85 lines
1.9 KiB
Python
85 lines
1.9 KiB
Python
# standard python libs
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from logging import getLogger, CRITICAL, ERROR, WARNING, INFO, DEBUG
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import traceback
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# initialize logging
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logger = getLogger('utilities.events')
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log = logger.log
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class Event(object):
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""" an object containing data which will be passed out to all subscribers """
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def __init__(self):
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self.subscribers = []
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def subscribe(self, handler, *args, **kwargs):
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""" establish the subscribers (handlers) to this event """
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self.subscribers.append( ( handler, args, kwargs) )
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return self
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def unsubscribe(self, handler, *args, **kwargs):
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""" remove the subscriber (handler) to this event """
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try:
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self.subscribers.remove((handler, args, kwargs))
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except:
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raise ValueError("Handler is not subscribed to this event.")
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return self
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def notify(self, args):
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for instance, inner_args, kwargs in self.subscribers:
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try:
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instance(args, *inner_args, **kwargs)
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except Exception, error:
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traceback.print_exc()
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log(WARNING, "Error in event firing module")
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raise
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def getSubscriberCount(self):
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return len(self.subscribers)
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def clearSubscribers(self):
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self.subscribers.clear()
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return self
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def getSubscribers(self):
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return self.subscribers
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__iadd__ = subscribe
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__isub__ = unsubscribe
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__call__ = notify
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__len__ = getSubscriberCount
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"""
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Contributors can be viewed at:
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http://svn.secondlife.com/svn/linden/projects/2008/pyogp/CONTRIBUTORS.txt
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$LicenseInfo:firstyear=2008&license=apachev2$
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Copyright 2009, Linden Research, Inc.
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Licensed under the Apache License, Version 2.0 (the "License").
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You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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or in
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http://svn.secondlife.com/svn/linden/projects/2008/pyogp/LICENSE.txt
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$/LicenseInfo$
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"""
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