Mercurial > templog
annotate py/params.py @ 208:ea800fcc1ad4
improve README
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Thu, 26 Jun 2014 21:35:23 +0800 |
| parents | 78255c49bf9a |
| children | 16a83e2c97a0 |
| rev | line source |
|---|---|
| 145 | 1 # -*- coding: utf-8 -*- |
| 2 import collections | |
| 3 import json | |
| 157 | 4 import signal |
| 160 | 5 import StringIO |
| 157 | 6 |
| 7 import gevent | |
| 8 | |
| 145 | 9 import config |
| 148 | 10 from utils import W,L,E,EX |
| 145 | 11 |
| 12 _FIELD_DEFAULTS = { | |
| 13 'fridge_setpoint': 16, | |
| 14 'fridge_difference': 0.2, | |
| 15 'overshoot_delay': 720, # 12 minutes | |
| 16 'overshoot_factor': 1, # ºC | |
|
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Add daemon mode with locking, add "disabled" parameter
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17 'disabled': False, |
| 168 | 18 'nowort': False, |
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make fridge air range a parameter
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19 'fridge_range_lower': 3, |
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20 'fridge_range_upper': 3, |
| 145 | 21 } |
| 22 | |
| 23 class Params(dict): | |
| 24 class Error(Exception): | |
| 25 pass | |
| 26 | |
| 27 def __init__(self): | |
| 28 self.update(_FIELD_DEFAULTS) | |
| 157 | 29 gevent.signal(signal.SIGHUP, self.reload_signal) |
| 145 | 30 |
| 31 def __getattr__(self, k): | |
| 32 return self[k] | |
| 33 | |
| 34 def __setattr__(self, k, v): | |
| 35 # fail if we set a bad value | |
| 36 self[k] | |
| 37 self[k] = v | |
| 38 | |
| 39 def load(self, f = None): | |
| 40 if not f: | |
| 148 | 41 try: |
| 42 f = file(config.PARAMS_FILE, 'r') | |
| 43 except IOError, e: | |
| 44 W("Missing parameter file, using defaults. %s", e) | |
| 45 return | |
| 157 | 46 try: |
| 47 u = json.load(f) | |
| 48 except Exception, e: | |
| 49 raise self.Error(e) | |
| 50 | |
| 145 | 51 for k in u: |
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52 if k.startswith('_'): |
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53 continue |
| 145 | 54 if k not in self: |
| 55 raise self.Error("Unknown parameter %s=%s in file '%s'" % (str(k), str(u[k]), getattr(f, 'name', '???'))) | |
| 56 self.update(u) | |
| 57 | |
| 160 | 58 L("Loaded parameters") |
| 59 L(self.save_string()) | |
| 60 | |
| 61 | |
| 145 | 62 def save(self, f = None): |
| 63 if not f: | |
| 64 f = file(config.PARAMS_FILE, 'w') | |
| 65 json.dump(self, f, sort_keys=True, indent=4) | |
| 155 | 66 f.write('\n') |
| 145 | 67 f.flush() |
| 157 | 68 |
| 160 | 69 def save_string(self): |
| 70 s = StringIO.StringIO() | |
| 71 self.save(s) | |
| 72 return s.getvalue() | |
| 73 | |
| 157 | 74 def reload_signal(self): |
| 75 try: | |
| 76 self.load() | |
| 160 | 77 L("Reloaded.") |
| 157 | 78 except self.Error, e: |
| 79 W("Problem reloading: %s" % str(e)) |