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40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
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"""Sender classes."""
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class _SENDER(type):
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"""Base metaclass for sender classes."""
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def __str__(cls):
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return '<Sender: %s>' % (cls.__name__, )
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class Any(object):
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"""Used to represent either 'any sender'.
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The Any class can be used with connect, disconnect, send, or
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sendExact to denote that the sender paramater should react to any
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sender, not just a particular sender.
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"""
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__metaclass__ = _SENDER
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class Anonymous(object):
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"""Singleton used to signal 'anonymous sender'.
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The Anonymous class is used to signal that the sender of a message
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is not specified (as distinct from being 'any sender').
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Registering callbacks for Anonymous will only receive messages
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sent without senders. Sending with anonymous will only send
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messages to those receivers registered for Any or Anonymous.
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Note: The default sender for connect is Any, while the default
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sender for send is Anonymous. This has the effect that if you do
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not specify any senders in either function then all messages are
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routed as though there was a single sender (Anonymous) being used
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everywhere.
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"""
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__metaclass__ = _SENDER
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