<s> import threading <EOL> from theory . model . mpdhelper import * <EOL> def threadsafe_function ( fn ) : <EOL> """<STR_LIT>""" <EOL> lock = threading . Lock ( ) <EOL> def new ( * args , ** kwargs ) : <EOL> lock . acquire ( ) <EOL> try : <EOL> r = fn ( * args , ** kwargs ) <EOL> except Exception as e : <EOL> log . debug ( '<STR_LIT>' % e ) <EOL> raise NoMPDConnection <EOL> finally : <EOL> lock . release ( ) <EOL> return r <EOL> return new <EOL> class NoMPDConnection ( Exception ) : <EOL> pass <EOL> class MPDPool : <EOL> max_connections = <NUM_LIT:3> <EOL> max_overflow = <NUM_LIT:2> <EOL> in_use = { } <EOL> connections = { } <EOL> overflow_connections = { } <EOL> overflow_in_use = { } <EOL> def __init__ ( self , g ) : <EOL> self . factory = mpdhelper <EOL> self . g = g <EOL> @ threadsafe_function <EOL> def recreate ( self ) : <EOL> for conn in self . connections : <EOL> try : <EOL> self . connections [ conn ] . disconnect ( ) <EOL> except NoMPDConnection : <EOL> pass <EOL> for conn in self . overflow_connections : <EOL> try : <EOL> self . overflow_connections [ conn ] . disconnect ( ) <EOL> except NoMPDConnection : <EOL> pass <EOL> self . in_use = { } <EOL> self . overflow_in_use = { } <EOL> @ threadsafe_function <EOL> def connect ( self ) : <EOL> log . debug ( '<STR_LIT>' % ( self . connections , self . in_use ) ) <EOL> for id , instance in self . connections . items ( ) : <EOL> if id in self . in_use : <EOL> log . debug ( '<STR_LIT>' % id ) <EOL> continue <EOL> return self . got_conn ( instance , id ) <EOL> log . debug ( '<STR_LIT>' ) <EOL> for id in range ( self . max_connections ) : <EOL> log . debug ( '<STR_LIT>' % id ) <EOL> if id in self . connections : <EOL> continue <EOL> else : <EOL> log . debug ( '<STR_LIT>' % id ) <EOL> mpdc = self . factory ( self . g ) <EOL> d = mpdc . connect ( ) <EOL> return self . got_conn ( d , id ) <EOL> for id , instance in self . overflow_connections . items ( ) : <EOL> if id in self . overflow_in_use : <EOL> log . debug ( '<STR_LIT>' % id ) <EOL> continue <EOL> return self . got_conn ( instance , id , overflow = True ) <EOL> for id in range ( self . max_overflow ) : <EOL> if id in self . overflow_connections : <EOL> continue <EOL> else : <EOL> log . debug ( '<STR_LIT>' % id ) <EOL> mpdc = self . factory ( self . g ) <EOL> d = mpdc . connect ( ) <EOL> return self . got_conn ( d , id , overflow = True ) <EOL> raise MaxConnections <EOL> def __getattr__ ( self , attr ) : <EOL> return getattr ( self . mpdc , attr ) <EOL> def got_conn ( self , obj , id , overflow = False ) : <EOL> log . debug ( '<STR_LIT>' % id ) <EOL> if not overflow : <EOL> self . connections [ id ] = obj <EOL> self . in_use [ id ] = True <EOL> else : <EOL> self . overflow_connections [ id ] = obj <EOL> self . overflow_in_use [ id ] = True <EOL> obj . add_callback ( self . disconnect , id , overflow ) <EOL> print self . in_use <EOL> i = sum ( filter ( lambda x : x , self . in_use . values ( ) ) ) <EOL> log . debug ( '<STR_LIT>' % ( i , self . max_connections ) ) <EOL> return obj <EOL> def disconnect ( self , id , overflow ) : <EOL> log . debug ( '<STR_LIT>' ) <EOL> del self . in_use [ id ] <EOL> log . debug ( '<STR_LIT>' % ( self . connections , self . in_use ) ) <EOL> class ConnectionClosed ( Exception ) : <EOL> pass <EOL> class ProtocolError ( Exception ) : <EOL> pass <EOL> class IncorrectPassword ( Exception ) : <EOL> pass <EOL> class MaxConenctions ( Exception ) : <EOL> pass </s>
