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annotate service/piNode/piNode.py @ 636:7c04b4f675ec

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piNode to py3 Ignore-this: c04a6b87bb776997781404c7e76898d4
author drewp@bigasterisk.com
date Mon, 12 Aug 2019 10:07:49 -0700
parents accbbd521ecd
children ad1756af9d99
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rev   line source
636
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1 import logging, socket, json, time, pkg_resources
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2 import cyclone.web
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3 from cyclone.httpclient import fetch
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4 from rdflib import Namespace, URIRef, Literal, Graph, RDF, ConjunctiveGraph
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5 from rdflib.parser import StringInputSource
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6 from twisted.internet import reactor
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7 from twisted.internet.defer import inlineCallbacks, maybeDeferred, returnValue
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8 from twisted.internet.threads import deferToThread
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9 from docopt import docopt
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10 import etcd3
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11 from greplin import scales
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12 from greplin.scales.cyclonehandler import StatsHandler
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13 import pigpio
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14 import treq
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15
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16 from patchablegraph import PatchableGraph, CycloneGraphHandler, CycloneGraphEventsHandler
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17 from cycloneerr import PrettyErrorHandler
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18
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19 from rdfdb.rdflibpatch import inContext
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20 from rdfdb.patch import Patch
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21
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22 try:
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23 import pigpio
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24 except ImportError:
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25 class pigpio(object):
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26 @staticmethod
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27 def pi():
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28 return None
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29
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30 import devices
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31 from export_to_influxdb import InfluxExporter
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32
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33 log = logging.getLogger()
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34 logging.getLogger('serial').setLevel(logging.WARN)
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35
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36 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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37 HOST = Namespace('http://bigasterisk.com/ruler/host/')
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38
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39 hostname = socket.gethostname()
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40 CTX = ROOM['pi/%s' % hostname]
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41
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42 STATS = scales.collection('/root',
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43 scales.PmfStat('configReread'),
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44 scales.IntStat('pollException'),
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45 scales.PmfStat('pollAll'),
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46 scales.PmfStat('boardPoll'),
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47 scales.PmfStat('sendOneshot'),
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48 scales.PmfStat('outputStatements'),
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49
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50 )
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51 def patchRandid():
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52 """
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53 I'm concerned urandom is slow on raspberry pi, and I'm adding to
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54 graphs a lot. Unclear what the ordered return values might do to
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55 the balancing of the graph.
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56 """
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57 _id_serial = [1000]
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58 def randid():
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59 _id_serial[0] += 1
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60 return _id_serial[0]
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61 import rdflib.plugins.memory
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62 rdflib.plugins.memory.randid = randid
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63 patchRandid()
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64
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65 class Config(object):
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66 def __init__(self, masterGraph, hubHost):
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67 self.etcd = etcd3.client(host=hubHost, port=9022)
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68
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69 self.masterGraph = masterGraph
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70 self.hubHost = hubHost
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71 self.configGraph = ConjunctiveGraph()
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72 self.boards = []
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73 self.etcPrefix = 'pi/'
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74 self.rereadLater = None
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75
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76 self.reread()
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77
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78 deferToThread(self.watchEtcd)
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79
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80 def watchEtcd(self):
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81 events, cancel = self.etcd.watch_prefix(self.etcPrefix)
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82 reactor.addSystemEventTrigger('before', 'shutdown', cancel)
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83 for ev in events:
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84 log.info('%s changed', ev.key)
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85 reactor.callFromThread(self.configChanged)
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86
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87 def configChanged(self):
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88 self.cancelRead()
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89 self.rereadLater = reactor.callLater(.1, self.reread)
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90
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91 def cancelRead(self):
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92 if self.rereadLater:
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93 self.rereadLater.cancel()
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94 self.rereadLater = None
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95
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96 @STATS.configReread.time()
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97 def reread(self):
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98 self.rereadLater = None
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99 log.info('read config')
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100 self.configGraph = ConjunctiveGraph()
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101 for v, md in self.etcd.get_prefix(self.etcPrefix):
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102 log.info(' read file %r', md.key)
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103 self.configGraph.parse(StringInputSource(v), format='n3')
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104 self.configGraph.bind('', ROOM)
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105 self.configGraph.bind('rdf', RDF)
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106 # config graph is too noisy; maybe make it a separate resource
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107 #masterGraph.patch(Patch(addGraph=self.configGraph))
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108 self.setupBoards()
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109
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110 def setupBoards(self):
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111 thisHost = Literal(hostname)
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112 for row in self.configGraph.query(
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113 'SELECT ?board WHERE { ?board a :PiBoard; :hostname ?h }',
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114 initBindings=dict(h=thisHost)):
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115 thisBoard = row.board
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116 break
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117 else:
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118 log.warn("config had no board for :hostname %s. Waiting for config update." %
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119 thisHost)
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120 self.boards = []
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121 return
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122
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123 log.info("found config for board %r" % thisBoard)
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124 self.boards = [Board(self.configGraph, self.masterGraph, thisBoard, self.hubHost)]
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125 self.boards[0].startPolling()
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126
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127
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128 class DeviceRunner(object):
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129 def __init__(self, dev):
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130 self.dev = dev
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131 self.period = getattr(self.dev, 'pollPeriod', .05)
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132 #self._lastPollTime.get(i.uri, 0) + self.pollPeriod > now):
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133
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134 reactor.callLater(0, self.poll)
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135
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136 @inlineCallbacks
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137 def poll(self):
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138 now = time.time()
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139 try:
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140 with self.dev.stats.poll.time():
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141 new = yield maybeDeferred(self.dev.poll)
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142 finally:
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143 reactor.callLater(max(0, time.time() - (now + self.period)), self.poll)
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144 returnValue(new)
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145
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146 class Board(object):
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147 """similar to arduinoNode.Board but without the communications stuff"""
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148 def __init__(self, graph, masterGraph, uri, hubHost):
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149 self.graph, self.uri = graph, uri
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150 self.hubHost = hubHost
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151 self.masterGraph = masterGraph
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152
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153 self.masterGraph.setToGraph(self.staticStmts())
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154 self.pi = pigpio.pi()
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155 self._devs = [DeviceRunner(d) for d in devices.makeDevices(graph, self.uri, self.pi)]
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156 log.debug('found %s devices', len(self._devs))
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157 self._statementsFromInputs = {} # input device uri: latest statements
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158 self._lastPollTime = {} # input device uri: time()
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diff changeset
159 self._influx = InfluxExporter(self.graph)
233
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160 for d in self._devs:
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161 self.syncMasterGraphToHostStatements(d.dev)
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162
182
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163 def startPolling(self):
243
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diff changeset
164 task.LoopingCall(self._poll).start(.05)
182
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165
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166 @STATS.boardPoll.time() # not differentiating multiple boards here
182
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167 def _poll(self):
271
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168 try:
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169 self._pollMaybeError()
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170 except Exception:
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171 STATS.pollException += 1
271
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172 log.exception("During poll:")
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173
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174
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175 @inlineCallbacks
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176 def _pollOneDev(self, i):
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177 now = time.time()
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178
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179 new = i.poll()
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180 if isinstance(new, dict): # new style
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181 oneshot = new['oneshot']
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182 new = new['latest']
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183 else:
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184 oneshot = None
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185
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186 self._updateMasterWithNewPollStatements(i.uri, new)
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187
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188 if oneshot:
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189 self._sendOneshot(oneshot)
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190 self._lastPollTime[i.uri] = now
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191
589
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192 @inlineCallbacks
271
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193 def _pollMaybeError(self):
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194 pollTime = {} # uri: sec
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195 yield gatherResults([self._pollOneDev(i.dev, pollTime)
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196 for i in self._devs], consumeErrors=True)
251
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197
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198 pollResults = map(set, self._statementsFromInputs.values())
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199 if pollResults:
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200 self._influx.exportToInflux(set.union(*pollResults))
221
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201
349
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202 def _updateMasterWithNewPollStatements(self, dev, new):
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203 prev = self._statementsFromInputs.get(dev, set())
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204
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205 # it's important that quads from different devices
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206 # don't clash, since that can lead to inconsistent
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207 # patches (e.g.
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208 # dev1 changes value from 1 to 2;
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209 # dev2 changes value from 2 to 3;
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210 # dev1 changes from 2 to 4 but this patch will
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211 # fail since the '2' statement is gone)
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212 self.masterGraph.patch(Patch.fromDiff(inContext(prev, dev),
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213 inContext(new, dev)))
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214 self._statementsFromInputs[dev] = new
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215
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216 @STATS.sendOneshot.time()
251
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217 def _sendOneshot(self, oneshot):
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218 body = (' '.join('%s %s %s .' % (s.n3(), p.n3(), o.n3())
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219 for s,p,o in oneshot)).encode('utf8')
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220 url = 'http://%s:9071/oneShot' % self.hubHost
271
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diff changeset
221 d = fetch(method='POST',
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222 url=url,
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223 headers={'Content-Type': ['text/n3']},
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224 postdata=body,
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225 timeout=5)
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226 def err(e):
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227 log.info('oneshot post to %r failed: %s',
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228 url, e.getErrorMessage())
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229 d.addErrback(err)
251
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diff changeset
230
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diff changeset
231 @STATS.outputStatements.time()
233
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232 def outputStatements(self, stmts):
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233 unused = set(stmts)
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234 for devRunner in self._devs:
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235 dev = devRunner.dev
233
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236 stmtsForDev = []
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237 for pat in dev.outputPatterns():
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238 if [term is None for term in pat] != [False, False, True]:
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239 raise NotImplementedError
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240 for stmt in stmts:
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241 if stmt[:2] == pat[:2]:
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242 stmtsForDev.append(stmt)
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243 unused.discard(stmt)
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244 if stmtsForDev:
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245 log.info("output goes to action handler for %s" % dev.uri)
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diff changeset
246 with dev.stats.output.time():
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diff changeset
247 dev.sendOutput(stmtsForDev)
233
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248
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249 # Dev *could* change hostStatements at any time, and
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diff changeset
250 # we're not currently tracking that, but the usual is
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251 # to change them in response to sendOutput so this
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252 # should be good enough. The right answer is to give
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253 # each dev the masterGraph for it to write to.
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diff changeset
254 self.syncMasterGraphToHostStatements(dev)
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diff changeset
255 log.info("output and masterGraph sync complete")
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diff changeset
256 if unused:
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diff changeset
257 log.info("Board %s doesn't care about these statements:", self.uri)
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diff changeset
258 for s in unused:
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diff changeset
259 log.warn("%r", s)
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diff changeset
260
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diff changeset
261 def syncMasterGraphToHostStatements(self, dev):
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diff changeset
262 hostStmtCtx = URIRef(dev.uri + '/host')
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diff changeset
263 newQuads = inContext(dev.hostStatements(), hostStmtCtx)
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diff changeset
264 p = self.masterGraph.patchSubgraph(hostStmtCtx, newQuads)
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diff changeset
265 log.debug("patch master with these host stmts %s", p)
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parents: 230
diff changeset
266
226
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parents: 225
diff changeset
267 def staticStmts(self):
233
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diff changeset
268 return [(HOST[hostname], ROOM['connectedTo'], self.uri, CTX)]
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269
183
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diff changeset
270 def description(self):
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diff changeset
271 """for web page"""
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diff changeset
272 return {
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diff changeset
273 'uri': self.uri,
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274 'devices': [d.dev.description() for d in self._devs],
183
634d6e477953 get piNode working, for motionsensor at least
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275 'graph': 'http://sticker:9059/graph', #todo
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276 }
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diff changeset
277
184
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diff changeset
278 def rdfGraphBody(body, headers):
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diff changeset
279 g = Graph()
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diff changeset
280 g.parse(StringInputSource(body), format='nt')
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diff changeset
281 return g
183
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diff changeset
282
591
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diff changeset
283 class OutputPage(PrettyErrorHandler, cyclone.web.RequestHandler):
182
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284 def put(self):
184
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diff changeset
285 arg = self.request.arguments
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diff changeset
286 if arg.get('s') and arg.get('p'):
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parents: 183
diff changeset
287 subj = URIRef(arg['s'][-1])
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parents: 183
diff changeset
288 pred = URIRef(arg['p'][-1])
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parents: 183
diff changeset
289 turtleLiteral = self.request.body
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parents: 183
diff changeset
290 try:
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diff changeset
291 obj = Literal(float(turtleLiteral))
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parents: 183
diff changeset
292 except ValueError:
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diff changeset
293 obj = Literal(turtleLiteral)
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diff changeset
294 stmt = (subj, pred, obj)
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diff changeset
295 else:
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parents: 183
diff changeset
296 g = rdfGraphBody(self.request.body, self.request.headers)
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diff changeset
297 assert len(g) == 1, len(g)
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diff changeset
298 stmt = next(g.triples((None, None, None)))
182
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299
347
97f5cbcac00b pi read config over etcd
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diff changeset
300 for b in self.settings.config.boards:
636
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diff changeset
301 b.outputStatements({stmt})
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302
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303 class Boards(PrettyErrorHandler, cyclone.web.RequestHandler):
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304 def get(self):
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305 self.set_header('Content-type', 'application/json')
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306 self.write(json.dumps({
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307 'host': hostname,
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308 'boards': [b.description() for b in self.settings.config.boards]
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309 }, indent=2))
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310
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311 def main():
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312 arg = docopt("""
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313 Usage: piNode.py [options]
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314
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315 -v Verbose
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316 --ow Just report onewire device URIs and readings, then exit.
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317 --hub=HOST Hostname for etc3 and oneshot posts. [default: bang.vpn-home.bigasterisk.com]
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318 """)
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319 log.setLevel(logging.WARN)
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320 if arg['-v']:
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321 from twisted.python import log as twlog
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322 twlog.startLogging(sys.stdout)
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323
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324 log.setLevel(logging.DEBUG)
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325
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326 if arg['--ow']:
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327 log.setLevel(logging.INFO)
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328 for stmt in devices.OneWire().poll():
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329 print(stmt)
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330 return
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331
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332 masterGraph = PatchableGraph()
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333 config = Config(masterGraph, arg['--hub'])
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334
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335 static = pkg_resources.resource_filename('homeauto_anynode', 'static/')
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336
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337 reactor.listenTCP(9059, cyclone.web.Application([
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338 (r"/(|output-widgets.html)", cyclone.web.StaticFileHandler, {
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339 "path": static, "default_filename": "index.html"}),
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340 (r'/static/(.*)', cyclone.web.StaticFileHandler, {"path": static}),
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341 (r'/stats/(.*)', StatsHandler, {'serverName': 'piNode'}),
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342 (r'/boards', Boards),
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343 (r"/graph", CycloneGraphHandler, {'masterGraph': masterGraph}),
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344 (r"/graph/events", CycloneGraphEventsHandler, {'masterGraph': masterGraph}),
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345 (r'/output', OutputPage),
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346 ], config=config, debug=arg['-v']), interface='::')
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347 log.warn('serving on 9059')
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348 reactor.run()
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349
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350 main()