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annotate service/piNode/piNode.py @ 627:c3f0a98fa65d

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lib upgrades; fix a static http server path Ignore-this: f48022f37590e8bdb16957c49168d31b
author drewp@bigasterisk.com
date Thu, 08 Aug 2019 16:54:46 -0700
parents 69a84b3d1dfa
children accbbd521ecd
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1 from __future__ import division
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2 import sys, logging, socket, json, time, pkg_resources
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3 import cyclone.web
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4 from cyclone.httpclient import fetch
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5 from rdflib import Namespace, URIRef, Literal, Graph, RDF, ConjunctiveGraph
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6 from rdflib.parser import StringInputSource
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7 from twisted.internet import reactor, task
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8 from twisted.internet.defer import inlineCallbacks, maybeDeferred, gatherResults
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9 from twisted.internet.threads import deferToThread
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10 from docopt import docopt
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11 import etcd3
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12 from greplin import scales
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13 from greplin.scales.cyclonehandler import StatsHandler
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14
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15 logging.basicConfig(level=logging.DEBUG)
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16
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17 from patchablegraph import PatchableGraph, CycloneGraphHandler, CycloneGraphEventsHandler
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18 from cycloneerr import PrettyErrorHandler
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19
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20 from rdfdb.rdflibpatch import inContext
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21 from rdfdb.patch import Patch
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22
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23 try:
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24 import pigpio
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25 except ImportError:
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26 class pigpio(object):
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27 @staticmethod
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28 def pi():
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29 return None
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30
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31 import devices
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32 from export_to_influxdb import InfluxExporter
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33
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34 log = logging.getLogger()
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35 logging.getLogger('serial').setLevel(logging.WARN)
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36
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37 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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38 HOST = Namespace('http://bigasterisk.com/ruler/host/')
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39
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40 hostname = socket.gethostname()
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41 CTX = ROOM['pi/%s' % hostname]
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42
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43 STATS = scales.collection('/root',
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44 scales.PmfStat('configReread'),
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45 scales.IntStat('pollException'),
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46 scales.PmfStat('pollAll'),
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47 scales.PmfStat('boardPoll'),
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48 scales.PmfStat('sendOneshot'),
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49 scales.PmfStat('outputStatements'),
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50
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51 )
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52 def patchRandid():
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53 """
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54 I'm concerned urandom is slow on raspberry pi, and I'm adding to
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55 graphs a lot. Unclear what the ordered return values might do to
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56 the balancing of the graph.
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57 """
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58 _id_serial = [1000]
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59 def randid():
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60 _id_serial[0] += 1
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61 return _id_serial[0]
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62 import rdflib.plugins.memory
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63 rdflib.plugins.memory.randid = randid
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64 patchRandid()
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65
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66 class Config(object):
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67 def __init__(self, masterGraph, hubHost):
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68 self.etcd = etcd3.client(host=hubHost, port=9022)
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69
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70 self.masterGraph = masterGraph
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71 self.hubHost = hubHost
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72 self.configGraph = ConjunctiveGraph()
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73 self.boards = []
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74 self.etcPrefix = 'pi/'
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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 getattr(self, 'rereadLater', None):
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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 Board(object):
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129 """similar to arduinoNode.Board but without the communications stuff"""
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130 def __init__(self, graph, masterGraph, uri, hubHost):
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131 self.graph, self.uri = graph, uri
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132 self.hubHost = hubHost
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133 self.masterGraph = masterGraph
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134 self.masterGraph.setToGraph(self.staticStmts())
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135 self.pi = pigpio.pi()
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136 self._devs = devices.makeDevices(graph, self.uri, self.pi)
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137 log.debug('found %s devices', len(self._devs))
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138 self._statementsFromInputs = {} # input device uri: latest statements
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139 self._lastPollTime = {} # input device uri: time()
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140 self._influx = InfluxExporter(self.graph)
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141 for d in self._devs:
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142 self.syncMasterGraphToHostStatements(d)
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143
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144 def startPolling(self):
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145 task.LoopingCall(self._poll).start(.05)
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146
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147 @STATS.boardPoll.time() # not differentiating multiple boards here
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148 def _poll(self):
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149 try:
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150 self._pollMaybeError()
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151 except Exception:
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152 STATS.pollException += 1
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153 log.exception("During poll:")
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155
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156 @inlineCallbacks
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157 def _pollOneDev(self, i):
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diff changeset
158 now = time.time()
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159 if (hasattr(i, 'pollPeriod') and
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160 self._lastPollTime.get(i.uri, 0) + i.pollPeriod > now):
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diff changeset
161 return
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162 with i.stats.poll.time():
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163 new = yield maybeDeferred(i.poll)
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164
589
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165 if isinstance(new, dict): # new style
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166 oneshot = new['oneshot']
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167 new = new['latest']
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168 else:
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169 oneshot = None
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170
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171 self._updateMasterWithNewPollStatements(i.uri, new)
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172
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173 if oneshot:
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174 self._sendOneshot(oneshot)
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175 self._lastPollTime[i.uri] = now
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176
589
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177 @inlineCallbacks
271
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178 def _pollMaybeError(self):
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179 with STATS.pollAll.time():
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180 yield gatherResults([self._pollOneDev(i)
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181 for i in self._devs], consumeErrors=True)
251
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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))
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186
349
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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')
408
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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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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 dev in self._devs:
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220 stmtsForDev = []
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221 for pat in dev.outputPatterns():
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222 if [term is None for term in pat] != [False, False, True]:
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223 raise NotImplementedError
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224 for stmt in stmts:
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225 if stmt[:2] == pat[:2]:
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226 stmtsForDev.append(stmt)
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227 unused.discard(stmt)
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228 if stmtsForDev:
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229 log.info("output goes to action handler for %s" % dev.uri)
625
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230 with dev.stats.output.time():
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231 dev.sendOutput(stmtsForDev)
233
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232
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233 # Dev *could* change hostStatements at any time, and
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234 # we're not currently tracking that, but the usual is
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235 # to change them in response to sendOutput so this
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236 # should be good enough. The right answer is to give
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237 # each dev the masterGraph for it to write to.
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238 self.syncMasterGraphToHostStatements(dev)
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239 log.info("output and masterGraph sync complete")
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diff changeset
240 if unused:
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241 log.info("Board %s doesn't care about these statements:", self.uri)
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diff changeset
242 for s in unused:
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diff changeset
243 log.warn("%r", s)
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diff changeset
244
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diff changeset
245 def syncMasterGraphToHostStatements(self, dev):
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diff changeset
246 hostStmtCtx = URIRef(dev.uri + '/host')
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diff changeset
247 newQuads = inContext(dev.hostStatements(), hostStmtCtx)
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diff changeset
248 p = self.masterGraph.patchSubgraph(hostStmtCtx, newQuads)
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diff changeset
249 log.debug("patch master with these host stmts %s", p)
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diff changeset
250
226
1e8ef0daf0f8 piNode uses new graph SSE code
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parents: 225
diff changeset
251 def staticStmts(self):
233
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diff changeset
252 return [(HOST[hostname], ROOM['connectedTo'], self.uri, CTX)]
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diff changeset
253
183
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diff changeset
254 def description(self):
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255 """for web page"""
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256 return {
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257 'uri': self.uri,
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258 'devices': [d.description() for d in self._devs],
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259 'graph': 'http://sticker:9059/graph', #todo
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260 }
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261
591
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diff changeset
262 class Dot(PrettyErrorHandler, cyclone.web.RequestHandler):
233
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diff changeset
263 def get(self):
347
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diff changeset
264 configGraph = self.settings.config.configGraph
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diff changeset
265 dot = dotrender.render(configGraph, self.settings.config.boards)
233
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266 self.write(dot)
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267
184
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diff changeset
268 def rdfGraphBody(body, headers):
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diff changeset
269 g = Graph()
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270 g.parse(StringInputSource(body), format='nt')
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diff changeset
271 return g
183
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diff changeset
272
591
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273 class OutputPage(PrettyErrorHandler, cyclone.web.RequestHandler):
182
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274 def put(self):
184
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diff changeset
275 arg = self.request.arguments
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diff changeset
276 if arg.get('s') and arg.get('p'):
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diff changeset
277 subj = URIRef(arg['s'][-1])
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diff changeset
278 pred = URIRef(arg['p'][-1])
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diff changeset
279 turtleLiteral = self.request.body
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parents: 183
diff changeset
280 try:
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diff changeset
281 obj = Literal(float(turtleLiteral))
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diff changeset
282 except ValueError:
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diff changeset
283 obj = Literal(turtleLiteral)
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diff changeset
284 stmt = (subj, pred, obj)
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diff changeset
285 else:
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diff changeset
286 g = rdfGraphBody(self.request.body, self.request.headers)
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diff changeset
287 assert len(g) == 1, len(g)
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diff changeset
288 stmt = g.triples((None, None, None)).next()
182
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289
347
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diff changeset
290 for b in self.settings.config.boards:
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diff changeset
291 b.outputStatements([stmt])
182
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292
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diff changeset
293 class Boards(PrettyErrorHandler, cyclone.web.RequestHandler):
183
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parents: 182
diff changeset
294 def get(self):
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diff changeset
295 self.set_header('Content-type', 'application/json')
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diff changeset
296 self.write(json.dumps({
233
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diff changeset
297 'host': hostname,
347
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diff changeset
298 'boards': [b.description() for b in self.settings.config.boards]
183
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diff changeset
299 }, indent=2))
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300
182
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301 def main():
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302 arg = docopt("""
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303 Usage: piNode.py [options]
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304
408
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305 -v Verbose
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306 --ow Just report onewire device URIs and readings, then exit.
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307 --hub=HOST Hostname for etc3 and oneshot posts. [default: bang.vpn-home.bigasterisk.com]
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308 """)
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309 log.setLevel(logging.WARN)
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310 if arg['-v']:
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311 from twisted.python import log as twlog
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312 twlog.startLogging(sys.stdout)
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313
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314 log.setLevel(logging.DEBUG)
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315
408
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316 if arg['--ow']:
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317 log.setLevel(logging.INFO)
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318 for stmt in devices.OneWire().poll():
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319 print stmt
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320 return
624
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321
226
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322 masterGraph = PatchableGraph()
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323 config = Config(masterGraph, arg['--hub'])
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324
552
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325 static = pkg_resources.resource_filename('homeauto_anynode', 'static/')
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326
182
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327 reactor.listenTCP(9059, cyclone.web.Application([
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328 (r"/(|output-widgets.html)", cyclone.web.StaticFileHandler, {
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329 "path": static, "default_filename": "index.html"}),
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330 (r'/static/(.*)', cyclone.web.StaticFileHandler, {"path": static}),
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331 (r'/stats/(.*)', StatsHandler, {'serverName': 'piNode'}),
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332 (r'/boards', Boards),
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333 (r"/graph", CycloneGraphHandler, {'masterGraph': masterGraph}),
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334 (r"/graph/events", CycloneGraphEventsHandler, {'masterGraph': masterGraph}),
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335 (r'/output', OutputPage),
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336 (r'/dot', Dot),
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337 ], config=config, debug=arg['-v']), interface='::')
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338 log.warn('serving on 9059')
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339 reactor.run()
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340
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341 main()