Revision 4a2351a5 src/listener.py
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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from threading import Lock |
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class Subject: |
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'Thread-safe abstact class for event-dispatching subjects' |
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def __init__(self, listeners=[]): |
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self._listeners = listeners |
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self._lock = Lock() |
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def has_listener(self, listener): |
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return (listener in self._listeners) |
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with self._lock: |
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return (listener in self._listeners) |
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def add_listener(self, listener): |
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with self._lock: |
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self._listeners.append(listener) |
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def remove_listener(self, listener): |
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self._listeners.remove(listener) |
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with self._lock: |
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try: |
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self._listeners.remove(listener) |
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except ValueError: |
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pass |
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def dispatch(self, event, *args, **kwds): |
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try: |
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func = getattr(Listener, event) |
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for l in listeners: |
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func(l, data) |
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with self._lock: |
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for l in listeners: |
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func(l, *args, **kwds) |
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except AttributeError: |
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pass |
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class Listener: |
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"""Abstract class for NETCONF protocol message listeners, defining 2 events: |
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- reply |
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- error |
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""" |
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@override |
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def reply(self, *args, **kwds): |
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raise NotImplementedError |
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