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1 # -*- Mode: Python; test-case-name: flumotion.test.test_worker_feed -*- 2 # vi:si:et:sw=4:sts=4:ts=4 3 4 # Flumotion - a streaming media server 5 # Copyright (C) 2004,2005,2006,2007,2008,2009 Fluendo, S.L. 6 # Copyright (C) 2010,2011 Flumotion Services, S.A. 7 # All rights reserved. 8 # 9 # This file may be distributed and/or modified under the terms of 10 # the GNU Lesser General Public License version 2.1 as published by 11 # the Free Software Foundation. 12 # This file is distributed without any warranty; without even the implied 13 # warranty of merchantability or fitness for a particular purpose. 14 # See "LICENSE.LGPL" in the source distribution for more information. 15 # 16 # Headers in this file shall remain intact. 17 18 """ 19 implementation of a PB Server through which other components can request 20 to eat from or feed to this worker's components. 21 """ 22 23 from twisted.internet import reactor 24 from twisted.spread import pb 25 from twisted.cred import portal 26 from zope.interface import implements 27 28 from flumotion.common import log, common 29 from flumotion.twisted import fdserver 30 from flumotion.twisted import portal as fportal 31 from flumotion.twisted import pb as fpb 32 33 __version__ = "$Rev$" 34 3537 """ 38 I am the feed server. PHEAR 39 """ 40 41 implements(portal.IRealm) 42 43 logCategory = 'dispatcher' 4493 9446 """ 47 @param brain: L{flumotion.worker.worker.WorkerBrain} 48 """ 49 self._brain = brain 50 self._tport = None 51 self.listen(bouncer, portNum)5254 if not self._tport: 55 self.warning('not listening!') 56 return 0 57 return self._tport.getHost().port5860 portal = fportal.BouncerPortal(self, bouncer) 61 factory = pb.PBServerFactory(portal, 62 unsafeTracebacks=unsafeTracebacks) 63 64 tport = reactor.listenWith(fdserver.PassableServerPort, portNum, 65 factory) 66 67 self._tport = tport 68 self.debug('Listening for feed requests on TCP port %d', 69 self.getPortNum())70 75 76 ### IRealm method 7779 avatar = FeedAvatar(self, avatarId, mind) 80 return (pb.IPerspective, avatar, 81 lambda: self.avatarLogout(avatar))82 85 86 ## proxy these to the brain 87 9096 """ 97 I am an avatar in a FeedServer for components that log in and request 98 to eat from or feed to one of my components. 99 100 My mind is a reference to a L{flumotion.component.feed.FeedMedium} 101 """ 102 logCategory = "feedavatar" 103 remoteLogName = "feedmedium" 104176106 """ 107 """ 108 fpb.Avatar.__init__(self, avatarId) 109 self._transport = None 110 self.feedServer = feedServer 111 self.avatarId = avatarId 112 self.setMind(mind)113115 """ 116 Called when the PB client wants us to send them the given feed. 117 """ 118 # the PB message needs to be sent from the side that has the feeder 119 # for proper switching, so we call back as a reply 120 d = self.mindCallRemote('sendFeedReply', fullFeedId) 121 d.addCallback(self._sendFeedReplyCb, fullFeedId)122124 # compare with startStreaming in prototype 125 # Remove this from the reactor; we mustn't read or write from it from 126 # here on 127 t = self.mind.broker.transport 128 t.stopReading() 129 t.stopWriting() 130 131 # hand off the fd to the component 132 self.debug("Attempting to send FD: %d", t.fileno()) 133 134 (flowName, componentName, feedName) = common.parseFullFeedId( 135 fullFeedId) 136 componentId = common.componentId(flowName, componentName) 137 138 if self.feedServer.feedToFD(componentId, feedName, t.fileno(), 139 self.avatarId): 140 t.keepSocketAlive = True 141 142 # We removed the transport from the reactor before sending the 143 # FD; now we want the socket cleaned up. 144 t.loseConnection()145147 """ 148 Called when the PB client wants to send the given feedId to the 149 given component 150 """ 151 # we need to make sure our result goes back, so only stop reading 152 t = self.mind.broker.transport 153 t.stopReading() 154 reactor.callLater(0, self._doReceiveFeed, fullFeedId)155157 t = self.mind.broker.transport 158 159 self.debug('flushing PB write queue') 160 t.doWrite() 161 self.debug('stop writing to transport') 162 t.stopWriting() 163 164 # hand off the fd to the component 165 self.debug("Attempting to send FD: %d", t.fileno()) 166 167 (flowName, componentName, eaterAlias) = common.parseFullFeedId( 168 fullFeedId) 169 componentId = common.componentId(flowName, componentName) 170 171 if self.feedServer.eatFromFD(componentId, eaterAlias, t.fileno(), 172 self.avatarId): 173 t.keepSocketAlive = True 174 175 t.loseConnection()
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