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# These imports are for python3 compatibility inside python2 |
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from __future__ import absolute_import |
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from __future__ import division |
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from __future__ import print_function |
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6
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import threading |
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import cachetools |
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import apex.aprs.util |
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12
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class NonrepeatingBuffer(object): |
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def __init__(self, base_tnc, base_name, base_port=None, echo_packets=True, buffer_size=10000, buffer_time=30): |
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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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self.echo_packets = echo_packets |
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@property |
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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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def connect(self, *args, **kwargs): |
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self.base_tnc.connect(*args, **kwargs) |
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def close(self, *args, **kwargs): |
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self.base_tnc.close(*args, **kwargs) |
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def write(self, frame, *args, **kwargs): |
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with self.lock: |
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frame_hash = str(apex.aprs.util.hash_frame(frame)) |
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if frame_hash not in self.packet_cache: |
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self.packet_cache[frame_hash] = frame |
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if self.base_port: |
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self.base_tnc.write(frame, self.base_port) |
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else: |
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self.base_tnc.write(frame) |
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if self.echo_packets: |
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apex.echo_colorized_frame(frame, self.base_name, False) |
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def read(self, *args, **kwargs): |
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with self.lock: |
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frame = self.base_tnc.read(*args, **kwargs) |
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if not frame: |
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return frame |
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frame_hash = str(apex.aprs.util.hash_frame(frame)) |
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if frame_hash not in self.packet_cache: |
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self.packet_cache[frame_hash] = frame |
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if self.echo_packets: |
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apex.echo_colorized_frame(frame, self.base_name, True) |
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return frame |
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else: |
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return None |
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Syncleus /
apex
