<s> from time import asctime <EOL> import logging <EOL> from argparse import ArgumentParser <EOL> from frontera . utils . misc import load_object <EOL> from frontera . core . manager import FrontierManager <EOL> from frontera . logger . handlers import CONSOLE <EOL> from twisted . internet . task import LoopingCall <EOL> from twisted . internet import reactor <EOL> from frontera . settings import Settings <EOL> from frontera . contrib . backends . remote . codecs . msgpack import Decoder , Encoder <EOL> logger = logging . getLogger ( "<STR_LIT>" ) <EOL> class StrategyWorker ( object ) : <EOL> def __init__ ( self , settings , strategy_class ) : <EOL> partition_id = settings . get ( '<STR_LIT>' ) <EOL> if partition_id is None or type ( partition_id ) != int : <EOL> raise AttributeError ( "<STR_LIT>" ) <EOL> messagebus = load_object ( settings . get ( '<STR_LIT>' ) ) <EOL> mb = messagebus ( settings ) <EOL> spider_log = mb . spider_log ( ) <EOL> scoring_log = mb . scoring_log ( ) <EOL> self . consumer = spider_log . consumer ( partition_id = partition_id , type = '<STR_LIT>' ) <EOL> self . scoring_log_producer = scoring_log . producer ( ) <EOL> self . _manager = FrontierManager . from_settings ( settings , strategy_worker = True ) <EOL> self . _decoder = Decoder ( self . _manager . request_model , self . _manager . response_model ) <EOL> self . _encoder = Encoder ( self . _manager . request_model ) <EOL> self . consumer_batch_size = settings . get ( '<STR_LIT>' ) <EOL> self . strategy = strategy_class . from_worker ( settings ) <EOL> self . states = self . _manager . backend . states <EOL> self . stats = { } <EOL> self . cache_flush_counter = <NUM_LIT:0> <EOL> self . job_id = <NUM_LIT:0> <EOL> self . task = LoopingCall ( self . work ) <EOL> def work ( self ) : <EOL> consumed = <NUM_LIT:0> <EOL> batch = [ ] <EOL> fingerprints = set ( ) <EOL> for m in self . consumer . get_messages ( count = self . consumer_batch_size , timeout = <NUM_LIT:1.0> ) : <EOL> try : <EOL> msg = self . _decoder . decode ( m ) <EOL> except ( KeyError , TypeError ) , e : <EOL> logger . error ( "<STR_LIT>" , e ) <EOL> continue <EOL> else : <EOL> type = msg [ <NUM_LIT:0> ] <EOL> batch . append ( msg ) <EOL> if type == '<STR_LIT>' : <EOL> _ , seeds = msg <EOL> fingerprints . update ( map ( lambda x : x . meta [ '<STR_LIT>' ] , seeds ) ) <EOL> continue <EOL> if type == '<STR_LIT>' : <EOL> _ , response , links = msg <EOL> fingerprints . add ( response . meta [ '<STR_LIT>' ] ) <EOL> fingerprints . update ( map ( lambda x : x . meta [ '<STR_LIT>' ] , links ) ) <EOL> continue <EOL> if type == '<STR_LIT>' : <EOL> _ , request , error = msg <EOL> fingerprints . add ( request . meta [ '<STR_LIT>' ] ) <EOL> continue <EOL> if type == '<STR_LIT>' : <EOL> continue <EOL> raise TypeError ( '<STR_LIT>' % type ) <EOL> finally : <EOL> consumed += <NUM_LIT:1> <EOL> self . states . fetch ( fingerprints ) <EOL> fingerprints . clear ( ) <EOL> results = [ ] <EOL> for msg in batch : <EOL> if len ( results ) > <NUM_LIT> : <EOL> self . scoring_log_producer . send ( None , * results ) <EOL> results = [ ] <EOL> type = msg [ <NUM_LIT:0> ] <EOL> if type == '<STR_LIT>' : <EOL> _ , seeds = msg <EOL> for seed in seeds : <EOL> seed . meta [ '<STR_LIT>' ] = self . job_id <EOL> results . extend ( self . on_add_seeds ( seeds ) ) <EOL> continue <EOL> if type == '<STR_LIT>' : <EOL> _ , response , links = msg <EOL> if response . meta [ '<STR_LIT>' ] != self . job_id : <EOL> continue <EOL> results . extend ( self . on_page_crawled ( response , links ) ) <EOL> continue <EOL> if type == '<STR_LIT>' : <EOL> _ , request , error = msg <EOL> if request . meta [ '<STR_LIT>' ] != self . job_id : <EOL> continue <EOL> results . extend ( self . on_request_error ( request , error ) ) <EOL> continue <EOL> if len ( results ) : <EOL> self . scoring_log_producer . send ( None , * results ) <EOL> if self . cache_flush_counter == <NUM_LIT:30> : <EOL> logger . info ( "<STR_LIT>" ) <EOL> self . states . flush ( force_clear = False ) <EOL> logger . info ( "<STR_LIT>" ) <EOL> self . cache_flush_counter = <NUM_LIT:0> <EOL> self . cache_flush_counter += <NUM_LIT:1> <EOL> if self . strategy . finished ( ) : <EOL> logger . info ( "<STR_LIT>" ) <EOL> exit ( <NUM_LIT:0> ) <EOL> logger . info ( "<STR_LIT>" , consumed ) <EOL> self . stats [ '<STR_LIT>' ] = consumed <EOL> self . stats [ '<STR_LIT>' ] = asctime ( ) <EOL> def run ( self ) : <EOL> self . task . start ( interval = <NUM_LIT:0> ) <EOL> reactor . addSystemEventTrigger ( '<STR_LIT>' , '<STR_LIT>' , self . stop ) <EOL> reactor . run ( ) <EOL> def stop ( self ) : <EOL> logger . info ( "<STR_LIT>" ) <EOL> self . strategy . close ( ) <EOL> logger . info ( "<STR_LIT>" ) <EOL> self . _manager . stop ( ) <EOL> def on_add_seeds ( self , seeds ) : <EOL> logger . info ( '<STR_LIT>' , len ( seeds ) ) <EOL> seed_map = dict ( map ( lambda seed : ( seed . meta [ '<STR_LIT>' ] , seed ) , seeds ) ) <EOL> self . states . set_states ( seeds ) <EOL> scores = self . strategy . add_seeds ( seeds ) <EOL> self . states . update_cache ( seeds ) <EOL> output = [ ] <EOL> for fingerprint , score in scores . iteritems ( ) : <EOL> seed = seed_map [ fingerprint ] <EOL> logger . debug ( '<STR_LIT>' , seed . url ) <EOL> if score is not None : <EOL> encoded = self . _encoder . encode_update_score ( <EOL> seed . meta [ '<STR_LIT>' ] , <EOL> score , <EOL> seed . url , <EOL> True <EOL> ) <EOL> output . append ( encoded ) <EOL> return output <EOL> def on_page_crawled ( self , response , links ) : <EOL> logger . debug ( "<STR_LIT>" , response . url ) <EOL> objs_list = [ response ] <EOL> objs_list . extend ( links ) <EOL> objs = dict ( map ( lambda obj : ( obj . meta [ '<STR_LIT>' ] , obj ) , objs_list ) ) <EOL> self . states . set_states ( objs_list ) <EOL> scores = self . strategy . page_crawled ( response , links ) <EOL> self . states . update_cache ( objs_list ) <EOL> output = [ ] <EOL> for fingerprint , score in scores . iteritems ( ) : <EOL> obj = objs [ fingerprint ] <EOL> if score is not None : <EOL> encoded = self . _encoder . encode_update_score ( <EOL> obj . meta [ '<STR_LIT>' ] , <EOL> score , <EOL> obj . url , <EOL> True <EOL> ) <EOL> output . append ( encoded ) <EOL> return output <EOL> def on_request_error ( self , request , error ) : <EOL> self . states . set_states ( request ) <EOL> scores = self . strategy . page_error ( request , error ) <EOL> self . states . update_cache ( request ) <EOL> assert len ( scores ) == <NUM_LIT:1> <EOL> fingerprint , score = scores . popitem ( ) <EOL> if score is not None : <EOL> encoded = self . _encoder . encode_update_score ( <EOL> request . meta [ '<STR_LIT>' ] , <EOL> score , <EOL> request . url , <EOL> False <EOL> ) <EOL> return [ encoded ] <EOL> return [ ] <EOL> if __name__ == '<STR_LIT:__main__>' : <EOL> parser = ArgumentParser ( description = "<STR_LIT>" ) <EOL> parser . add_argument ( '<STR_LIT>' , type = str , required = True , <EOL> help = '<STR_LIT>' ) <EOL> parser . add_argument ( '<STR_LIT>' , '<STR_LIT>' , type = str , default = '<STR_LIT>' , <EOL> help = "<STR_LIT>" ) <EOL> parser . add_argument ( '<STR_LIT>' , type = str , <EOL> help = '<STR_LIT>' ) <EOL> args = parser . parse_args ( ) <EOL> logger . setLevel ( args . log_level ) <EOL> logger . addHandler ( CONSOLE ) <EOL> settings = Settings ( module = args . config ) <EOL> strategy_classpath = args . strategy if args . strategy else settings . get ( '<STR_LIT>' ) <EOL> if not strategy_classpath : <EOL> raise ValueError ( "<STR_LIT>" <EOL> "<STR_LIT>" ) <EOL> strategy_class = load_object ( strategy_classpath ) <EOL> worker = StrategyWorker ( settings , strategy_class ) <EOL> worker . run ( ) </s>
