<s> from concurrent import futures <EOL> from threading import Thread , Event <EOL> from . stream import StreamIO <EOL> from . . buffers import RingBuffer <EOL> from . . compat import queue <EOL> class SegmentedStreamWorker ( Thread ) : <EOL> """<STR_LIT>""" <EOL> def __init__ ( self , reader ) : <EOL> self . closed = False <EOL> self . reader = reader <EOL> self . writer = reader . writer <EOL> self . stream = reader . stream <EOL> self . session = reader . stream . session <EOL> self . logger = reader . logger <EOL> self . _wait = None <EOL> Thread . __init__ ( self ) <EOL> self . daemon = True <EOL> def close ( self ) : <EOL> """<STR_LIT>""" <EOL> if not self . closed : <EOL> self . logger . debug ( "<STR_LIT>" ) <EOL> self . closed = True <EOL> if self . _wait : <EOL> self . _wait . set ( ) <EOL> def wait ( self , time ) : <EOL> """<STR_LIT>""" <EOL> self . _wait = Event ( ) <EOL> return not self . _wait . wait ( time ) <EOL> def iter_segments ( self ) : <EOL> """<STR_LIT>""" <EOL> return <EOL> yield <EOL> def run ( self ) : <EOL> for segment in self . iter_segments ( ) : <EOL> self . writer . put ( segment ) <EOL> self . writer . put ( None ) <EOL> self . close ( ) <EOL> class SegmentedStreamWriter ( Thread ) : <EOL> """<STR_LIT>""" <EOL> def __init__ ( self , reader , size = <NUM_LIT:20> , retries = None , threads = None , timeout = None ) : <EOL> self . closed = False <EOL> self . reader = reader <EOL> self . stream = reader . stream <EOL> self . session = reader . stream . session <EOL> self . logger = reader . logger <EOL> if not retries : <EOL> retries = self . session . options . get ( "<STR_LIT>" ) <EOL> if not threads : <EOL> threads = self . session . options . get ( "<STR_LIT>" ) <EOL> if not timeout : <EOL> timeout = self . session . options . get ( "<STR_LIT>" ) <EOL> self . retries = retries <EOL> self . timeout = timeout <EOL> self . executor = futures . ThreadPoolExecutor ( max_workers = threads ) <EOL> self . futures = queue . Queue ( size ) <EOL> Thread . __init__ ( self ) <EOL> self . daemon = True <EOL> def close ( self ) : <EOL> """<STR_LIT>""" <EOL> if not self . closed : <EOL> self . logger . debug ( "<STR_LIT>" ) <EOL> self . closed = True <EOL> self . reader . buffer . close ( ) <EOL> self . executor . shutdown ( wait = True ) <EOL> def put ( self , segment ) : <EOL> """<STR_LIT>""" <EOL> if self . closed : <EOL> return <EOL> if segment is not None : <EOL> future = self . executor . submit ( self . fetch , segment , <EOL> retries = self . retries ) <EOL> else : <EOL> future = None <EOL> self . queue ( self . futures , ( segment , future ) ) <EOL> def queue ( self , queue_ , value ) : <EOL> """<STR_LIT>""" <EOL> while not self . closed : <EOL> try : <EOL> queue_ . put ( value , block = True , timeout = <NUM_LIT:1> ) <EOL> break <EOL> except queue . Full : <EOL> continue <EOL> def fetch ( self , segment ) : <EOL> """<STR_LIT>""" <EOL> pass <EOL> def write ( self , segment , result ) : <EOL> """<STR_LIT>""" <EOL> pass <EOL> def run ( self ) : <EOL> while not self . closed : <EOL> try : <EOL> segment , future = self . futures . get ( block = True , timeout = <NUM_LIT:0.5> ) <EOL> except queue . Empty : <EOL> continue <EOL> if future is None : <EOL> break <EOL> while not self . closed : <EOL> try : <EOL> result = future . result ( timeout = <NUM_LIT:0.5> ) <EOL> except futures . TimeoutError : <EOL> continue <EOL> except futures . CancelledError : <EOL> break <EOL> if result is not None : <EOL> self . write ( segment , result ) <EOL> break <EOL> self . close ( ) <EOL> class SegmentedStreamReader ( StreamIO ) : <EOL> __worker__ = SegmentedStreamWorker <EOL> __writer__ = SegmentedStreamWriter <EOL> def __init__ ( self , stream , timeout = None ) : <EOL> StreamIO . __init__ ( self ) <EOL> self . session = stream . session <EOL> self . stream = stream <EOL> if not timeout : <EOL> timeout = self . session . options . get ( "<STR_LIT>" ) <EOL> self . timeout = timeout <EOL> def open ( self ) : <EOL> buffer_size = self . session . get_option ( "<STR_LIT>" ) <EOL> self . buffer = RingBuffer ( buffer_size ) <EOL> self . writer = self . __writer__ ( self ) <EOL> self . worker = self . __worker__ ( self ) <EOL> self . writer . start ( ) <EOL> self . worker . start ( ) <EOL> def close ( self ) : <EOL> self . worker . close ( ) <EOL> self . writer . close ( ) <EOL> for thread in ( self . worker , self . writer ) : <EOL> if thread . is_alive ( ) : <EOL> thread . join ( ) <EOL> self . buffer . close ( ) <EOL> def read ( self , size ) : <EOL> if not self . buffer : <EOL> return b"<STR_LIT>" <EOL> return self . buffer . read ( size , block = self . writer . is_alive ( ) , <EOL> timeout = self . timeout ) </s>
