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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.python import failure, log
class SubscriptionPoint(object):
def __init__(self, name):
self.name = name
self.subscriptions = set()
def __str__(self):
return "<SubscriptionPoint '%s'>" % self.name
def subscribe(self, callback):
sub = Subscription(self, callback)
self.subscriptions.add(sub)
return sub
def deliver(self, *args, **kwargs):
for sub in list(self.subscriptions):
try:
sub.callback(*args, **kwargs)
except:
log.err(failure.Failure(),
'while invoking callback %s to %s' % (sub.callback, self))
def _unsubscribe(self, subscription):
self.subscriptions.remove(subscription)
class Subscription(object):
def __init__(self, subpt, callback):
self.subpt = subpt
self.callback = callback
def unsubscribe(self):
self.subpt._unsubscribe(self)
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