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1 # -*- Mode: Python; test-case-name: flumotion.test.test_common_signals -*- 2 # vi:si:et:sw=4:sts=4:ts=4 3 # 4 # Flumotion - a streaming media server 5 # Copyright (C) 2007 Fluendo, S.L. (www.fluendo.com). 6 # All rights reserved. 7 8 # This file may be distributed and/or modified under the terms of 9 # the GNU General Public License version 2 as published by 10 # the Free Software Foundation. 11 # This file is distributed without any warranty; without even the implied 12 # warranty of merchantability or fitness for a particular purpose. 13 # See "LICENSE.GPL" in the source distribution for more information. 14 15 # Licensees having purchased or holding a valid Flumotion Advanced 16 # Streaming Server license may use this file in accordance with the 17 # Flumotion Advanced Streaming Server Commercial License Agreement. 18 # See "LICENSE.Flumotion" in the source distribution for more information. 19 20 # Headers in this file shall remain intact. 21 22 """synchronous message passing between python objects 23 """ 24 25 import warnings 26 27 from flumotion.common import log 28 29 __version__ = "$Rev: 7162 $" 30 3133 __signals__ = () 34 35 __signalConnections = None 36 __signalId = 0 37 419643 self.__ensureSignals() 44 45 if signalName not in self.__signals__: 46 raise ValueError('Unknown signal for object of type %r: %s' 47 % (type(self), signalName)) 48 49 sid = self.__signalId 50 self.__signalConnections[sid] = (signalName, proc, args, kwargs) 51 self.__signalId += 1 52 return sid5355 self.__ensureSignals() 56 57 if signalId not in self.__signalConnections: 58 raise ValueError('Unknown signal ID: %s' % (signalId, )) 59 60 del self.__signalConnections[signalId]61 62 # F0.8 6365 warnings.warn("Please call disconnectByFunction instead", 66 DeprecationWarning, stacklevel=2) 67 self.disconnectByFunction(func)6870 self.__ensureSignals() 71 72 for signalId, conn in self.__signalConnections.items(): 73 name, proc, args, kwargs = conn 74 if proc == function: 75 break 76 else: 77 raise ValueError( 78 'No signal connected to function: %r' % (function, )) 79 80 del self.__signalConnections[signalId]8183 self.__ensureSignals() 84 if signalName not in self.__signals__: 85 raise ValueError('Emitting unknown signal %s' % signalName) 86 87 connections = self.__signalConnections 88 for name, proc, pargs, pkwargs in connections.values(): 89 if name == signalName: 90 try: 91 proc(self, *(args + pargs), **pkwargs) 92 except Exception, e: 93 log.warning("signalmixin", "Exception calling " 94 "signal handler %r: %s", proc, 95 log.getExceptionMessage(e))
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