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annotate service/piNode/piNode.py @ 639:ad1756af9d99

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more piNode wip. treq etc Ignore-this: 153da9ea2f0e0cf56ec2ccb0c5dd5c5
author drewp@bigasterisk.com
date Mon, 12 Aug 2019 10:14:45 -0700
parents 7c04b4f675ec
children 23ab244aa649
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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 rdflib import Namespace, URIRef, Literal, Graph, RDF, ConjunctiveGraph
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4 from rdflib.parser import StringInputSource
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5 from twisted.internet import reactor
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6 from twisted.internet.defer import inlineCallbacks, maybeDeferred, returnValue
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7 from twisted.internet.threads import deferToThread
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8 from docopt import docopt
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9 import etcd3
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10 from greplin import scales
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11 from greplin.scales.cyclonehandler import StatsHandler
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12 import pigpio
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13 import treq
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14
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15 from patchablegraph import PatchableGraph, CycloneGraphHandler, CycloneGraphEventsHandler
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16 from cycloneerr import PrettyErrorHandler
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17
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18 from rdfdb.rdflibpatch import inContext
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19 from rdfdb.patch import Patch
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20
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21 try:
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22 import pigpio
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23 except ImportError:
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24 class pigpio(object):
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25 @staticmethod
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26 def pi():
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27 return None
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28
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29 import devices
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30 from export_to_influxdb import InfluxExporter
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31
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32 log = logging.getLogger()
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33 logging.getLogger('serial').setLevel(logging.WARN)
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34
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35 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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36 HOST = Namespace('http://bigasterisk.com/ruler/host/')
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37
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38 hostname = socket.gethostname()
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39 CTX = ROOM['pi/%s' % hostname]
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40
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41 STATS = scales.collection('/root',
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42 scales.PmfStat('configReread'),
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43 scales.IntStat('pollException'),
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44 scales.PmfStat('pollAll'),
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45 scales.PmfStat('boardPoll'),
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46 scales.PmfStat('sendOneshot'),
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47 scales.PmfStat('outputStatements'),
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48
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49 )
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50
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51 class Config(object):
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52 def __init__(self, masterGraph, hubHost):
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53 self.etcd = etcd3.client(host=hubHost, port=9022)
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54
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55 self.masterGraph = masterGraph
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56 self.hubHost = hubHost
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57 self.configGraph = ConjunctiveGraph()
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58 self.boards = []
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59 self.etcPrefix = 'pi/'
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60 self.rereadLater = None
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61
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62 self.reread()
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63
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64 deferToThread(self.watchEtcd)
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65
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66 def watchEtcd(self):
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67 events, cancel = self.etcd.watch_prefix(self.etcPrefix)
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68 reactor.addSystemEventTrigger('before', 'shutdown', cancel)
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69 for ev in events:
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70 log.info('%s changed', ev.key)
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71 reactor.callFromThread(self.configChanged)
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72
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73 def configChanged(self):
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74 self.cancelRead()
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75 self.rereadLater = reactor.callLater(.1, self.reread)
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76
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77 def cancelRead(self):
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78 if self.rereadLater:
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79 self.rereadLater.cancel()
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80 self.rereadLater = None
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81
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82 @STATS.configReread.time()
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83 def reread(self):
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84 self.rereadLater = None
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85 log.info('read config')
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86 self.configGraph = ConjunctiveGraph()
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87 for v, md in self.etcd.get_prefix(self.etcPrefix):
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88 log.info(' read file %r', md.key)
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89 self.configGraph.parse(StringInputSource(v), format='n3')
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90 self.configGraph.bind('', ROOM)
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91 self.configGraph.bind('rdf', RDF)
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92 # config graph is too noisy; maybe make it a separate resource
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93 #masterGraph.patch(Patch(addGraph=self.configGraph))
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94 self.setupBoards()
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95
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96 def setupBoards(self):
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97 thisHost = Literal(hostname)
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98 for row in self.configGraph.query(
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99 'SELECT ?board WHERE { ?board a :PiBoard; :hostname ?h }',
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100 initBindings=dict(h=thisHost)):
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101 thisBoard = row.board
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102 break
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103 else:
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104 log.warn("config had no board for :hostname %s. Waiting for config update." %
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105 thisHost)
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106 self.boards = []
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107 return
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108
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109 log.info("found config for board %r" % thisBoard)
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110 self.boards = [Board(self.configGraph, self.masterGraph, thisBoard, self.hubHost)]
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111
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112
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113 class DeviceRunner(object):
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114 def __init__(self, dev):
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115 self.dev = dev
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116 self.period = getattr(self.dev, 'pollPeriod', .05)
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117 #self._lastPollTime.get(i.uri, 0) + self.pollPeriod > now):
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118
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119 reactor.callLater(0, self.poll)
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120
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121 @inlineCallbacks
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122 def poll(self):
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123 now = time.time()
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124 try:
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125 with self.dev.stats.poll.time():
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126 new = yield maybeDeferred(self.dev.poll)
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127 finally:
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128 reactor.callLater(max(0, time.time() - (now + self.period)), self.poll)
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129 returnValue(new)
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130
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131 class Board(object):
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132 """similar to arduinoNode.Board but without the communications stuff"""
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133 def __init__(self, graph, masterGraph, uri, hubHost):
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134 self.graph, self.uri = graph, uri
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135 self.hubHost = hubHost
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136 self.masterGraph = masterGraph
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137
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138 self.masterGraph.setToGraph(self.staticStmts())
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139 self.pi = pigpio.pi()
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140 self._devs = [DeviceRunner(d) for d in devices.makeDevices(graph, self.uri, self.pi)]
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141 log.debug('found %s devices', len(self._devs))
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142 self._statementsFromInputs = {} # input device uri: latest statements
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143 self._lastPollTime = {} # input device uri: time()
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144 self._influx = InfluxExporter(self.graph)
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145 for d in self._devs:
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146 self.syncMasterGraphToHostStatements(d.dev)
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147
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148 def startPolling(self):
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149 task.LoopingCall(self._poll).start(.05)
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150
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151 @STATS.boardPoll.time() # not differentiating multiple boards here
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152 def _poll(self):
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153 try:
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154 self._pollMaybeError()
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155 except Exception:
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156 STATS.pollException += 1
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diff changeset
157 log.exception("During poll:")
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158
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159
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diff changeset
160 @inlineCallbacks
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diff changeset
161 def _pollOneDev(self, i):
589
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diff changeset
162 now = time.time()
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163
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164 new = i.poll()
589
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diff changeset
165 if isinstance(new, dict): # new style
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diff changeset
166 oneshot = new['oneshot']
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diff changeset
167 new = new['latest']
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168 else:
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diff changeset
169 oneshot = None
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170
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diff changeset
171 self._updateMasterWithNewPollStatements(i.uri, new)
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172
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173 if oneshot:
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diff changeset
174 self._sendOneshot(oneshot)
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diff changeset
175 self._lastPollTime[i.uri] = now
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176
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diff changeset
177 @inlineCallbacks
271
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178 def _pollMaybeError(self):
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179 pollTime = {} # uri: sec
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180 yield gatherResults([self._pollOneDev(i.dev, pollTime)
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181 for i in self._devs], consumeErrors=True)
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182
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183 pollResults = map(set, self._statementsFromInputs.values())
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184 if pollResults:
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185 self._influx.exportToInflux(set.union(*pollResults))
221
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186
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187 def _updateMasterWithNewPollStatements(self, dev, new):
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188 prev = self._statementsFromInputs.get(dev, set())
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189
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190 # it's important that quads from different devices
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191 # don't clash, since that can lead to inconsistent
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192 # patches (e.g.
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193 # dev1 changes value from 1 to 2;
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194 # dev2 changes value from 2 to 3;
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195 # dev1 changes from 2 to 4 but this patch will
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196 # fail since the '2' statement is gone)
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197 self.masterGraph.patch(Patch.fromDiff(inContext(prev, dev),
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198 inContext(new, dev)))
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199 self._statementsFromInputs[dev] = new
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200
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diff changeset
201 @STATS.sendOneshot.time()
251
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202 def _sendOneshot(self, oneshot):
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203 body = (' '.join('%s %s %s .' % (s.n3(), p.n3(), o.n3())
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204 for s,p,o in oneshot)).encode('utf8')
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205 url = 'http://%s:9071/oneShot' % self.hubHost
271
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206 d = fetch(method='POST',
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207 url=url,
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208 headers={'Content-Type': ['text/n3']},
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209 postdata=body,
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210 timeout=5)
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211 def err(e):
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212 log.info('oneshot post to %r failed: %s',
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213 url, e.getErrorMessage())
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214 d.addErrback(err)
251
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215
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diff changeset
216 @STATS.outputStatements.time()
233
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217 def outputStatements(self, stmts):
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218 unused = set(stmts)
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219 for devRunner in self._devs:
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220 dev = devRunner.dev
233
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221 stmtsForDev = []
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222 for pat in dev.outputPatterns():
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223 if [term is None for term in pat] != [False, False, True]:
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224 raise NotImplementedError
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225 for stmt in stmts:
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226 if stmt[:2] == pat[:2]:
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227 stmtsForDev.append(stmt)
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228 unused.discard(stmt)
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229 if stmtsForDev:
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230 log.info("output goes to action handler for %s" % dev.uri)
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231 with dev.stats.output.time():
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232 dev.sendOutput(stmtsForDev)
233
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233
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234 # Dev *could* change hostStatements at any time, and
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235 # we're not currently tracking that, but the usual is
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236 # to change them in response to sendOutput so this
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237 # should be good enough. The right answer is to give
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238 # each dev the masterGraph for it to write to.
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239 self.syncMasterGraphToHostStatements(dev)
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240 log.info("output and masterGraph sync complete")
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241 if unused:
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242 log.info("Board %s doesn't care about these statements:", self.uri)
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243 for s in unused:
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244 log.warn("%r", s)
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245
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246 def syncMasterGraphToHostStatements(self, dev):
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diff changeset
247 hostStmtCtx = URIRef(dev.uri + '/host')
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248 newQuads = inContext(dev.hostStatements(), hostStmtCtx)
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diff changeset
249 p = self.masterGraph.patchSubgraph(hostStmtCtx, newQuads)
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diff changeset
250 log.debug("patch master with these host stmts %s", p)
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diff changeset
251
226
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diff changeset
252 def staticStmts(self):
233
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253 return [(HOST[hostname], ROOM['connectedTo'], self.uri, CTX)]
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254
183
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255 def description(self):
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256 """for web page"""
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257 return {
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258 'uri': self.uri,
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259 'devices': [d.dev.description() for d in self._devs],
183
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260 'graph': 'http://sticker:9059/graph', #todo
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261 }
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262
184
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diff changeset
263 def rdfGraphBody(body, headers):
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diff changeset
264 g = Graph()
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265 g.parse(StringInputSource(body), format='nt')
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266 return g
183
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267
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268 class OutputPage(PrettyErrorHandler, cyclone.web.RequestHandler):
182
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269 def put(self):
184
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270 arg = self.request.arguments
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271 if arg.get('s') and arg.get('p'):
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272 subj = URIRef(arg['s'][-1])
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273 pred = URIRef(arg['p'][-1])
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diff changeset
274 turtleLiteral = self.request.body
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parents: 183
diff changeset
275 try:
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276 obj = Literal(float(turtleLiteral))
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diff changeset
277 except ValueError:
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278 obj = Literal(turtleLiteral)
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279 stmt = (subj, pred, obj)
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280 else:
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diff changeset
281 g = rdfGraphBody(self.request.body, self.request.headers)
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diff changeset
282 assert len(g) == 1, len(g)
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diff changeset
283 stmt = next(g.triples((None, None, None)))
182
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284
347
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diff changeset
285 for b in self.settings.config.boards:
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diff changeset
286 b.outputStatements({stmt})
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287
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diff changeset
288 class Boards(PrettyErrorHandler, cyclone.web.RequestHandler):
183
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diff changeset
289 def get(self):
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diff changeset
290 self.set_header('Content-type', 'application/json')
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diff changeset
291 self.write(json.dumps({
233
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diff changeset
292 'host': hostname,
347
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diff changeset
293 'boards': [b.description() for b in self.settings.config.boards]
183
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diff changeset
294 }, indent=2))
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295
182
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296 def main():
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297 arg = docopt("""
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298 Usage: piNode.py [options]
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299
408
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diff changeset
300 -v Verbose
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301 --ow Just report onewire device URIs and readings, then exit.
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302 --hub=HOST Hostname for etc3 and oneshot posts. [default: bang.vpn-home.bigasterisk.com]
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303 """)
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304 log.setLevel(logging.WARN)
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305 if arg['-v']:
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306 from twisted.python import log as twlog
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307 twlog.startLogging(sys.stdout)
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308
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309 log.setLevel(logging.DEBUG)
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310
408
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311 if arg['--ow']:
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312 log.setLevel(logging.INFO)
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313 for stmt in devices.OneWire().poll():
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314 print(stmt)
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315 return
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316
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317 masterGraph = PatchableGraph()
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318 config = Config(masterGraph, arg['--hub'])
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319
552
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320 static = pkg_resources.resource_filename('homeauto_anynode', 'static/')
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321
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322 reactor.listenTCP(9059, cyclone.web.Application([
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323 (r"/(|output-widgets.html)", cyclone.web.StaticFileHandler, {
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324 "path": static, "default_filename": "index.html"}),
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325 (r'/static/(.*)', cyclone.web.StaticFileHandler, {"path": static}),
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326 (r'/stats/(.*)', StatsHandler, {'serverName': 'piNode'}),
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327 (r'/boards', Boards),
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328 (r"/graph", CycloneGraphHandler, {'masterGraph': masterGraph}),
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329 (r"/graph/events", CycloneGraphEventsHandler, {'masterGraph': masterGraph}),
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330 (r'/output', OutputPage),
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331 ], config=config, debug=arg['-v']), interface='::')
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332 log.warn('serving on 9059')
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333 reactor.run()
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334
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335 main()