root / ncclient / glue.py @ 4f748648
History | View | Annotate | Download (2.3 kB)
1 |
# Copyright 2009 Shikhar Bhushan
|
---|---|
2 |
#
|
3 |
# Licensed under the Apache License, Version 2.0 (the "License");
|
4 |
# you may not use this file except in compliance with the License.
|
5 |
# You may obtain a copy of the License at
|
6 |
#
|
7 |
# http://www.apache.org/licenses/LICENSE-2.0
|
8 |
#
|
9 |
# Unless required by applicable law or agreed to in writing, software
|
10 |
# distributed under the License is distributed on an "AS IS" BASIS,
|
11 |
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
12 |
# See the License for the specific language governing permissions and
|
13 |
# limitations under the License.
|
14 |
|
15 |
"TODO: docstring"
|
16 |
|
17 |
from cStringIO import StringIO |
18 |
from Queue import Queue |
19 |
from threading import Lock |
20 |
from xml.etree import cElementTree as ET |
21 |
|
22 |
|
23 |
def parse_root(raw): |
24 |
'''Parse the top-level element from a string representing an XML document.
|
25 |
|
26 |
Returns a `(tag, attributes)` tuple, where `tag` is a string representing
|
27 |
the qualified name of the root element and `attributes` is an
|
28 |
`{attribute: value}` dictionary.
|
29 |
'''
|
30 |
fp = StringIO(raw) |
31 |
for event, element in ET.iterparse(fp, events=('start',)): |
32 |
return (element.tag, element.attrib)
|
33 |
|
34 |
|
35 |
class Subject: |
36 |
|
37 |
def __init__(self): |
38 |
"TODO: docstring"
|
39 |
self._listeners = set([]) |
40 |
self._outQ = Queue()
|
41 |
self._lock = Lock()
|
42 |
|
43 |
def _dispatch_received(self, raw): |
44 |
"TODO: docstring"
|
45 |
root = parse_root(raw) |
46 |
with self._lock: |
47 |
listeners = list(self._listeners) |
48 |
for l in listeners: |
49 |
l.callback(root, raw) |
50 |
|
51 |
def _dispatch_error(self, err): |
52 |
"TODO: docstring"
|
53 |
with self._lock: |
54 |
listeners = list(self._listeners) |
55 |
for l in listeners: |
56 |
l.errback(err) |
57 |
|
58 |
def add_listener(self, listener): |
59 |
"TODO: docstring"
|
60 |
with self._lock: |
61 |
self._listeners.add(listener)
|
62 |
|
63 |
def remove_listener(self, listener): |
64 |
"TODO: docstring"
|
65 |
with self._lock: |
66 |
self._listeners.discard(listener)
|
67 |
|
68 |
def send(self, message): |
69 |
"TODO: docstring"
|
70 |
logger.debug('queueing:%s' % message)
|
71 |
self._outQ.put(message)
|
72 |
|
73 |
|
74 |
class Listener: |
75 |
|
76 |
"TODO: docstring"
|
77 |
|
78 |
def callback(self, root, raw): |
79 |
raise NotImplementedError |
80 |
|
81 |
def errback(self, err): |
82 |
raise NotImplementedError |