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# This file is part of Buildbot.  Buildbot is free software: you can 

# redistribute it and/or modify it under the terms of the GNU General Public 

# License as published by the Free Software Foundation, version 2. 

# 

# This program is distributed in the hope that it will be useful, but WITHOUT 

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 

# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more 

# details. 

# 

# You should have received a copy of the GNU General Public License along with 

# this program; if not, write to the Free Software Foundation, Inc., 51 

# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 

# 

# Copyright Buildbot Team Members 

 

from twisted.spread import pb 

from twisted.python import log 

from twisted.spread.interfaces import IJellyable 

 

def patch(): 

    log.msg("Applying patch for http://twistedmatrix.com/trac/ticket/5079") 

    if not hasattr(pb, '_JellyableAvatarMixin'): 

        log.msg("..patch not applicable; please file a bug at buildbot.net") 

    else: 

        pb._JellyableAvatarMixin._cbLogin = _fixed_cbLogin 

 

def _fixed_cbLogin(self, (interface, avatar, logout)): 

    """ 

    Ensure that the avatar to be returned to the client is jellyable and 

    set up disconnection notification to call the realm's logout object. 

    """ 

    if not IJellyable.providedBy(avatar): 

        avatar = pb.AsReferenceable(avatar, "perspective") 

 

    puid = avatar.processUniqueID() 

 

    # only call logout once, whether the connection is dropped (disconnect) 

    # or a logout occurs (cleanup), and be careful to drop the reference to 

    # it in either case 

    logout = [ logout ] 

    def maybeLogout(): 

        if not logout: return 

        fn = logout[0] 

        del logout[0] 

        fn() 

    self.broker._localCleanup[puid] = maybeLogout 

    self.broker.notifyOnDisconnect(maybeLogout) 

 

    return avatar