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annotate service/piNode/piNode.py @ 553:36e4304762ae

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fix /static path dir Ignore-this: 464d6e4dfc28f03240fde8cf1f047e41
author drewp@bigasterisk.com
date Thu, 25 Apr 2019 23:52:22 -0700
parents 98384c3ccd33
children f397ec8bd13d
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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.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
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14 logging.basicConfig(level=logging.DEBUG)
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15
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16 sys.path.append("../../lib")
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17 from patchablegraph import PatchableGraph, CycloneGraphHandler, CycloneGraphEventsHandler
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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('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 def patchRandid():
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51 """
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52 I'm concerned urandom is slow on raspberry pi, and I'm adding to
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53 graphs a lot. Unclear what the ordered return values might do to
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54 the balancing of the graph.
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55 """
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56 _id_serial = [1000]
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57 def randid():
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58 _id_serial[0] += 1
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59 return _id_serial[0]
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60 import rdflib.plugins.memory
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61 rdflib.plugins.memory.randid = randid
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62 patchRandid()
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63
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64 class Config(object):
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65 def __init__(self, masterGraph, hubHost):
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66 self.etcd = etcd3.client(host=hubHost, port=9022)
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67
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68 self.masterGraph = masterGraph
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69 self.hubHost = hubHost
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70 self.configGraph = ConjunctiveGraph()
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71 self.boards = []
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72 self.etcPrefix = 'pi/'
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73
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74 self.reread()
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75
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76 deferToThread(self.watchEtcd)
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77
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78 def watchEtcd(self):
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79 events, cancel = self.etcd.watch_prefix(self.etcPrefix)
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80 reactor.addSystemEventTrigger('before', 'shutdown', cancel)
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81 for ev in events:
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82 log.info('%s changed', ev.key)
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83 reactor.callFromThread(self.configChanged)
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84
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85 def configChanged(self):
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86 self.cancelRead()
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87 self.rereadLater = reactor.callLater(.1, self.reread)
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88
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89 def cancelRead(self):
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90 if getattr(self, 'rereadLater', None):
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91 self.rereadLater.cancel()
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92 self.rereadLater = None
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93
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94 @STATS.configReread.time()
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95 def reread(self):
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96 self.rereadLater = None
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97 log.info('read config')
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98 self.configGraph = ConjunctiveGraph()
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99 for v, md in self.etcd.get_prefix(self.etcPrefix):
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100 log.info(' read file %r', md.key)
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101 self.configGraph.parse(StringInputSource(v), format='n3')
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102 self.configGraph.bind('', ROOM)
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103 self.configGraph.bind('rdf', RDF)
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104 # config graph is too noisy; maybe make it a separate resource
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105 #masterGraph.patch(Patch(addGraph=self.configGraph))
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106 self.setupBoards()
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107
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108 def setupBoards(self):
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109 thisHost = Literal(hostname)
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110 for row in self.configGraph.query(
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111 'SELECT ?board WHERE { ?board a :PiBoard; :hostname ?h }',
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112 initBindings=dict(h=thisHost)):
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113 thisBoard = row.board
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114 break
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115 else:
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116 log.warn("config had no board for :hostname %s. Waiting for config update." %
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117 thisHost)
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118 self.boards = []
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119 return
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120
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121 log.info("found config for board %r" % thisBoard)
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122 self.boards = [Board(self.configGraph, self.masterGraph, thisBoard, self.hubHost)]
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123 self.boards[0].startPolling()
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124
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125
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126 class Board(object):
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127 """similar to arduinoNode.Board but without the communications stuff"""
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128 def __init__(self, graph, masterGraph, uri, hubHost):
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129 self.graph, self.uri = graph, uri
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130 self.hubHost = hubHost
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131 self.masterGraph = masterGraph
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132 self.masterGraph.setToGraph(self.staticStmts())
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133 self.pi = pigpio.pi()
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134 self._devs = devices.makeDevices(graph, self.uri, self.pi)
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135 log.debug('found %s devices', len(self._devs))
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136 self._statementsFromInputs = {} # input device uri: latest statements
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137 self._lastPollTime = {} # input device uri: time()
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138 self._influx = InfluxExporter(self.graph)
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139 for d in self._devs:
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140 self.syncMasterGraphToHostStatements(d)
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141
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142 def startPolling(self):
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143 task.LoopingCall(self._poll).start(.05)
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144
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145 @STATS.boardPoll.time() # not differentiating multiple boards here
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146 def _poll(self):
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147 try:
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148 self._pollMaybeError()
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149 except Exception:
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150 STATS.pollException += 1
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151 log.exception("During poll:")
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152
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153 def _pollMaybeError(self):
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154 pollTime = {} # uri: sec
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155 for i in self._devs:
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156 now = time.time()
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157 if (hasattr(i, 'pollPeriod') and
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158 self._lastPollTime.get(i.uri, 0) + i.pollPeriod > now):
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159 continue
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160 #need something like:
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161 # with i.pollTiming.time():
243
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162 new = i.poll()
304
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163 pollTime[i.uri] = time.time() - now
251
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164 if isinstance(new, dict): # new style
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165 oneshot = new['oneshot']
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166 new = new['latest']
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167 else:
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168 oneshot = None
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169
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170 self._updateMasterWithNewPollStatements(i.uri, new)
251
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171
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172 if oneshot:
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173 self._sendOneshot(oneshot)
243
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174 self._lastPollTime[i.uri] = now
304
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175 if log.isEnabledFor(logging.DEBUG):
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176 log.debug('poll times:')
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177 for u, s in sorted(pollTime.items()):
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178 log.debug(" %.4f ms %s", s * 1000, u)
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179 log.debug('total poll time: %f ms', sum(pollTime.values()) * 1000)
338
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180
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181 pollResults = map(set, self._statementsFromInputs.values())
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182 if pollResults:
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183 self._influx.exportToInflux(set.union(*pollResults))
221
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184
349
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185 def _updateMasterWithNewPollStatements(self, dev, new):
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186 prev = self._statementsFromInputs.get(dev, set())
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187
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188 # it's important that quads from different devices
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189 # don't clash, since that can lead to inconsistent
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190 # patches (e.g.
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191 # dev1 changes value from 1 to 2;
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192 # dev2 changes value from 2 to 3;
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193 # dev1 changes from 2 to 4 but this patch will
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194 # fail since the '2' statement is gone)
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195 self.masterGraph.patch(Patch.fromDiff(inContext(prev, dev),
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196 inContext(new, dev)))
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197 self._statementsFromInputs[dev] = new
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198
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199 @STATS.sendOneshot.time()
251
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200 def _sendOneshot(self, oneshot):
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201 body = (' '.join('%s %s %s .' % (s.n3(), p.n3(), o.n3())
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202 for s,p,o in oneshot)).encode('utf8')
408
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203 url = 'http://%s:9071/oneShot' % self.hubHost
271
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204 d = fetch(method='POST',
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205 url=url,
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206 headers={'Content-Type': ['text/n3']},
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207 postdata=body,
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208 timeout=5)
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209 def err(e):
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210 log.info('oneshot post to %r failed: %s',
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211 url, e.getErrorMessage())
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212 d.addErrback(err)
251
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213
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214 @STATS.outputStatements.time()
233
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215 def outputStatements(self, stmts):
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216 unused = set(stmts)
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217 for dev in self._devs:
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218 stmtsForDev = []
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219 for pat in dev.outputPatterns():
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220 if [term is None for term in pat] != [False, False, True]:
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221 raise NotImplementedError
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222 for stmt in stmts:
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223 if stmt[:2] == pat[:2]:
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224 stmtsForDev.append(stmt)
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225 unused.discard(stmt)
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226 if stmtsForDev:
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227 log.info("output goes to action handler for %s" % dev.uri)
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228 dev.sendOutput(stmtsForDev)
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229
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230 # Dev *could* change hostStatements at any time, and
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231 # we're not currently tracking that, but the usual is
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232 # to change them in response to sendOutput so this
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233 # should be good enough. The right answer is to give
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234 # each dev the masterGraph for it to write to.
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235 self.syncMasterGraphToHostStatements(dev)
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236 log.info("output and masterGraph sync complete")
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237 if unused:
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238 log.info("Board %s doesn't care about these statements:", self.uri)
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239 for s in unused:
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240 log.warn("%r", s)
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241
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242 def syncMasterGraphToHostStatements(self, dev):
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243 hostStmtCtx = URIRef(dev.uri + '/host')
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244 newQuads = inContext(dev.hostStatements(), hostStmtCtx)
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245 p = self.masterGraph.patchSubgraph(hostStmtCtx, newQuads)
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246 log.debug("patch master with these host stmts %s", p)
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247
226
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diff changeset
248 def staticStmts(self):
233
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249 return [(HOST[hostname], ROOM['connectedTo'], self.uri, CTX)]
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250
183
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251 def description(self):
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252 """for web page"""
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253 return {
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254 'uri': self.uri,
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255 'devices': [d.description() for d in self._devs],
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256 'graph': 'http://sticker:9059/graph', #todo
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257 }
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258
233
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diff changeset
259 class Dot(cyclone.web.RequestHandler):
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260 def get(self):
347
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261 configGraph = self.settings.config.configGraph
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262 dot = dotrender.render(configGraph, self.settings.config.boards)
233
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263 self.write(dot)
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264
184
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265 def rdfGraphBody(body, headers):
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266 g = Graph()
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267 g.parse(StringInputSource(body), format='nt')
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268 return g
183
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269
182
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270 class OutputPage(cyclone.web.RequestHandler):
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271 def put(self):
184
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272 arg = self.request.arguments
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273 if arg.get('s') and arg.get('p'):
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274 subj = URIRef(arg['s'][-1])
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275 pred = URIRef(arg['p'][-1])
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276 turtleLiteral = self.request.body
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277 try:
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278 obj = Literal(float(turtleLiteral))
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diff changeset
279 except ValueError:
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280 obj = Literal(turtleLiteral)
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281 stmt = (subj, pred, obj)
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282 else:
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283 g = rdfGraphBody(self.request.body, self.request.headers)
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diff changeset
284 assert len(g) == 1, len(g)
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285 stmt = g.triples((None, None, None)).next()
182
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286
347
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287 for b in self.settings.config.boards:
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288 b.outputStatements([stmt])
182
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289
183
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diff changeset
290 class Boards(cyclone.web.RequestHandler):
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291 def get(self):
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292 self.set_header('Content-type', 'application/json')
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293 self.write(json.dumps({
233
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294 'host': hostname,
347
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295 'boards': [b.description() for b in self.settings.config.boards]
183
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diff changeset
296 }, indent=2))
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297
182
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298 def main():
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299 arg = docopt("""
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300 Usage: piNode.py [options]
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301
408
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diff changeset
302 -v Verbose
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303 --ow Just report onewire device URIs and readings, then exit.
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304 --hub=HOST Hostname for etc3 and oneshot posts. [default: bang.vpn-home.bigasterisk.com]
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305 """)
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306 log.setLevel(logging.WARN)
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307 if arg['-v']:
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308 from twisted.python import log as twlog
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309 twlog.startLogging(sys.stdout)
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310
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311 log.setLevel(logging.DEBUG)
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312
408
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313 if arg['--ow']:
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314 log.setLevel(logging.INFO)
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315 for stmt in devices.OneWire().poll():
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316 print stmt
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317 return
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318
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319 masterGraph = PatchableGraph()
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320 config = Config(masterGraph, arg['--hub'])
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321
552
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322 static = pkg_resources.resource_filename('homeauto_anynode', 'static/')
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323
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324 reactor.listenTCP(9059, cyclone.web.Application([
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325 (r"/()", cyclone.web.StaticFileHandler, {
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326 "path": static, "default_filename": "index.html"}),
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327 (r'/static/(.*)', cyclone.web.StaticFileHandler, {"path": static}),
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328 (r'/stats/(.*)', StatsHandler, {'serverName': 'piNode'}),
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329 (r'/boards', Boards),
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330 (r"/graph", CycloneGraphHandler, {'masterGraph': masterGraph}),
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331 (r"/graph/events", CycloneGraphEventsHandler, {'masterGraph': masterGraph}),
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332 (r'/output', OutputPage),
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333 (r'/dot', Dot),
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334 ], config=config, debug=arg['-v']), interface='::')
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335 log.warn('serving on 9059')
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336 reactor.run()
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337
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338 main()