Revision 2bfd0fef
b/ncclient/glue.py | ||
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# Copyright 2009 Shikhar Bhushan |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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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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"TODO: docstring" |
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from cStringIO import StringIO |
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from Queue import Queue |
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from threading import Lock |
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from xml.etree import cElementTree as ET |
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def parse_root(raw): |
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'''Parse the top-level element from a string representing an XML document. |
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Returns a `(tag, attributes)` tuple, where `tag` is a string representing |
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the qualified name of the root element and `attributes` is an |
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`{attribute: value}` dictionary. |
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''' |
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fp = StringIO(raw) |
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for event, element in ET.iterparse(fp, events=('start',)): |
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return (element.tag, element.attrib) |
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class Subject: |
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def __init__(self): |
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"TODO: docstring" |
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self._listeners = set([]) |
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self._outQ = Queue() |
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self._lock = Lock() |
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def _dispatch_received(self, raw): |
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"TODO: docstring" |
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root = parse_root(raw) |
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with self._lock: |
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listeners = list(self._listeners) |
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for l in listeners: |
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l.deliver(root, raw) |
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def _dispatch_error(self, err): |
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"TODO: docstring" |
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with self._lock: |
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listeners = list(self._listeners) |
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for l in listeners: |
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l.errback(err) |
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def add_listener(self, listener): |
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"TODO: docstring" |
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with self._lock: |
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self._listeners.add(listener) |
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def remove_listener(self, listener): |
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"TODO: docstring" |
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with self._lock: |
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self._listeners.discard(listener) |
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def send(self, message): |
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"TODO: docstring" |
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logger.debug('queueing:%s' % message) |
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self._outQ.put(message) |
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class Listener: |
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def deliver(self, raw): |
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raise NotImplementedError |
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def errback(self, err): |
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raise NotImplementedError |
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