STR_LIT>" % <EOL> ( args . scenario_path , err ) ) <EOL> return <NUM_LIT:1> <EOL> if not args . check : <EOL> run_scenario ( scenario ) <EOL> return <NUM_LIT:0> </s>
