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# These imports are for python3 compatibility inside python2 |
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2
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from __future__ import absolute_import |
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3
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from __future__ import division |
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4
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from __future__ import print_function |
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5
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6
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import threading |
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7
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import cachetools |
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8
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9
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import apex.aprs.util |
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10
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11
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12
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class NonrepeatingBuffer(object): |
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13
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def __init__(self, base_tnc, base_name, base_port=None, buffer_size=10000, buffer_time=30): |
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14
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self.packet_cache = cachetools.TTLCache(buffer_size, buffer_time) |
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self.lock = threading.Lock() |
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self.base_tnc = base_tnc |
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self.base_port = base_port |
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self.base_name = base_name |
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20
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@property |
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21
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def port(self): |
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return self.base_port |
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@property |
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def name(self): |
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return self.base_name |
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28
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def connect(self, *args, **kwargs): |
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self.base_tnc.connect(*args, **kwargs) |
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30
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31
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def close(self, *args, **kwargs): |
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32
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self.base_tnc.close(*args, **kwargs) |
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33
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34
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def write(self, frame, *args, **kwargs): |
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35
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with self.lock: |
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36
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frame_hash = str(apex.aprs.util.hash_frame(frame)) |
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37
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if frame_hash not in self.packet_cache: |
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38
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self.packet_cache[frame_hash] = frame |
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39
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if self.base_port: |
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40
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self.base_tnc.write(frame, self.base_port) |
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41
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else: |
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42
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self.base_tnc.write(frame) |
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43
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apex.echo_colorized_frame(frame, self.base_name, False) |
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44
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45
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def read(self, *args, **kwargs): |
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46
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with self.lock: |
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47
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frame = self.base_tnc.read(*args, **kwargs) |
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48
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if not frame: |
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49
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return frame |
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50
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frame_hash = str(apex.aprs.util.hash_frame(frame)) |
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51
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self.packet_cache[frame_hash] = frame |
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52
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apex.echo_colorized_frame(frame, self.base_name, True) |
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53
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return frame |
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54
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Syncleus /
apex
