diff options
author | Andrew Cady <d@jerkface.net> | 2017-04-08 16:16:51 -0400 |
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committer | Andrew Cady <d@jerkface.net> | 2017-04-08 16:16:51 -0400 |
commit | 572aad546bb8ee9ccd095a2098e1b292176c53da (patch) | |
tree | e5b0dc38abfd61cc128b94e15c05820a45cb7396 | |
parent | ba6cf9e875f28165fefd447d078771c989289eee (diff) |
re-implement polling using "devicer" library
-rw-r--r-- | dexcom_reader/devicer.py | 72 | ||||
-rwxr-xr-x | dexcom_reader/dexcom_dumper.py | 61 |
2 files changed, 132 insertions, 1 deletions
diff --git a/dexcom_reader/devicer.py b/dexcom_reader/devicer.py new file mode 100644 index 0000000..79a0a72 --- /dev/null +++ b/dexcom_reader/devicer.py | |||
@@ -0,0 +1,72 @@ | |||
1 | import pyudev | ||
2 | import threading | ||
3 | |||
4 | class DevicePoller: | ||
5 | def __init__(self, dev): | ||
6 | self.device_added = threading.Event() | ||
7 | self.device_removed = threading.Event() | ||
8 | self.device = dev | ||
9 | self.wait_add = self.device_added.wait | ||
10 | self.wait_remove = self.device_removed.wait | ||
11 | self.have = self.device_added.is_set | ||
12 | |||
13 | if dev: | ||
14 | self.device_added.set() | ||
15 | |||
16 | def launch_observer(self, monitor, device_match): | ||
17 | |||
18 | if not monitor: | ||
19 | monitor = pyudev.Monitor.from_netlink(pyudev.Context()) | ||
20 | |||
21 | def handle_event(action, device): | ||
22 | if action == 'add' and device_match(device): | ||
23 | self.device = device | ||
24 | self.device_removed.clear() | ||
25 | self.device_added.set() | ||
26 | elif action == 'remove' and device == self.device: | ||
27 | self.device = None | ||
28 | self.device_added.clear() | ||
29 | self.device_removed.set() | ||
30 | |||
31 | self.observer = pyudev.MonitorObserver(monitor, handle_event) | ||
32 | self.observer.start() | ||
33 | |||
34 | def stop_observer(): | ||
35 | self.observer.stop() | ||
36 | |||
37 | def simple_devicer(subsystem, predicate): | ||
38 | dev = None | ||
39 | context = pyudev.Context() | ||
40 | for try_dev in context.list_devices(subsystem=subsystem): | ||
41 | if predicate(try_dev): | ||
42 | dev = try_dev | ||
43 | break | ||
44 | |||
45 | monitor = pyudev.Monitor.from_netlink(context) | ||
46 | monitor.filter_by(subsystem) | ||
47 | |||
48 | devicer = DevicePoller(dev) | ||
49 | devicer.launch_observer(monitor, predicate) | ||
50 | |||
51 | return devicer | ||
52 | |||
53 | if __name__ == '__main__': | ||
54 | |||
55 | dexcom_g5_product = '22a3/47/100' | ||
56 | |||
57 | def is_dexcom_g5(dev): | ||
58 | try: return dev.parent.get('PRODUCT') == dexcom_g5_product | ||
59 | except: return False | ||
60 | |||
61 | devicer = simple_devicer('tty', is_dexcom_g5) | ||
62 | |||
63 | while True: | ||
64 | print("waiting for device") | ||
65 | devicer.wait_add() | ||
66 | while devicer.have(): | ||
67 | print("poll device {0}".format(devicer.device)) | ||
68 | print("sleep(5)") | ||
69 | if devicer.wait_remove(5): | ||
70 | print("device removed") | ||
71 | |||
72 | devicer.stop_observer() | ||
diff --git a/dexcom_reader/dexcom_dumper.py b/dexcom_reader/dexcom_dumper.py index be5b0d8..e7db00e 100755 --- a/dexcom_reader/dexcom_dumper.py +++ b/dexcom_reader/dexcom_dumper.py | |||
@@ -4,6 +4,7 @@ import readdata | |||
4 | import sys | 4 | import sys |
5 | import json | 5 | import json |
6 | import traceback | 6 | import traceback |
7 | from devicer import simple_devicer | ||
7 | # import requests # As this takes SEVEN SECONDS, it's delayed until needed | 8 | # import requests # As this takes SEVEN SECONDS, it's delayed until needed |
8 | from sys import stdout, stderr | 9 | from sys import stdout, stderr |
9 | from datetime import timedelta, datetime | 10 | from datetime import timedelta, datetime |
@@ -206,6 +207,64 @@ def poll_remote(): | |||
206 | else: | 207 | else: |
207 | sleep_verbose(10) | 208 | sleep_verbose(10) |
208 | 209 | ||
210 | def poll_remote_redux(): | ||
211 | (n, r) = remote_update('EGV_DATA') | ||
212 | if n is None: | ||
213 | return 10 | ||
214 | else: | ||
215 | now = dr.ReadSystemTime() | ||
216 | if n == 0: | ||
217 | send_ping(now) | ||
218 | if r: | ||
219 | for t in ['METER_DATA', 'INSERTION_TIME', 'USER_EVENT_DATA']: | ||
220 | # TODO: track how long this takes & adjust sleep accordingly | ||
221 | try: | ||
222 | remote_update(t) | ||
223 | except: | ||
224 | traceback.print_exc() | ||
225 | next_reading = (r.system_time - now + timedelta(minutes=5, seconds=2)).total_seconds() | ||
226 | return max(10, next_reading) | ||
227 | else: | ||
228 | return 10 | ||
229 | |||
230 | def poll_redux(): | ||
231 | poll = poll_remote_redux | ||
232 | |||
233 | dexcom_g5_product = '22a3/47/100' | ||
234 | |||
235 | def is_dexcom_g5(dev): | ||
236 | try: return dev.parent.get('PRODUCT') == dexcom_g5_product | ||
237 | except: return False | ||
238 | |||
239 | devicer = simple_devicer('tty', is_dexcom_g5) | ||
240 | |||
241 | while True: | ||
242 | try: | ||
243 | print_verbose("Waiting for device.") | ||
244 | if not devicer.wait_add(600): | ||
245 | continue | ||
246 | print_verbose("Device found.") | ||
247 | |||
248 | global dr | ||
249 | if dr: | ||
250 | dr.Disconnect() | ||
251 | dr = readdata.DexcomG5(devicer.device.device_node) | ||
252 | |||
253 | print("Device opened.") | ||
254 | while devicer.have(): | ||
255 | print_verbose("Polling device.") | ||
256 | try: | ||
257 | sleeptime = poll() | ||
258 | except: | ||
259 | sleeptime = 10 | ||
260 | |||
261 | if devicer.wait_remove(sleeptime): | ||
262 | print_verbose("Device unplugged.") | ||
263 | dr.Disconnect() | ||
264 | dr = None | ||
265 | except KeyboardInterrupt: | ||
266 | break | ||
267 | |||
209 | def poll_stdout(): | 268 | def poll_stdout(): |
210 | (r, now) = read_recent_egv_data() | 269 | (r, now) = read_recent_egv_data() |
211 | connected(True) | 270 | connected(True) |
@@ -343,5 +402,5 @@ def toJSON(o): | |||
343 | {"dump_everything": dump_everything, | 402 | {"dump_everything": dump_everything, |
344 | "dump_cgm": dump_cgm, | 403 | "dump_cgm": dump_cgm, |
345 | "poll": poll, | 404 | "poll": poll, |
346 | "test": test, | 405 | "test": poll_redux, |
347 | }[command]() | 406 | }[command]() |